Lab4_Stopwatch.ipynb

{
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "colab_type": "text",
        "id": "view-in-github"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/github/byuccl/digital_design_colab/blob/dev/Lab4_Stopwatch.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "44oNWyAdaWTh"
      },
      "source": [
        "<p align=\"right\">\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Dataflow/media/BYU.svg\"\n",
        "width=\"500\" height=\"\" style=\"display: block; margin: 0 auto\" />\n",
        "</p>"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "bggKxemnaWQ6"
      },
      "source": [
        "\n",
        "<h1>\n",
        "<summary>\n",
        "<h1 align=\"center\">\n",
        "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\n",
        "<b>$\\color{DarkBlue}{\\underline{\\textbf{Stopwatch}}}$<bol><p align=\"right\">\n",
        "</summary>\n",
        "</h1>"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "z2TXhJuUF0CW"
      },
      "source": [
        "## **Setup**\n",
        "Click the Play Button. No need to expand. Do not touch this. \n",
        "<details><summary>Packages to be downloaded</summary>\n",
        "Things it needs to install:  <br>\n",
        "\n",
        " *    Verilator- the simulator  <br>\n",
        " *    PyGithub - Helps with simulation    <br>\n",
        " *    VCD - Generates waveforms from `.vcd` files  <br>\n",
        " *    Widgets - Each widget must first be generated then will be loaded when played\n",
        "</details>"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "AAQYti20F-u_",
        "outputId": "052b2591-7e1f-4002-ec6f-f7c027c15326"
      },
      "outputs": [],
      "source": [
        "#@title Install VCD { form-width: \"1795px\" }\n",
        "%%bash\n",
        "git clone https://github.com/yne/vcd.git\n",
        "make -C /content/vcd\n",
        "cd /content/vcd\n",
        "make install"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Oqk7oLdHMm_R",
        "outputId": "0f07f395-1960-44d2-96e2-e67dd8f9ff64"
      },
      "outputs": [],
      "source": [
        "#@title Import Files from Repo\n",
        "import ipywidgets as widgets\n",
        "from ipywidgets import GridspecLayout\n",
        "from ipywidgets import AppLayout, Button, Layout, jslink, IntText, IntSlider\n",
        "import requests\n",
        "def import_text(text):\n",
        "  url = 'https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/files/%s' % text\n",
        "  resp = requests.get(url)\n",
        "  with open(text, 'wb') as f:\n",
        "    f.write(resp.content)\n",
        "def import_text_bin(text):\n",
        "  url = 'https://raw.githubusercontent.com/byuccl/digital_design_colab/main/bin/%s' % text\n",
        "  resp = requests.get(url)\n",
        "  with open(text, 'wb') as f:\n",
        "    f.write(resp.content)\n",
        "# import_text(\"tb_dataflow_sv.cpp\")\n",
        "# import_text(\"dataflow_sv3.cpp\")\n",
        "# import_text(\"tb_func2.cpp\")\n",
        "import_text_bin(\"quiz_dict01.py\")\n",
        "import_text_bin(\"tt_widget.py\")\n",
        "import_text(\"frquestion.py\")\n",
        "\n",
        "import tt_widget as tt\n",
        "# import quiz_dict01 as quiz_bot \n",
        "from frquestion import *\n",
        "def quiz_func(a):\n",
        "  quiz_bot.quiz_func(a)\n",
        "\n",
        "!git clone https://github.com/byuccl/digital_design_colab.git"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "tp0SZ76qM_fl",
        "outputId": "cf72eba8-7ad3-4400-e146-c6e35d4df647"
      },
      "outputs": [],
      "source": [
        "#@title Anon Simulation Widget { form-width: \"50px\" }\n",
        "import os\n",
        "import re\n",
        "import sys\n",
        "import subprocess\n",
        "from collections import defaultdict, namedtuple\n",
        "import subprocess\n",
        "import ipywidgets as widgets\n",
        "from ipywidgets import GridspecLayout\n",
        "from ipywidgets import AppLayout, Button, Layout, jslink, IntText, IntSlider\n",
        "!mkdir -p /content/tmp_code\n",
        "def vcd():\n",
        "  !vcd < /content/tmp_code/logs/vlt_dump.vcd > /content/vcd.txt\n",
        "  !sed -i '1,10d'  /content/vcd.txt \n",
        "  !cat /content/vcd.txt\n",
        "\n",
        "\n",
        "VerilogIO = namedtuple(\"VerilogIO\", \"dir nam wid\")\n",
        "'''\n",
        "        Using a namedtuple (sort of like a C-struct) to hold info on each Verilog IO.\n",
        "        This is very similar to using a class with only data members.\n",
        "          The advantages are: (1) the fields are not change-able after creation\n",
        "          (which is what I want), and (2) probably more efficient than using a class.\n",
        "        This is used by both generate() and processVmoduleHFile() so it is declared in global scope.\n",
        "'''\n",
        "\n",
        "\n",
        "def getModuleName(textSourceCode):\n",
        "  match_name = re.search(r\"module\\s{1,}\\w{1,}\\s{0,}#{0,}\\s{0,}\\(\",textSourceCode.value)\n",
        "  if match_name is None:\n",
        "      return None\n",
        "  mname = match_name.group().split(' ')[1]\n",
        "  mname = mname.split('(')[0]\n",
        "  mname = mname.split('#')[0]\n",
        "  return mname\n",
        "\n",
        "def writeJson(d, fname='/tmp/json.json', ind=2):\n",
        "    ''' Write an object to a file with indenting '''\n",
        "    import json\n",
        "    with open(fname, encoding='utf-8', mode='w') as f:\n",
        "        json.dump(d, f, indent=ind)\n",
        "\n",
        "def cd(folder):\n",
        "    ''' My wrapper for os.chdir() so I can print it desired. '''\n",
        "    if folder:\n",
        "        os.chdir(folder)\n",
        "    #print(\"##### Changing to \" + os.getcwd() + \"#####\")\n",
        "\n",
        "def getNextLine(f):\n",
        "    ''' Read file f until you get a non-comment and a non-blank link.\n",
        "        The returned line will be stripped of whitespace (including newline)\n",
        "    '''\n",
        "    while True:\n",
        "        myLine = f.readline().strip()\n",
        "        if not myLine.startswith('//') and len(myLine) > 0:\n",
        "            break\n",
        "    return myLine\n",
        "\n",
        "def processSTMHeader(tBench):\n",
        "    '''\n",
        "        Read STM file and pull out the clock definition and the list of inputs.\n",
        "        Note that for combinational circuits we are expecting a clock line\n",
        "          consisting of 'comb' (which is ignored)\n",
        "    '''\n",
        "    with open(tBench, encoding='utf-8', mode='r') as f:\n",
        "        stmClock = None\n",
        "        tmp = getNextLine(f)\n",
        "        if tmp != 'comb':\n",
        "            stmClock = tmp\n",
        "        inputs = getNextLine(f).split()\n",
        "\n",
        "    # Verify that a signal doesn't appear twice in the list (this is a user-created file after all)\n",
        "    for elmt in inputs:\n",
        "        assert inputs.count(elmt) == 1, \"Cannot have duplicate names in STM file input list. ({} appears more than once)\".format(elmt)\n",
        "    return (stmClock, inputs)\n",
        "\n",
        "def processVmoduleHFile(fname, stmClock, stmInputs):\n",
        "    '''\n",
        "        Process the verilator-produced Vmodule.h file and pull out\n",
        "        the IO definitions.  Pack them into the verilogIOs structure,\n",
        "        which is a list of lists consisting of [dir, name, size].\n",
        "        Along the way see if you can match any of the signals as\n",
        "        corresponding to the clock defined in the stimulus file.\n",
        "        Finally, make sure that all verilog signals are in the stm file\n",
        "          and the other way around.\n",
        "    '''\n",
        "\n",
        "    verilogIOs = []\n",
        "    with open(fname, encoding='utf-8', mode='r') as f:\n",
        "        verilogClock = None\n",
        "        for line in f:\n",
        "            line = line.strip()\n",
        "            if line.startswith('// LOCAL VARIABLES'): # Can skip everything after this line\n",
        "                break\n",
        "            match = re.match(r'^VL_(IN|OUT|SIG)(\\d*)\\(([^,]*),(\\d+),(\\d+)', line)\n",
        "            if match is not None:\n",
        "                varDir, varName, varSize = [match.groups()[0], match.groups()[2], int(match.groups()[3]) - int(match.groups()[4]) +1]\n",
        "                verilogIOs.append(VerilogIO(varDir, varName, varSize))\n",
        "                # If input, check that it is in STM file\n",
        "                if varName == stmClock:\n",
        "                    verilogClock = varName   # Found matching clock names between STM and Verilog header\n",
        "\n",
        "    # Check to make sure that every stm input is in the verilog file\n",
        "    #   and the other way around.\n",
        "    for si in stmInputs:\n",
        "        assert si in [f.nam for f in verilogIOs if f.dir=='IN'], \\\n",
        "            \"ERROR: input '{}' in STM file but not in Verilog design\".format(si)\n",
        "    for vi in [f.nam for f in verilogIOs if f.dir=='IN']:\n",
        "        assert vi == stmClock or vi in stmInputs, \\\n",
        "            \"ERROR: input '{}' in Verilog design but not in STM file\".format(vi)\n",
        "\n",
        "    # Make sure that if a clock was in the STM file, it was found in the Verilog\n",
        "    if stmClock != None:\n",
