initial commit
This commit is contained in:
111
app.py
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111
app.py
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#!/usr/bin/env python3
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from flask import Flask, request, jsonify, send_from_directory
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import subprocess
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import re
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import os
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app = Flask(__name__)
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TYPE_TO_GDB_FMT = {
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"int8": "db",
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"uint8": "dub",
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"int16": "dh",
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"uint16": "duh",
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"int32": "dw",
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"uint32": "duw",
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"float": "f",
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"double": "g",
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}
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def run_gdb_once(gdb_path, target, addr, length, data_type):
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if data_type not in TYPE_TO_GDB_FMT:
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raise ValueError(f"Unsupported type '{data_type}'")
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fmt = TYPE_TO_GDB_FMT[data_type]
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# Build gdb command:
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# gdb -q --nx -ex "target remote ..." -ex "x/<len><fmt> <addr>" -ex "quit"
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examine_cmd = f"x/{length}{fmt} {addr}"
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result = subprocess.run(
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[
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gdb_path,
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"--quiet",
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"--nx",
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"-ex", f"target remote {target}",
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"-ex", examine_cmd,
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"-ex", "quit",
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],
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capture_output=True,
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text=True,
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)
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if result.returncode != 0:
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raise RuntimeError(
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f"GDB exited with code {result.returncode}:\n{result.stderr or result.stdout}"
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)
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return result.stdout.splitlines()
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def parse_values(lines, data_type):
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values = []
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line_re = re.compile(r"^0x[0-9a-fA-F]+:\s*(.*)$")
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for line in lines:
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line = line.strip()
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m = line_re.match(line)
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if not m:
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continue
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rest = m.group(1)
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tokens = rest.split()
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for t in tokens:
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try:
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if data_type in ("float", "double"):
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v = float(t)
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else:
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v = int(t, 10)
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values.append(v)
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except ValueError:
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pass
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return values
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@app.route("/")
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def index():
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return send_from_directory(os.path.dirname(__file__), "index.html")
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@app.route("/api/read_memory", methods=["POST"])
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def read_memory():
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data = request.get_json(force=True)
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gdb_path = data.get("gdb_path", "arm-none-eabi-gdb")
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target = data.get("target", "localhost:3333")
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addr = data.get("addr")
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length = data.get("length")
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data_type = data.get("type")
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if addr is None or length is None or data_type is None:
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return jsonify({"error": "addr, length, and type are required"}), 400
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try:
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length = int(length)
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except ValueError:
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return jsonify({"error": "length must be an integer"}), 400
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try:
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lines = run_gdb_once(gdb_path, target, addr, length, data_type)
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values = parse_values(lines, data_type)
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if len(values) > length:
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values = values[:length]
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return jsonify({
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"addr": addr,
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"length": length,
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"type": data_type,
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"values": values,
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})
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except Exception as e:
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return jsonify({"error": str(e)}), 500
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if __name__ == "__main__":
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# For dev only — behind firewall, not on the open internet.
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app.run(host="127.0.0.1", port=5000, debug=True)
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141
index.html
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141
index.html
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>MCU Memory Plotter</title>
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<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
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<style>
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body {
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font-family: sans-serif;
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margin: 20px;
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}
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form {
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margin-bottom: 20px;
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}
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label {
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display: inline-block;
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width: 80px;
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}
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input, select {
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margin-bottom: 8px;
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}
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#error {
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color: red;
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margin-top: 10px;
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}
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</style>
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</head>
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<body>
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<h1>MCU Memory Plotter</h1>
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<form id="memForm">
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<div>
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<label for="addr">Address</label>
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<input type="text" id="addr" value="0x20000000" required>
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</div>
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<div>
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<label for="length">Length</label>
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<input type="number" id="length" value="128" required>
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</div>
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<div>
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<label for="type">Type</label>
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<select id="type">
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<option value="int8">int8</option>
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<option value="uint8">uint8</option>
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<option value="int16">int16</option>
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<option value="uint16">uint16</option>
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<option value="int32">int32</option>
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<option value="uint32">uint32</option>
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<option value="float" selected>float</option>
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<option value="double">double</option>
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</select>
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</div>
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<div>
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<label for="target">Target</label>
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<input type="text" id="target" value="localhost:3333">
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</div>
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<div>
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<label for="gdb">GDB</label>
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<input type="text" id="gdb" value="arm-none-eabi-gdb">
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</div>
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<button type="submit">Read & Plot</button>
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</form>
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<div id="error"></div>
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<canvas id="chart" width="800" height="400"></canvas>
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<script>
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const ctx = document.getElementById('chart').getContext('2d');
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let chart = null;
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document.getElementById('memForm').addEventListener('submit', async (e) => {
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e.preventDefault();
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document.getElementById('error').textContent = "";
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const addr = document.getElementById('addr').value;
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const length = parseInt(document.getElementById('length').value, 10);
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const type = document.getElementById('type').value;
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const target = document.getElementById('target').value;
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const gdb = document.getElementById('gdb').value;
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try {
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const res = await fetch('/api/read_memory', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({
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addr: addr,
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length: length,
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type: type,
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target: target,
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gdb_path: gdb
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})
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});
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const data = await res.json();
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if (!res.ok) {
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throw new Error(data.error || "Unknown error");
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}
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const values = data.values || [];
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const labels = values.map((_, i) => i);
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if (chart) {
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chart.destroy();
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}
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chart = new Chart(ctx, {
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type: 'line',
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data: {
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labels: labels,
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datasets: [{
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label: `Memory at ${data.addr} (${data.type})`,
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data: values,
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}]
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},
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options: {
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responsive: true,
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scales: {
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x: {
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title: {
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display: true,
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text: 'Index'
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}
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},
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y: {
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title: {
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display: true,
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text: 'Value'
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}
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}
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}
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}
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});
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} catch (err) {
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document.getElementById('error').textContent = err.message;
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}
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});
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</script>
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</body>
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</html>
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