        "        assert verilogClock != None, \"There was a clock defined in the STM file but no corresponding clock in the Verilog file.\"\n",
        "    return (verilogClock, verilogIOs)\n",
        "from string import Template\n",
        "def generate(designFolder, verilogFile, tBenchFile,\n",
        "             draw = True, wall = True, compress = True, Hex = True, verbose = False,\n",
        "             pythonPath = '', processClockWaveform = True,\n",
        "             hscale = 1, nameOrder = ''):\n",
        "    \"\"\"\n",
        "    Generate a C++ object of verilog/systemverilog code using verilator, toggle inputs on said C++ object,\n",
        "    and portray resulting waveforms of the signals. Comments in the stm file are supported and are indicated with //\n",
        "    Comments must start at the beginning of the line and are expected to take up the whole line\n",
        "    Keyword Arguements:\n",
        "    designFolder -- str - relative path of the directory, where the .v and .stm files are\n",
        "    verilogFile -- str - the top level HDL module\n",
        "    tBenchFile -- str - the name of a .stm file of input stimulus.\n",
        "    draw -- bool - whether or not to display the waveform\n",
        "    wall -- bool whether or not to check for verilator warnings\n",
        "    compress -- bool whether or not to compress the c++ object made by verilator. (Compression effectively\n",
        "      eliminates the ability to view most internal signals  (deprecated)\n",
        "    Hex -- bool - whether to display waveform values in hexadecimal\n",
        "    verbose -- bool - control verbose mode\n",
        "    pythonPath -- str - path to directory where MaverickSimulator project can be found. If left empty, the typical\n",
        "                        PYTHONPATH/site-packages will be assumed\n",
        "    processClockWaveform -- bool -  By default, will attempt to convert the clock waveform to one with arrows.\n",
        "                                    Setting this to False will prevent this\n",
        "    hscale -- int - Will adjust the width of the ticks on the waveform diagram. This arguement is passed directly\n",
        "                    to executeSimulation()\n",
        "    \"\"\"\n",
        "    clock = None    # The name of the clock to the design (if any)\n",
        "    homeDir = os.getcwd()\n",
        "    try:\n",
        "        fileNameRoot = os.path.splitext(verilogFile)[0]\n",
        "        if not pythonPath:\n",
        "            dirs = sys.path\n",
        "            for dir in dirs:\n",
        "                if (dir.find('site-packages') != -1 ):\n",
        "                    #TODO add check to make sure path is valid\n",
        "                    pythonPath = dir + '/MaverickSimulator/src'\n",
        "                    break\n",
        "        # Adjust commandline args for verilator\n",
        "        w = ' -Wall' if wall else ' '\n",
        "        c = ' ' if compress else ' --public '\n",
        "        wv = ' --trace ' if draw else '--trace'\n",
        "\n",
        "        cd(designFolder)\n",
        "\n",
        "        # Step 1: run the verilator program\n",
        "        v = subprocess.Popen(r'verilator -cc'+ w + c + wv + verilogFile + \" -CFLAGS '-std=c++11' --exe sim___.cpp\",    #create verilator object and link to .cpp\n",
        "                             stdout = subprocess.PIPE, stderr = subprocess.STDOUT, shell = True, universal_newlines=True)\n",
        "        verbose = 0\n",
        "        if verbose:\n",
        "            print('Running verilator...')\n",
        "            print('verilator -cc'+ w + c + wv + verilogFile + \" -CFLAGS '-std=c++11' --exe sim___.cpp\")\n",
        "            output = v.stdout.read().strip()\n",
        "            if len(output) > 0:\n",
        "                print('Results of running verilator: ' + output)\n",
        "            if output.find('%Error: Command Failed') != -1:\n",
        "                return 1\n",
        "                sys.exit(\"Exiting due to verilator errors\")\n",
        "        else:\n",
        "            output = v.stdout.read().strip()\n",
        "            if output.find('%Error: Command Failed') != -1:\n",
        "                print(output)\n",
        "                os.chdir(homeDir)\n",
        "                return 1\n",
        "                sys.exit(\"Exiting due to verilator errors\")\n",
        "\n",
        "        # Step 2: Parse STM and Verilog files\n",
        "        # Open .stm file and get clock and list of inputs from the  first two uncommented lines\n",
        "        stmClock, stmInputs = processSTMHeader(tBenchFile)\n",
        "\n",
        "        # Read the IO definitions from the Vmodule.h file\n",
        "        # Add inputs, outputs, and local signals to data structure verilogIOs\n",
        "        verilogClock, verilogIOs = processVmoduleHFile('obj_dir/V'+fileNameRoot+'.h', stmClock, stmInputs)\n",
        "\n",
        "        # If verilogClock has been set that means\n",
        "        # it matched up with the one from the STM file. Otherwise, it did not.\n",
        "        # The rest of the code will use clock to know this.\n",
        "        if verilogClock != None:\n",
        "            clock = verilogClock\n",
        "\n",
        "        # Step 3:Write the Testbench__lh file\n",
        "        ios = ''\n",
        "        sg = ''\n",
        "        # Build list of IO print stmts for printIOs()\n",
        "        for nam, wid in [(f.nam, f.wid) for f in verilogIOs if f.dir!='SIG']:\n",
        "            print(str(nam) + str(wid))\n",
        "            ios += '    std::cout << \" {0} is \" << std::bitset<{1}>(top->{0}) <<  std::endl;\\n'.format(nam, wid)\n",
        "        print(ios)\n",
        "        # If needed, build list of IO print stmts for printInternalOs()\n",
        "        if not compress:\n",
        "            for nam, wid in [(f.nam, f.wid) for f in verilogIOs if f.dir=='SIG']:\n",
        "                varName = nam.replace('v__DOT__', '').replace('__DOT__', ' ')\n",
        "                sg += '   std::cout << \"{} is \" << std::bitset<{}>(top->{}) << std::endl;\\n'.format(varName, wid, nam)\n",
        "        # Now actually write the testBench file into the design directory\n",
        "        with open('TestBench___.h', encoding='utf-8', mode='w') as tb: #header file for interacting with verilator object\n",
        "            with open(\"/content/tmp_code/TBtemplate.txt\", 'r') as tbTemplate:\n",
        "                t = Template(tbTemplate.read())\n",
        "                t = t.substitute(\n",
        "                    MODULE=fileNameRoot,\n",
        "                    CLKDEF = '\\n#define CLK top->'+clock if clock else '',\n",
        "                    IOPRINTS = ios,\n",
        "                    INTERNALIOPRINTS = sg\n",
        "                    )\n",
        "                tb.write(t)\n",
        "\n",
        "        # Step 4: write the main simulation file\n",
        "        # Collect IO print code snippets (using simTemplate2.txt as pattern)\n",
        "        ios = ''\n",
        "        for inputName in stmInputs:\n",
        "            for inputWidth in [f.wid for f in verilogIOs if f.nam==inputName]:\n",
        "                with open(\"/content/tmp_code/simTemplate2.txt\", 'r') as simTemplate2:\n",
        "                    t = Template(simTemplate2.read())\n",
        "                    t = t.substitute(SIGNAME = inputName, SIGWIDTH = inputWidth)\n",
        "                    ios += t\n",
        "\n",
        "        # Now write the main simulation file for compilation (using simTemplate.txt as pattern)\n",
        "        with open('sim___.cpp', encoding='utf-8', mode='w') as sim:\n",
        "            with open(\"/content/tmp_code/simTemplate.txt\",\n",
        "                    encoding='utf-8', mode='r') as simTemplate:  #now write main.cpp file\n",
        "                t = Template(simTemplate.read())\n",
        "                t = t.substitute(\n",
        "                            NUMINS = len(stmInputs),\n",
        "                            READINPUTSCODE = ios,\n",
        "                            HASCLOCK = (0 if clock is None else 1)\n",
        "                            )\n",
        "                sim.write(t)\n",
        "\n",
        "        # Step 5: Compile the resulting program\n",
        "        print(\"Compiling\")\n",
        "        if verbose:\n",
        "            print('make -C obj_dir -j -f V'+fileNameRoot+'.mk V'+fileNameRoot+'; cd obj_dir')\n",
        "            v = subprocess.Popen(r'make -C obj_dir -j -f V'+fileNameRoot+'.mk V'+fileNameRoot+'; cd obj_dir',\n",
        "                                 stdout = subprocess.PIPE, stderr = subprocess.STDOUT, shell = True, universal_newlines=True)\n",
        "            output = v.stdout.read().strip()\n",
        "            if len(output) > 0:  print('   Results of compiling: ' + output)\n",
        "        else:\n",
        "            v = subprocess.Popen(r'make -C obj_dir -j -f V'+fileNameRoot+'.mk V'+fileNameRoot+'; cd /content/tmp_code/obj_dir',    #call makefile to g++ compile appropriate files\n",
        "                                 stdout = subprocess.PIPE, stderr = subprocess.STDOUT, shell = True, universal_newlines=True)\n",
        "\n",
        "        output = v.stdout.read().strip()\n",
        "        # Step 6: Execute it\n",
        "        # if not nameOrder:\n",
        "        #   names = [f.nam for f in verilogIOs if f.dir != 'SIG']\n",
        "        #   writeJson(names, fname=fileNameRoot+'.nmo')\n",
        "        #   nameOrder = fileNameRoot+'.nmo'\n",
        "        # cd(homeDir)\n",
        "        # ret = executeSimulation(designFolder, verilogFile, tBenchFile, draw,\n",
        "        #                     compress, Hex, verbose, clock, nameOrder,\n",
        "        #                     processClockWaveform, hscale, pythonPath)\n",
        "        # if draw is False:\n",
        "        #     return ret\n",
        "        0\n",
        "        subprocess.run([\"/content/tmp_code/obj_dir/V\" +fileNameRoot, \"/content/tmp_code\" + fileNameRoot + \".stm\", \"--trace\" ])\n",
        "        # !./tmp_code/obj_dir/VbehavLoadableReg /content/tmp_code/temp.stm --trace\n",
        "      # !vcd < /content/logs/vlt_dump.vcd\n",
        "        subprocess.run([\"vcd\", \"<\", \"/content/logs/vlt_dump.vcd\"])\n",
        "    except Exception as e:\n",
        "        os.chdir(homeDir)\n",
        "        print(str(e))\n",
        "def showWaveformClicked(self):\n",
        "    sc = cellDict[self]\n",
        "    assert sc is not None, \"Internal error with cellDict\"\n",
        "\n",
        "    if submitCodes(sc.interpreterHomeDir, sc.textSourceCode, sc.textStimulus, sc.selectHexBin.value) == False:\n",
        "        return\n",
        "    srcFileName = getModuleName(sc.textSourceCode)\n",
        "    arrow = sc.chkArrow.value\n",
        "    hex = True if sc.selectHexBin.value is 'Hex' else False\n",
        "    assert os.path.exists(sc.interpreterHomeDir+'/tmp_code/'+srcFileName+'.sv'), \"Please submit the codes before showing waveform: {} {}\".format(sc.interpreterHomeDir, srcFileName)\n",
        "    generate(sc.interpreterHomeDir+'/tmp_code', srcFileName+'.sv', srcFileName+'.stm', compress=True, Hex=hex, verbose=True, processClockWaveform=arrow)\n",
        "    if sc.showCode.value:\n",
        "        print(\"------------------------------------------------------------------------------------------\")\n",
        "        print(\"Source code for the simulation above:\")\n",
        "        print(\"------------------------------------------------------------------------------------------\")\n",
        "        print(sc.textSourceCode.value)\n",
        "        print(\"------------------------------------------------------------------------------------------\")\n",
        "\n",
        "    print(\"###########################################################################################\")\n",
        "    x = subprocess.run([\"/content/tmp_code/obj_dir/V\" +srcFileName, \"/content/tmp_code/\" + srcFileName + \".stm\", \"--trace\" ], stdout = subprocess.PIPE, stderr = subprocess.PIPE)\n",
        "    print(x.stderr + x.stdout)\n",
        "    # x = subprocess.run([\"vcd\", \"< /content/tmp_code/logs/vlt_dump.vcd\" ], stdout = subprocess.PIPE, stderr = subprocess.PIPE)\n",
        "    # print(str(x.stderr) + str(x.stdout))\n",
        "    # # os.system(\"vcd < /content/tmp_code/logs/vlt_dump.vcd\" )\n",
        "    vcd()\n",
        "class SimCell:\n",
        "  def __init__(self, textSourceCode, textStimulus, chkArrow, selectHexBin, interpreterHomeDir, showCode, contents):\n",
        "      self.textSourceCode = textSourceCode\n",
        "      self.textStimulus = textStimulus\n",
        "      self.chkArrow = chkArrow\n",
        "      self.selectHexBin = selectHexBin\n",
        "      self.interpreterHomeDir = \"/content\"\n",
        "      self.showCode = showCode\n",
        "      self.contents = contents\n",
        "def readContents(contents):\n",
        "    if contents is None:\n",
        "        code = ''\n",
        "        stim = ''\n",
        "    else:\n",
        "        print(contents)\n",
        "        contents = \"/content/\" + contents \n",
        "        with open(contents + \".sv\") as f:\n",
        "            code = f.read()\n",
        "        with open(contents + \".stm\") as f:\n",
        "            stim = f.read()\n",
        "        # with open(JTEXT+'/pgms/' + contents[:-1] + \"tm\") as f:\n",
        "        #     stim = f.read()\n",
        "    return [code, stim]\n",
        "\n",
        "cellDict = dict()\n",
        "\n",
        "def CreateWidgets(contents, ht=\"125px\", wid=\"500px\", stht='125px', stwid='500px'):\n",
        "    code, stim = readContents(contents)\n",
        "\n",
        "    srcCodeWidget = widgets.Textarea(\n",
        "                            disabled=False,\n",
        "                            value = code,\n",
        "                            layout=widgets.Layout(height=ht,width=wid),\n",
        "                            )\n",
        "\n",
        "    stimulusWidget = widgets.Textarea(\n",
        "                            value=stim,\n",
        "                            disabled=False,\n",
        "                            layout=widgets.Layout(height=stht, width=stwid),\n",
        "                            )\n",
        "\n",
        "    selectHexBin = widgets.Dropdown(options=['Binary','Hex', 'Decimal'],\n",
        "                                 value='Decimal',\n",
        "                                 description='',\n",
        "                                 disabled=False,\n",
        "                                 )\n",
        "\n",
        "    chkArrow = widgets.Checkbox(description='Show the clock arrow', value=True, indent=False)\n",
        "    showCode = widgets.Checkbox(description='Show source code below waveform', value=False, indent=False)\n",
        "    #butt_submit = widgets.Button(description='Save code')\n",
        "    butt_show_waveform = widgets.Button(description='Run simulation')\n",
        "    butt_refresh_contents = widgets.Button(description='Restore code')\n",
        "    butt_save_code = widgets.Button(description = \"Save code\")\n",
        "    return srcCodeWidget, stimulusWidget, selectHexBin, chkArrow, showCode, butt_show_waveform, butt_refresh_contents, butt_save_code\n",
        "\n",
        "def submitCodes(interpreterHomeDir, textSourceCode, textStimulus, selectHexBin):\n",
        "    print(selectHexBin)\n",
        "    if textSourceCode.value is '' or textStimulus.value is '':\n",
        "        print(\"The source code and stimulus cannot be empty! Please input again\")\n",
        "        print(\"###########################################################################################\")\n",
        "        return False\n",
        "    else:\n",
        "        with open(interpreterHomeDir + \"/tmp_code/\" + getModuleName(textSourceCode) + \".sv\", 'w') as f:\n",
        "            f.write(textSourceCode.value)\n",
        "        with open(interpreterHomeDir + \"/tmp_code/\" + getModuleName(textSourceCode) + \".stm\", 'w') as f:\n",
        "            temp_string = textStimulus.value\n",
        "            temp_string = temp_string + '\\n' + '\\n'\n",
        "            skip_two_lines = 0\n",
        "            cur_substring = \"\"\n",
        "            last_break = ''\n",
        "            binary = ['0', '1', '\\n', ' ']\n",
        "            hex = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C', 'D', 'E', 'F', ' ', '\\n']\n",
        "            if selectHexBin == 'Hex':\n",
        "                for i in textStimulus.value:\n",
        "                    if i == '\\n' and skip_two_lines !=2:\n",
        "                      skip_two_lines+=1\n",
        "                      last_break = '\\n'\n",
        "                      continue\n",
        "                    if skip_two_lines < 2:\n",
        "                      continue\n",
        "                    if hex.count(i) == 0:\n",
        "                        print(\"Invalid Hex Character, Removing...\")\n",
        "                        temp_string = temp_string.replace(i, '')\n",
        "                        continue\n",
        "                    if i != ' ' and i != '\\n':\n",
        "                      cur_substring = cur_substring + i\n",
        "                    elif i == ' ' and cur_substring:\n",
        "                      temp_string = temp_string.replace(last_break + cur_substring + i, last_break + str(int(cur_substring, 16)) + ' ')\n",
        "                      last_break = ' '\n",
        "                      cur_substring = \"\"\n",
        "                    elif i == '\\n' and cur_substring:\n",
        "                      temp_string = temp_string.replace(last_break + cur_substring + i, last_break + str(int(cur_substring, 16)) + '\\n')\n",
        "                      last_break = '\\n'\n",
        "                      cur_substring = \"\"\n",
        "                    elif i == ' ':\n",
        "                      last_break = ' '\n",
        "                    elif i == '\\n':\n",
        "                      last_break = '\\n'\n",
        "            elif selectHexBin == 'Binary':\n",
        "                  for i in textStimulus.value:\n",
        "                    if i == '\\n' and skip_two_lines !=2:\n",
        "                      skip_two_lines+=1\n",
        "                      last_break = '\\n'\n",
        "                      continue\n",
        "                    if skip_two_lines < 2:\n",
        "                      continue\n",
        "                    if binary.count(i) == 0:\n",
        "                        print(\"Invalid Hex Character, Skipping...\")\n",
        "                        continue\n",
        "                    if i != ' ' and i != '\\n':\n",
        "                      cur_substring = cur_substring + i\n",
        "                    elif i == ' ' and cur_substring:\n",
        "                      temp_string = temp_string.replace(last_break + cur_substring + i, last_break + str(int(cur_substring, 2)) + ' ')\n",
        "                      last_break = ' '\n",
        "                      cur_substring = \"\"\n",
        "                    elif i == '\\n' and cur_substring:\n",
        "                      temp_string = temp_string.replace(last_break + cur_substring + i, last_break + str(int(cur_substring, 2)) + '\\n')\n",
        "                      last_break = '\\n'\n",
        "                      cur_substring = \"\"\n",
        "                    elif i == ' ':\n",
        "                      last_break = ' '\n",
        "                    elif i == '\\n':\n",
        "                      last_break = '\\n'\n",
        "            if selectHexBin != \"Decimal\":\n",
        "              print(f\"Converted Values of STM \\n\")\n",
        "              print(temp_string)\n",
        "            f.write(temp_string[:-1])\n",
        "    return True\n",
        "\n",
        "def refreshContentsClicked(self):\n",
        "    sc = cellDict[self]\n",
        "    assert sc is not None, \"Internal error with cellDict\"\n",
        "    code, stim = readContents(sc.contents)\n",
        "    sc.textSourceCode.value = code\n",
        "    sc.textStimulus.value = stim\n",
        "\n",
        "def overwriteSavedCode(self):\n",
        "    sc = cellDict[self]\n",
        "    print(sc.contents)\n",
        "    file_location = \"/content/\" + sc.contents\n",
        "    with open(file_location + \".sv\", \"w\") as f:\n",
        "      f.write(sc.textSourceCode.value)\n",
        "    with open(file_location+\".stm\", \"w\") as f:\n",
        "      f.write(sc.textStimulus.value)\n",
        "\n",
        "def createSimulationWorkSpace(initialContents = None, ht='125px', wid='500px', stht='125px', stwid='500px'):\n",
        "\n",
        "    interpreterHomeDir = os.getcwd()\n",
        "    code_file_path = interpreterHomeDir+'/tmp_code'\n",
        "    if not os.path.exists(code_file_path):\n",
        "        os.mkdir(code_file_path)\n",
        "\n",
        "    # Create widgets for this part\n",
        "    textSourceCode, textStimulus, selectHexBin, chkArrow, showCode, btnShowWaveform, btnRestoreCode, btnSaveCode = CreateWidgets(initialContents, ht, wid, stht, stwid)\n",
        "    #print(textSourceCode.value)\n",
        "    #print(textStimulus.value)\n",
        "\n",
        "    # Register callbacks for when clicking the button\n",
        "    btnShowWaveform.on_click(showWaveformClicked)\n",
        "    btnRestoreCode.on_click(refreshContentsClicked)\n",
        "    btnSaveCode.on_click(overwriteSavedCode)\n",
        "    # Register this cell's info\n",
        "    sc = SimCell(textSourceCode, textStimulus, chkArrow, selectHexBin, interpreterHomeDir, showCode, initialContents)\n",
        "    cellDict[btnShowWaveform] = sc\n",
        "    cellDict[btnRestoreCode] = sc\n",
        "    cellDict[btnSaveCode] = sc\n",
        "\n",
        "\n",
        "    # Draw cell widgets\n",
        "    leftPart = widgets.VBox([\n",
        "                        widgets.VBox([\n",
        "                                widgets.Label('Source code area:'),\n",
        "                                textSourceCode\n",
        "                                ]),\n",
        "                        widgets.VBox([\n",
        "                                widgets.Label('Simulation code area:'),\n",
        "                                textStimulus\n",
        "                                ])\n",
        "                        ])\n",
        "    rightPart = widgets.VBox([\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label('Select Simulation Input Type'),\n",
        "                                selectHexBin,\n",
        "                                showCode,\n",
        "                                #widgets.Label(''),\n",
        "                                btnShowWaveform,\n",
        "                                #widgets.Label(''),\n",
        "                                btnSaveCode,\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label(''),\n",
        "                                widgets.Label(''),\n",
        "                                btnRestoreCode\n",
        "                            ])\n",
        "\n",
        "    # Show widgets\n",
        "    display(widgets.HBox([leftPart,rightPart]))\n",
        "\n",
        "\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "xHXiV6rbNOkf"
      },
      "outputs": [],
      "source": [
        "#@title Import Simulation Files\n",
        "cd(\"/content/tmp_code\")\n",
        "import_text_bin(\"TBtemplate.txt\")\n",
        "import_text(\"simTemplate.txt\")\n",
        "import_text_bin(\"simTemplate2.txt\")\n",
        "import_text(\"mod_counter.sv\")\n",
        "import_text(\"mod_counter.stm\")\n",
        "import_text(\"stopwatch.sv\")\n",
        "import_text(\"stopwatch.stm\")\n",
        "import_text(\"stopwatch_top.sv\")\n",
        "import_text(\"stopwatch_top.stm\")\n",
        "import_text(\"SevenSegmentControl.sv\")\n",
        "# import_text(\"function2.sv\")\n",
        "# import_text(\"function2.stm\")\n",
        "# import_text(\"function3.sv\")\n",
        "# import_text(\"function3.stm\")\n",
        "# import_text(\"function4.sv\")\n",
        "# import_text(\"function4.stm\")\n",
        "# import_text(\"dataflow_sv.stm\")\n",
        "# import_text(\"dataflow_sv.sv\")\n",
        "cd(\"/content\")"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "Y0jredmRNh7O"
      },
      "outputs": [],
      "source": [
        "#@title Grid Creation\n",
        "import ipywidgets as widgets\n",
        "from ipywidgets import GridspecLayout\n",
        "from ipywidgets import AppLayout, Button, Layout, jslink, IntText, IntSlider\n",
        "\n",
        "# function of creating button widget\n",
        "def create_expanded_button(description, button_style, width=\"100px\"):\n",
        "    return Button(\n",
        "        description=description,\n",
        "        button_style=button_style,\n",
        "        layout=Layout(height=\"auto\", width=width),\n",
        "    )\n",
        "\n",
        "\n",
        "# creates variable grid size\n",
        "def create_grid(num_input, input_string, func):\n",
        "    \"\"\"\n",
        "    - num_input = number of inputs in the function\n",
        "    - input_string = a string of all the default values and input names that are passed in (ex: AB000011011)\n",
        "    \"\"\"\n",
        "    num_row = (2**num_input) + 1\n",
        "    num_col = num_input + 2\n",
        "    grid = GridspecLayout(num_row, num_col, width=str(num_col * 117.5) + \"px\")\n",
        "\n",
        "    # creates the default values for the different input combos of the truth table\n",
        "    for i in range(0, num_row):\n",
        "        for j in range(0, num_input):\n",
        "            val = str(input_string[0])\n",
        "            grid[i, j] = create_expanded_button(val, \"info\")\n",
        "            input_string = input_string[1:]\n",
        "\n",
        "    # creates the click to check button as well as the userinput section of the table\n",
        "    for i in range(1, num_row):\n",
        "        grid[i, num_input] = widgets.BoundedIntText(\n",
        "            min=0, max=1, layout=Layout(height=\"auto\", width=\"100px\")\n",
        "        )\n",
        "        grid[0, num_col - 1] = create_expanded_button(\n",
        "            \"Click to Check\", \"warning\", width=\"150px\"\n",
        "        )\n",
        "\n",
        "    # creates the output section of the truth table to know if you're right or not\n",
        "    for i in range(1, num_row):\n",
        "        grid[i, num_col - 1] = create_expanded_button(\" \", \"warning\", width=\"150px\")\n",
        "\n",
        "    grid[0, num_input] = create_expanded_button(func, \"info\")\n",
        "    return grid\n",
        "\n",
        "\n",
        "# checks if the user input is correct\n",
        "def CheckAnswer(grid, num_inputs, input):\n",
        "    for i in range (0,len(input)):\n",
        "        if grid[i + 1, num_inputs].value == int(input[i]):\n",
        "            grid[i + 1, num_inputs + 1].button_style = \"Success\"\n",
        "            grid[i + 1, num_inputs + 1].description = \"Correct!\"\n",
        "        else:\n",
        "            grid[i + 1, num_inputs + 1].button_style = \"Danger\"\n",
        "            grid[i + 1, num_inputs + 1].description = \"Wrong! Submit again\"\n",
        "\n",
        "\n",
        "# AND gate truth table creation\n",
        "grid1_1 = create_grid(2, 'AB00011011', 'F=AB')\n",
        "\n",
        "# OR gate truth table creation\n",
        "grid1_2 = create_grid(2, 'AB00011011', 'F=A+B')\n",
        "\n",
        "# NOT gate truth table creation\n",
        "grid1_3 = create_grid(1, \"A01\", '!A')\n",
        "\n",
        "# NOR gate truth table creation\n",
        "grid1_4 = create_grid(2, 'AB00011011', 'F=NOR')\n",
        "\n",
        "# NAND gate truth table creatione\n",
        "grid1_5 = create_grid(2, 'AB00011011', 'F=NAND')\n",
        "\n",
        "# XOR gate truth table creation\n",
        "grid1_6 = create_grid(2, 'AB00011011', 'F=A^B')\n",
        "\n",
        "# XNOR gat truth table creatione\n",
        "grid1_7 = create_grid(2, 'AB00011011', 'F=~(A^B')\n",
        "\n",
        "# THIS CAN PROBABLY BE PLACED IN THE CREATE FUNCTION WITH F AS AN ARGUMENT ABCF000001010011100101110111\n",
        "\n",
        "\n",
        "# LOOK INTO HAVING THE CHECK ANSWER BUTTON DO DIFFERENT THINGS\n",
        "# DON'T LIKE THIS IMPLEMENTATION. Find a way to only need one 'on_button_clicked' function\n",
        "\n",
        "# Process when clicking the \"Check\" button\n",
        "# AND\n",
        "def on_button_clicked(self):\n",
        "    CheckAnswer(grid1_1, 2, '0001')\n",
        "\n",
        "\n",
        "# OR\n",
        "def on_button_clicked2(self):\n",
        "    CheckAnswer(grid1_2, 2, '0111')\n",
        "\n",
        "\n",
        "# NOT\n",
        "def on_button_clicked3(self):\n",
        "    CheckAnswer(grid1_3, 1, '10')\n",
        "\n",
        "\n",
        "# NOR\n",
        "def on_button_clicked4(self):\n",
        "    CheckAnswer(grid1_4, 2, '1000')\n",
        "\n",
        "\n",
        "# NAND\n",
        "def on_button_clicked5(self):\n",
        "    CheckAnswer(grid1_5, 2, '1110')\n",
        "\n",
        "\n",
        "# XOR\n",
        "def on_button_clicked6(self):\n",
        "    CheckAnswer(grid1_6, 2, '0110')\n",
        "\n",
        "\n",
        "# XNOR\n",
        "def on_button_clicked7(self):\n",
        "    CheckAnswer(grid1_7, 2, '1001')"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "JjIh_NwVNv0-"
      },
      "outputs": [],
      "source": [
        "#@title Multiple Choice Creation\n",
        "from IPython.display import IFrame, display, HTML\n",
        "import ipywidgets as widgets\n",
        "from ipywidgets import GridspecLayout\n",
        "from ipywidgets import AppLayout, Button, Layout, jslink, IntText, IntSlider\n",
        "# function of creating button widget\n",
        "def create_expanded_button(description, button_style, width='400px'):\n",
        "    return Button(description=description, button_style=button_style, layout=Layout(height='auto', width=width))\n",
        "\n",
        "# function of creating grid layout\n",
        "def create_grid(A,B,C,D):\n",
        "    grid = GridspecLayout(5, 3, width='470px')\n",
        "    grid[0,0]=create_expanded_button(A,'primary')\n",
        "    grid[1,0]=create_expanded_button(B,'primary')\n",
        "    grid[2,0]=create_expanded_button(C,'primary')\n",
        "    grid[3,0]=create_expanded_button(D,'primary')  \n",
        "    grid[4,0]=create_expanded_button('Submit','Danger')  \n",
        "    return grid\n",
        "\n",
        "\n",
        "def check_answermc4(self):\n",
        "  \"\"\"\n",
        "  Used with .on_click to makesure the answer is correct\n",
        "    self: This is a button. We have added 2 new attributes to it\n",
        "      current_answer: This is the last clicked button and its description value stored as a str\n",
        "      answer: This is the correct answer from the mcdict\n",
        "\n",
        "  \"\"\"\n",
        "  if self.current_answer == 0:\n",
        "    return\n",
        "  if self.answer[0] == self.current_answer[0]:\n",
        "    self.button_style = \"Success\"\n",
        "    self.description = \"Correct!\"\n",
        "  else:\n",
        "    self.button_style = 'Danger'\n",
        "    self.description = \"Wrong, Try Again!\"\n",
        "\"\"\"\n",
        "key: The question number\n",
        "pair: This should be a list. indexes 0-3 are the choices. 4 is the answer. 5 is the question\n",
        "answer: This must be the same str value as the choice\n",
        "question: This is used in the header\n",
        "\"\"\"\n",
        "mc_dict = {\n",
        "\n",
        "    \"1\": [\"A. 0101\",\"B. 01010\", \"C. 1010\",\"D. Syntax Error\", \"A\", \"What is the value of A[5:2] where A = 9’b101010101?\"],\n",
        "    \"2\": [\"A. 11010\", \"B. 10100\", \"C. 10111\", \"D. 01000\", \"B\", \"What is the value of A << 3 where A  = 5’b11101 ?\"],\n",
        "    \"3\": [\"A. 10111\", \"B. 11101\", \"C. 101\", \"D. Syntax Error\", \"A\", \"What is the Value of {A,B} where A = 3’b101 and B = 2’11?\"],\n",
        "    \"4\": [\"A. 1010\", \"B. 111000\", \"C. 101010\", \"D. Syntax Error\", \"C\", \"What is the value of {3{2’b10}}?\"],\n",
        "    \"5\": [\"A.logic input [3:0] x\", \"B. logic [3:0] input x\", \"C. input logic x [3:0]\", \"D. input logic [3:0] x\", \"D\", \"Which signal is defined correctly?\"  ],\n",
        "    \"6\": [\"A 1’b1\", \"B. 1’b0\", \"C. An Error will be thrown\", \"D. Undefined\", \"C\", \"What is the value of x from the code above?\"],\n",
        "    \"7\": [\"A. 1’b1\", \"B. 1’b0\", \"C. 2’b11\", \"D. An Error will be thrown\", \"A\", \"What is the value of x from the above code?\"] ,\n",
        "    \"8\": [ \"A. 4'b0001\", \"B. 4'b0011\", \"C. 4'b0111\", \"D. 4'b1001\", \"D\", \"What is the value of x in the above code?\" ]\n",
        "}\n",
        "def multiple_choice4(key, dictionary):\n",
        "  \"\"\"\n",
        "  Creates a multiple choice widget that has 4 options. \n",
        "  key: This is the key to the dictionary. It will be a str of digits. \n",
        "  dictionary: the dictionary used is mc_dict. Which houses the multiple choice answers.\n",
        "  grid: The grid that has been set up and can be shown\n",
        "  header_button: sets the header_button that houses the question description\n",
        "  \"\"\"\n",
        "  answers = dictionary[key]\n",
        "  question = answers[5]\n",
        "  A = answers[0]\n",
        "  B = answers[1]\n",
        "  C = answers[2]\n",
        "  D = answers[3]\n",
        "  grid = create_grid(A,B,C,D)\n",
        "  correct_answer = answers[4]\n",
        "  setattr(grid[4,0], \"answer\", correct_answer)\n",
        "  current_answer = 0\n",
        "  setattr(grid[4,0], \"current_answer\", 0)\n",
        "  grid[4,0].button_style = \"Warning\"\n",
        "  def change_color(self):\n",
        "    current_btn = int(self.layout.grid_area[-1])\n",
        "    for i in range(0,4):\n",
        "      grid[i,0].button_style = 'primary'\n",
        "    grid[current_btn-1,0].button_style = 'info'\n",
        "    grid[4,0].current_answer = self.description\n",
        "\n",
        "  for i in range(0,4):\n",
        "    grid[i,0].on_click(change_color)\n",
        "  grid[4,0].on_click(check_answermc4)\n",
        "  header_button = create_expanded_button(question, 'info', '465px')\n",
        "  return grid, header_button\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "TBXE9hMnN6uj"
      },
      "outputs": [],
      "source": [
        "#@title Verilator Install\n",
        "!apt-get install verilator >/dev/null"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "NLN6p4TTZI5v"
      },
      "outputs": [],
      "source": [
        "# @title Install Interactive Simulation\n",
        "def altair_sim():\n",
        "  with open(\"/content/tmp_code/logs/vlt_dump.vcd\", \"r\") as f:\n",
        "      # Remove Date, Program and  Timescale\n",
        "      for i in range(20):\n",
        "          line = f.readline()\n",
        "          words = line.split()\n",
        "          try:\n",
        "            words[0]\n",
        "          except:\n",
        "            line = f.readline()\n",
        "            words = line.split()\n",
        "            continue\n",
        "          if words[0] == \"$date\" or words[0] == \"$timescale\" or words[0] == \"$version\":\n",
        "              for i in range(10):\n",
        "                  line = f.readline()\n",
        "                  words = line.split()\n",
        "                  if words[0] == \"$end\" or words[-1] == \"$end\":\n",
        "                      break\n",
        "          else:\n",
        "              break\n",
        "          line = f.readline()\n",
        "      # Create the dictionary of lists for inputs\n",
        "      signals = {}\n",
        "      line = f.readline()\n",
        "      words = line.split()\n",
        "      symbols = {}\n",
        "      for i in range(50):\n",
        "          try:\n",
        "            words[0]\n",
        "          except:\n",
        "            line = f.readline()\n",
        "            words = line.split()\n",
        "            continue\n",
        "          if words[0] == \"$var\":\n",
        "              signals[words[4]] = []\n",
        "              symbols[words[3]] = words[4]\n",
        "\n",
        "          elif words[0] == \"$enddefinitions\":\n",
        "              break\n",
        "          line = f.readline()\n",
        "          words = line.split()\n",
        "      k = 0\n",
        "\n",
        "      value = 0\n",
        "      for i in range(0, 13000):\n",
        "          if not words:\n",
        "              line = f.readline()\n",
        "              words = line.split()\n",
        "              continue\n",
        "          elif words[0] == \"$dumpvars\":\n",
        "              line = f.readline()\n",
        "              words = line.split()\n",
        "              for i in range(50):\n",
        "                  if words[0] == \"$end\":\n",
        "                      break\n",
        "                  else:\n",
        "                      lines = f.readline()\n",
        "                      words = line.split()\n",
        "\n",
        "          elif len(words) > 1:\n",
        "              if words[0][0] == \"b\":\n",
        "                  if words[0][1] == \"x\":\n",
        "                      value = 0\n",
        "                  else:\n",
        "                      try:\n",
        "                          value = int(words[0][1:-1],2)\n",
        "                      except:\n",
        "                          value = int(words[0][1],2)\n",
        "                  symbol = words[1]\n",
        "                  signals[symbols[symbol]].append(value)\n",
        "          elif words[0][0] == \"#\" and words[0][0] != \"0\":\n",
        "              k = k + 1\n",
        "              for key in signals:\n",
        "                  if len(signals[key]) < k:\n",
        "                      try:\n",
        "                          signals[key].append(signals[key][-1])\n",
        "                      except:\n",
        "                          signals[key].append(0)\n",
        "          else:\n",
        "              if words[0][0] == \"x\":\n",
        "                  value = 0\n",
        "              else:\n",
        "                  value = int(words[0][0:-1])\n",
        "              symbol = words[0][-1]\n",
        "              signals[symbols[words[0][-1]]].append(value)\n",
        "          line = f.readline()\n",
        "          words = line.split()\n",
        "      length_df = 0\n",
        "      dataframe = signals\n",
        "      for i in dataframe:\n",
        "        if length_df < len(dataframe[i]):\n",
        "          length_df = len(dataframe[i])\n",
        "      for i in dataframe:\n",
        "        if len(dataframe[i]) < length_df:\n",
        "          dataframe[i].append(dataframe[i][-1])\n",
        "      # Create a list of variables and their names (ignore types)\n",
        "      # Create a key to translate the signals\n",
        "      # Begin Cycling through the signals\n",
        "  dataframe1 = signals\n",
        "  df_max = 0\n",
        "  for i in dataframe:\n",
        "    if df_max < max(dataframe[i]):\n",
        "      df_max = max(dataframe[i])\n",
        "  import altair as alt\n",
        "  import pandas as pd\n",
        "  import numpy as np\n",
        "  from vega_datasets import data\n",
        "  length_df = 0\n",
        "  for i in dataframe:\n",
        "    if len(dataframe[i]) > length_df:\n",
        "      length_df = len(dataframe[i])\n",
        "  def make_waveform(dataframe):\n",
        "    length_df = 0\n",
        "    for i in dataframe:\n",
        "\n",
        "      if len(dataframe[i]) > length_df:\n",
        "        length_df = len(dataframe[i])\n",
        "\n",
        "    source = pd.DataFrame( dataframe, index=pd.RangeIndex(length_df, name='x'))\n",
        "    source = source.reset_index().melt('x', var_name='signals', value_name='y')\n",
        "    scales = alt.selection_interval(bind='scales')\n",
        "\n",
        "    multi_mouseover = alt.selection_multi(on='mouseover', toggle=True, empty='none')\n",
        "\n",
        "    selection = alt.selection_multi(fields=['signals'], bind='legend')\n",
        "\n",
        "    # Create a selection that chooses the nearest point & selects based on x-value\n",
        "    nearest = alt.selection(type='multi', nearest=True, on='mouseover',\n",
        "                            fields=['x'], empty='none')\n",
        "\n",
        "    # The basic line\n",
        "    line = alt.Chart(source).mark_line(interpolate='step-after').encode(\n",
        "        x='x:Q',\n",
        "        y='y:Q',\n",
        "        color='signals:N'\n",
        "    )\n",
        "\n",
        "    # Transparent selectors across the chart. This is what tells us\n",
        "    # the x-value of the cursor\n",
        "    selectors = alt.Chart(source).mark_point().encode(\n",
        "        x='x:Q',\n",
        "        opacity=alt.value(0),\n",
        "    ).add_selection(\n",
        "        nearest,\n",
        "        scales\n",
        "    )\n",
        "\n",
        "    # Draw points on the line, and highlight based on selection\n",
        "    points = line.mark_point().encode(\n",
        "        opacity=alt.condition(nearest, alt.value(1), alt.value(0))\n",
        "    )\n",
        "\n",
        "    # Draw text labels near the points, and highlight based on selection\n",
        "    text = line.mark_text(align='left', dx=5, dy=-5).encode(\n",
        "        text=alt.condition(nearest, 'y:Q', alt.value(''))\n",
        "    )\n",
        "\n",
        "    # Draw a rule at the location of the selection\n",
        "    rules = alt.Chart(source).mark_rule(color='black').encode(\n",
        "        x='x:Q',\n",
        "    ).transform_filter(\n",
        "        nearest\n",
        "    )\n",
        "\n",
        "    # Put the five layers into a chart and bind the data\n",
        "    waveform=alt.layer(\n",
        "        line, selectors, points, rules, text\n",
        "    ).encode(\n",
        "        alt.X(scale=alt.Scale(domain=(0,length_df))),\n",
        "        alt.Y(scale=alt.Scale(domain=(0,df_max+1))),\n",
        "        opacity=alt.condition(selection, alt.value(1), alt.value(0.2))\n",
        "    ).properties(\n",
        "        width=600, height=400\n",
        "    ).add_selection(\n",
        "        selection\n",
        "    )\n",
        "\n",
        "    histogram = alt.Chart(source).mark_bar().encode(\n",
        "      alt.X('y', \n",
        "          scale=alt.Scale(domain=(0,df_max + 1))),\n",
        "      y='signals',\n",
        "      color='signals:N',\n",
        "\n",
        "    ).transform_filter(nearest).properties(\n",
        "        width = 600, height = 200\n",
        "    )\n",
        "    text = histogram.mark_text(\n",
        "        align = 'left',\n",
        "        baseline = 'middle',\n",
        "        dx = 3\n",
        "    ).encode(\n",
        "        text = 'y:Q'\n",
        "    )\n",
        "    histogram = histogram + text  \n",
        "    return waveform, histogram\n",
        "\n",
        "  waveform1, histogram1 = make_waveform(dataframe1)\n",
        "  return waveform1, histogram1\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "jAVVCY9_utFo"
      },
      "source": [
        "\n",
        "# Stopwatch"
      ]
    },
    {
      "attachments": {},
      "cell_type": "markdown",
      "metadata": {
        "id": "MMdexx0J9gfC"
      },
      "source": [
        "###Frequency Vs Period\n",
        "\n",
        "Frequency is the number of times something occurs in a given time frame, while period is the amount of time it takes for something to occur. They are inverses of one another. $Period = \\frac{1}{Frequency}$ and $Frequency = \\frac{1}{Period}$. \n",
        "\n",
        "This is important when dealing with Clocks in circuits.\n",
        "\n",
        "Example:  \n",
        "You are running around a pillar while \n",
        "playing tag. \n",
        "\n",
        "You run around it 3 times every minute. That is your frequency.  \n",
        "\n",
        "The period would be $\\frac{1}{Frequency}$, so every 1/3 of a minute or 20 seconds you would complete a circle. This is the period.\n",
        "\n",
        "\n",
        "So why does Frequency and Period matter?    \n",
        "\n",
        "Timing is very important because of the FPGAs built in clock. The clock keeps all elements in the circuit working together and prevents conflicts.    \n",
        "\n",
        "In this lab, inorder to create a stopwatch, you will need to know how many clock cycles occur in a given time frame, then after counting that many, increment the stopwatch."
      ]
    },
    {
      "cell_type": "code",
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        "id": "c6K_rO15Z4TR",
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      "source": [
        "#@title\n",
        "frq_1[0,2].on_click(check_frq_1)\n",
        "header_button = create_expanded_button('If the Period is 5 Microseconds what is the Frequency?', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_1])\n",
        "\n",
        "\n"
      ]
    },
    {
      "cell_type": "code",
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        },
        "id": "JoKfPndDHfhu",
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      "outputs": [],
      "source": [
        "#@title\n",
        "frq_2[0,2].on_click(check_frq_2)\n",
        "header_button = create_expanded_button('If the Period is 25 ns what is the Frequency? ', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_2])\n",
        "\n"
      ]
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    {
      "cell_type": "code",
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      "source": [
        "#@title\n",
        "frq_3[0,2].on_click(check_frq_3)\n",
        "header_button = create_expanded_button('If the Frequency is 10GHZ what is the Period?', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_3])"
      ]
    },
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      "cell_type": "code",
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      "source": [
        "#@title\n",
        "frq_4[0,2].on_click(check_frq_4)\n",
        "header_button = create_expanded_button('If the frequency is 25Hz what is the Period?', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_4])"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "CCjkU0TVJstM"
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      "source": [
        "####Clock\n",
        "\n",
        "\n",
        "You've probably seen a computer say that it has a 2.1 GHZ clock speed. This means that it clocks goes from `1` to `0` 2.1*10^9 times every a second.   \n",
        "<br>\n",
        "\n",
        "The clock is used in making sure all parts of the circuit are synchronized. We have only been working with combination logic which doesn't require a clock, but now we will discuss sequential logic. \n",
        "\n",
        "As you've noticed, one downside of combinational logic is that our circuit cannot store any values. We will now discuss how gate level logic could store a value in a circuit."
      ]
    },
    {
      "attachments": {},
      "cell_type": "markdown",
      "metadata": {
        "id": "WSoZGK4UwZ1T"
      },
      "source": [
        "#Flip Flops\n",
        "What if we want to store a value?  \n",
        "What if we want to temporarily store a `1` somewhere?  \n",
        "This is where flip flops come in.  A flip flop stores a single bit.  \n",
        "\n",
        "The first example is the SR latch:  \n",
        "\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/srlatch(1).svg\"\n",
        "width=\"400\" height=\"200\" style=\"display: block; margin: 0 auto \" />\n",
        "<br> \n",
        "\n",
        "It has 2 inputs, `S` which is the data, and `R` which is a reset. Its output is `Q`. If `S` is high then the circuit will go high as well and stay there. Reset can be used to make the circuit go low and stay there. The value of `Q` stores a bit. There is also always a `Q'` value. Though this has some problems, if `S` is `0` this does not cause `Q` to be `0`. Also if `S` and `R` are high, the behavior is unknown.  \n",
        "\n",
        "<br><br>\n",
        "Next is the Gated SR Latch:  \n",
        "<br>\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/gatedsrlatch.svg\"\n",
        "width=\"400\" height=\"200\" style=\"display: block; margin: 0 auto \" />\n",
        "<br>\n",
        "\n",
        "The problem above is that if S or R change, then Q will usually change as well. This isn't the best \n",
        "To better control the latch we will use a `GATE` signal. In this example and in general, it is driven by the `clk` signal. The value of `Q` can only change whlie `GATE` is high. This means if `GATE` is `1` and `S` is `0` then `Q` will become `0`.   \n",
        "<br>\n",
        "<br>\n",
        "Finally, the Gated D Latch: \n",
        "\n",
        "<br>\n",
        "\n",
        "\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/gateddlatch.svg\"\n",
        "width=\"400\" height=\"200\" style=\"display: block; margin: 1000 \" />  \n",
        "<br>\n",
        "To simplify the design more, we will only have two inputs, `D` which will be the data (a combination of `S` and `R`), and `clk`.  \n",
        "We can replace the `R` signal with an inverter attached to `S`, which we will now call `D`.  This makes a Gated D Latch which looks like this. Whenver `clk` is high, `Q` will become whatever `D` is. This fixes the earlier problem, where if `R` and `S` were the same they would cause undefined behavior, because they will always be different.\n",
        "\n",
        "<br>\n",
        "<br>\n",
        "<br>\n",
        "\n",
        "\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/latch.svg\"\n",
        "width=\"400\" height=\"200\" style=\"display: block; margin: 1000 \" />  \n",
        "<br>  \n",
        "\n",
        "Gated D Latches are so common this symbol is used to represent it. There is a small problem though, if `D` is changed to quickly, it can cause a race. The signal will rush from `D` and split. The two different paths will race each other. It is unknown which path will win, especially since the `clk` signal will turn quickly after. This means that we don't know what the value of `Q` will be, which isn't good.\n",
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/masterslave.svg\"\n",
        "width=\"400\" height=\"200\" style=\"display: block; margin: 1000 \" />  \n",
        "<br>\n",
        "To prevent metastability (where we are unsure of the states of the circuit) and to use the rising clock edge we utilize a Master-Slave Flip Flop design. This results in a latch where the output only changes on the rising edge (when the CLK goes from low to high) of falling edge (where the CLK goes from high to low) of the CLK signal. \n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "_mW-Mi0tRc4c"
      },
      "source": [
        "### How this works in SystemVerilog"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "1RW-uVadRf9A"
      },
      "source": [
        "Instead of using `always_comb` blocks we will now use a `always_ff` block. The standard is `always_ff @(posedge clk)`  \n",
        "\n",
        "`@(posedge clk)` means that the block will trigger every time the signal, in the case `clk`, goes from low to high. \n",
        "\n",
        "The simplest example is a counter.\n",
        "\n",
        "```\n",
        "always_ff @(posedge clk)\n",
        "q<= q + 1;\n",
        "```\n",
        "\n",
        "Once per clock cycle, `q` will increase by one. \n",
        "\n",
        "This is the basic element of our stopwatch. A simple sequential counter. Using some if/else statements we can have it reset when Q reaches a certain value. \n",
        "\n",
        "Though one obvious problem is that a clock cycle is a very small fraction of a second. With a 100MHZ clock, the counter goes up every 0.00000001 seconds. \n",
        "\n",
        "So we must calculate how many cycles we want before one hundreth of a second passes. \n",
        "Then we will use the rollover value, a separate signal that is high after the counter resets, to increment the next module. "
      ]
    },
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      "source": [
        "#@title\n",
        "frq_5[0,2].on_click(check_frq_5)\n",
        "header_button = create_expanded_button('If the frequency of the Clock is 100MHZ, what is the period?', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_5])"
      ]
    },
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      "source": [
        "#@title\n",
        "frq_6[0,2].on_click(check_frq_6)\n",
        "header_button = create_expanded_button('So, how many clock cycles in 1/10th of a second? ', 'primary', '600px')\n",
        "widgets.VBox([widgets.AppLayout(header=header_button,footer=None),frq_6])"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "tGwsq0_EvLO_"
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      "source": [
        "\n",
        "## The Pieces of the Stopwatch\n",
        "\n",
        "\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "u8A2ZyBixMeH"
      },
      "source": [
        "### Parameters with Modules\n"
      ]
    },
    {
      "attachments": {},
      "cell_type": "markdown",
      "metadata": {
        "id": "WM83Xf8s2ma_"
      },
      "source": [
        "For the first counter module, we want it to count to a certain number, so that it increments every 1/100th of a second. But for your next module you'll want it to increment every 10 times the first one increments.\n",
        "This means that the value at which we reset our counters with is different for different modules. We could code it multiple timee, instead we will define a parameter. \n",
        "\n",
        "Parameters act like arguments in a function. Parameters set a variable to a certain value. So, ou can give the module a parameter to define what number it counts to.\n",
        "\n",
        "\n",
        "The syntax for it is as follows for creating the module:  \n",
        "```\n",
        "module module_name #(\n",
        "  parameter parameter_name= default_value;\n",
        "  ... \n",
        " )\n",
        " (input signal_1\n",
        " ...\n",
        " output signal_2\n",
        " ...);\n",
        " ...\n",
        " endmodule\n",
        " ```  \n",
        "\n",
        " The parameters are defined in the parenthesis and given a default value defined by you. They don't need a type.\n",
        "\n",
        " When instantiating the module you can give values to any number of parameters.\n",
        "```\n",
        "module_name #(PARAMETER_1 = parameter_value) module_1 ( .....);\n",
        "```\n",
        "\n",
        "\n",
        "You can give each parameter a value. So the only thing you need to add is the `#` and give parameters, when compared to a normal instantiation."
      ]
    },
    {
      "attachments": {},
      "cell_type": "markdown",
      "metadata": {
        "id": "e3IHdB1JEk-j"
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      "source": [
        "###__Sequential Logic Tips and Tricks__ \n",
        "###Reset\n",
        "We need a way to restart the stopwatch. As a general rule, all circuits that use flip flops should have a reset. When reset is high, no matter the other inputs, all flip flops should go to `0`. In this case it would be the counters.\n",
        "\n",
        "We will use `BTNC` for this module. While `BTNC` is high, all counters should be reset.\n",
        "\n",
        "There are two kinds of resets, Asynchronous and Synchronous. Synchronous reset on the clock cycle, while Asynchronous occurs right when the value is switched.\n",
        "###Always_ff blocks\n",
        "Instead of using an `=` like in `always_comb`, `always_ff` uses an `<=`. If you use an `=` your code may have undefined behavior. \n",
        "\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "Mj6UYRUWxXDC"
      },
      "source": [
        "### The Counter Module"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "u1AI5_rwLFQs"
      },
      "source": [
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/mod_counter.png\"\n",
        "width=\"400\" height=\"150\" style=\"display: block; margin: 0 auto \" />\n",
        "<br>\n",
        "\n",
        "| Module Name: | mod_counter|||\n",
        "| -- --------- | ----------- |--|--|\n",
        "| Port Name      | Direction       |Width|Function|\n",
        "|reset \t|Input \t|1| Active high reset|\n",
        "|clk \t|Input \t|1| Clock used for timing|\n",
        "|increment \t|Input \t|1 | should only increment when enable if its high|\n",
        "| MOD_VALUE|\tParameter| \tN/A| Value at which counter should reset, default of 10 \t|\n",
        "| rollover\t|Output \t|1| \tHigh for one cycle when counter rolls over|\n",
        "|count| \tOutput \t|4| \tCurrent value of the counter|\n",
        "\n",
        "\n",
        "<br>\n",
        "\n",
        "When increment is high, the counter should begin increasing. When it reaches the MOD_VALUE, it should reset to zero and rollover should be high for that clock cycle. \n",
        "\n"
      ]
    },
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        "id": "ZAYksz5ipeit",
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      "outputs": [],
      "source": [
        "#@title\n",
        "createSimulationWorkSpace(\"tmp_code/mod_counter\")\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "Y382G0GtxdBR"
      },
      "source": [
        "### The Stopwatch Module\n",
        "\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "SjPNJpZ9eCC5"
      },
      "source": []
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "h8_j0wA4RH4X"
      },
      "source": [
        "<img src=\"https://raw.githubusercontent.com/byuccl/digital_design_colab/main/Stopwatch/media/stopwatch_module.jpg\"\n",
        "width=\"500\" style=\"display: block; margin: 0 auto \" />\n",
        "<br><br>\n",
        "\n",
        "| Module Name: | stopwatch |||\n",
        "| -- --------- | ----------- |--|--|\n",
        "| Port Name      | Direction       |Width|Function|\n",
        "|clk \t|Input \t|1| The Clock Signal|\n",
        "|reset \t|Input \t|1| Active high reset|  \n",
        "|run \t|Input \t|1 | High when timer should be running|\n",
        "| digit0\t|Output \t|4| The value of the hundredths of a second digit|\n",
        "| digit1\t|Output \t|4| The value of the tenths of a second digit|\n",
        "| digit2\t|Output \t|4| The value of the seconds digit|\n",
        "| digit3\t|Output \t|4| The value of the tens of seconds digit|\n",
        "\n",
        "<br>\n",
        "\n",
        "\n",
        "You will  have to create a separate counter. This one will reset and give a rollover value every .01s. This cannot be an instantiation of `mod_counter` because its `count` value will be wider than 4 bits. This `rollover` will be fed into `digit0` as the `increment`.\n",
        "\n",
        "\n",
        "You will also have to instantiate 4 different instances of `mod_counter`, `digit0` through `digit3`.\n",
        "\n",
        "When `digit0` reaches 9 it should increment `digit1` and go back to `0`. So on for all 4 digits. `digit3` should rollver at `5` (60 seconds in a minute after all)"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "cellView": "form",
        "id": "zb6lJ8Q6vewy"
      },
      "outputs": [],
      "source": [
        "#@title\n",
        "createSimulationWorkSpace(\"tmp_code/stopwatch\")"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "UUCB26A_vQTz"
      },
      "source": [
        "\n",
        "## Creating a Top Module"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "BM2qnET1Tqh5"
      },
      "source": [
        "# Top Level Module\n",
        "| Module Name: | stopwatch_top|||\n",
        "| -- --------- | ----------- |--|--|\n",
        "| Port Name      | Direction       |Width|Function|\n",
        "|clk \t|Input \t|1| The Clock Signal |\n",
        "| btnc \t|Input \t|1 | Active High Reset|\n",
        "| sw\t|Input \t|1| High when stopwatch should be running |\n",
        "| anode\t|Output \t|4| Seven-segment anode values, from Seven-Segment Controller|\n",
        "| segment\t|Output \t|8| Seven-segment segment values,  from Seven-Segment Controller|  \n",
        "\n",
        "The `clk` signal is defined in the XDC.  \n",
        "\n",
        "When `btnc` is pressed, the stopwatch should go to `0` for all digits.\n",
        "\n",
        "While the switch is high, the stopwatch should begin to increment. You should time it with a different stopwatch to make sure that your stopwatch is keeping accurate time.  \n",
        "\n",
        "You can concatenate the 4 digits together to create the `datain` signal for `SevenSegmentControl`.\n",
        "\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "uP0wuOwu82R6"
      },
      "source": [
        "NOTE: We are giving you the Seven Segement Control Module. This allows you to show 4 unique digits by quickly alternativing between the 4 different valuse faster than your eyes can see.   \n",
        "\n",
        "* `dataIn`: 16 bits, each 4 bits are a hex value which is shown as a digit.  \n",
        "* `digitDisplay`: 4 bits, if you want all 4 digits, pass `1111` into it.  \n",
        "* `digitPoint`: This determines which digit point is on.   \n",
        "* `anode`: Hook this up to the output `anode` signal \n",
        "* `segment`: Hook up to the output `segment` signal \n",
        "* `reset`, and `clk`: Self-explanatory inputs"
      ]
    },
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        "id": "N2eL6OBHveTY",
        "outputId": "ea9a1735-ca30-4839-cf9a-37890ccf4517"
      },
      "outputs": [],
      "source": [
        "#@title\n",
        "createSimulationWorkSpace(\"tmp_code/stopwatch_top\")"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "_toaZpwTui3E"
      },
      "source": [
        "\n",
        "## Compiling with the F4PGA Toolchain\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "IQd2K_jAwbFS"
      },
      "source": [
        "### Installing the Toolchain"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ZQFNmbQquBYV",
        "outputId": "d65ad036-0110-4a3a-eec2-2151b606081c"
      },
      "outputs": [],
      "source": [
        "!apt install -y git wget xz-utils"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "rF1gehMvuC1L",
        "outputId": "91a81588-c9df-405c-c78d-1ceef68a67cf"
      },
      "outputs": [],
      "source": [
        "%%bash\n",
        "cd /content\n",
        "git clone https://github.com/chipsalliance/f4pga-examples\n",
        "cd f4pga-examples\n",
        "wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O conda_installer.sh\n"
      ]
    },
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      "cell_type": "code",
      "execution_count": null,
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        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "4RV_Okw2uJYm",
        "outputId": "f4621e40-0d98-423c-bf66-22c5d144e3cd"
      },
      "outputs": [],
      "source": [
        "%%bash\n",
        "cd /content/f4pga-examples\n",
        "export F4PGA_INSTALL_DIR=~/opt/f4pga\n",
        "export FPGA_FAM=xc7\n",
        "bash conda_installer.sh -u -b -p $F4PGA_INSTALL_DIR/$FPGA_FAM/conda;\n",
        "source \"$F4PGA_INSTALL_DIR/$FPGA_FAM/conda/etc/profile.d/conda.sh\";\n",
        "conda env create -f $FPGA_FAM/environment.yml"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "FBqTs5CsuLb6"
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      "source": [
        "#Download F4PGA Arch Defs\n",
        "%%bash\n",
        "export F4PGA_INSTALL_DIR=~/opt/f4pga\n",
        "export FPGA_FAM=xc7\n",
        "source \"$F4PGA_INSTALL_DIR/$FPGA_FAM/conda/etc/profile.d/conda.sh\";\n",
        "conda activate xc7\n",
        "mkdir -p $F4PGA_INSTALL_DIR/xc7/install\n",
        "\n",
        "F4PGA_TIMESTAMP='20220907-210059'\n",
        "F4PGA_HASH='66a976d'\n",
        "export F4PGA_PACKAGES='install-xc7 xc7a50t_test'\n",
        "\n",
        "for PKG in $F4PGA_PACKAGES; do\n",
        "  wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/continuous/install/${F4PGA_TIMESTAMP}/symbiflow-arch-defs-${PKG}-${F4PGA_HASH}.tar.xz | tar -xJC $F4PGA_INSTALL_DIR/${FPGA_FAM}\n",
        "done"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "EzO5bK_Awg2q"
      },
      "source": [
        "### Compiling with the Toolchain"
      ]
    },
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      "execution_count": null,
      "metadata": {
        "id": "ZnnVzP55uSCL"
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        "#This creates the Makefile\n",
        "with open(\"./content/tmp_code/Makefile\", \"w\") as f:\n",
        "  f.write(\"\"\"current_dir := ${CURDIR}\n",
        "TARGET := basys3\n",
        "\n",
        "TOP := stopwatch_top\n",
        "\n",
        "XDC := ${current_dir}/*.xdc\n",
        "\n",
        "SOURCES := $(wildcard ${current_dir}/*.v ${current_dir}/*.sv)\n",
        "\n",
        "include /content/f4pga-examples/common/common.mk\n",
        "\"\"\")"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "RmnDxe2MuPcG"
      },
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      "source": [
        "#Make the project\n",
        "%%bash\n",
        "export F4PGA_INSTALL_DIR=~/opt/f4pga\n",
        "export FPGA_FAM=xc7\n",
        "export TARGET=basys3\n",
        "source \"$F4PGA_INSTALL_DIR/$FPGA_FAM/conda/etc/profile.d/conda.sh\";\n",
        "conda activate xc7\n",
        "cd ./content\n",
        "make 2> ./error.log 1>./compile.log\n",
        "cp ./build/basys3/*.bit ./stopwatch_top.bit"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "jkKm3WaizMYC"
      },
      "source": [
        "## Testing it on the board"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "l8q3n6CAd5Br"
      },
      "source": [
        "You can use this configuration file and the program openOCD to download the bitstream to your board. You will need to download this file and the bitstream to your local machine."
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "1XrEe8VTuUdg"
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        "#Create File for openocd\n",
        "with open(\"./content/stopwatch_top.cfg\", \"w\") as f:\n",
        "  f.write(\"\"\"interface ftdi\n",
        "ftdi_device_desc \"Digilent USB Device\"\n",
        "ftdi_vid_pid 0x0403 0x6010\n",
        "# channel 1 does not have any functionality\n",
        "ftdi_channel 0\n",
        "# just TCK TDI TDO TMS, no reset\n",
        "ftdi_layout_init 0x0088 0x008b\n",
        "reset_config none\n",
        "adapter_khz 10000\n",
        "\n",
        "source [find cpld/xilinx-xc7.cfg]\n",
        "source [find cpld/jtagspi.cfg]\n",
        "init\n",
        "\n",
        "puts [irscan xc7.tap 0x09]\n",
        "\n",
        "set xc7a35t \"0362D093\"\n",
        "set xc7a100t \"13631093\"\n",
        "set code [drscan xc7.tap 32 0]  \n",
        "puts $code\n",
        "\n",
        "if { $code == $xc7a35t} {\n",
        "    puts \"The board has an xc7a35t\"\n",
        "}\n",
        "\n",
        "if { $code == $xc7a100t} {\n",
        "    puts \"The board has an xc7a100t\"\n",
        "}\n",
        "\n",
        "puts \"Programming...\"\n",
        "pld load 0 stopwatch_top.bit\n",
        "exit\"\"\"\n",
        ")"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "nvYE0S0zd5g-"
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        "#@title Create Zip\n",
        "%%bash\n",
        "cd /content\n",
        "mv Stopwatch/build/basys3/*.bit ./\n",
        "zip stopwatch.zip *.bit *.cfg"
      ]
    }
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