WS85_WebFlasher/flash.html at main · Breezedude/WS85_WebFlasher · GitHub

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<!---
MIT License

Copyright (c) 2025 Breezedude

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
--->

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>WS85 Web Flasher</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: monospace;
      background-color: #f3f4f6;
      color: #1f2937;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2.5rem 1rem;
    }

    .container {
      background-color: #fff;
      padding: 2rem;
      border-radius: 1rem;
      box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      width: 100%;
      max-width: 1400px;
    }

    h1 {
      font-size: 2rem;
      font-weight: bold;
      margin-bottom: 1rem;
      text-align: center;
    }

    label {
      display: block;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    input[type="file"] {
      width: 350px;
      padding: 0.5rem;
      border-radius: 0.5rem;
      border: 1px solid #d1d5db; /* gray-300 */
    }

    button {
      background-color: #2563eb; /* blue-600 */
      color: white;
      font-weight: bold;
      padding: 0.5rem 1.5rem;
      border-radius: 0.75rem;
      margin: 10px;
      border: none;
      cursor: pointer;
      transition: background-color 0.2s;
    }

    button:hover {
      background-color: #1d4ed8; /* blue-700 */
    }

    button:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }

    .progress-wrapper {
      width: 100%;
      height: 1rem;
      background-color: #e5e7eb; /* gray-200 */
      border-radius: 9999px;
      margin-bottom: 1rem;
      overflow: hidden;
    }

    .progress-bar {
      background-color: #10b981; /* green-500 */
      height: 100%;
      width: 0%;
      border-radius: 9999px;
      transition: width 0.2s;
    }

    #terminal {
      background-color: #000;
      color: #22c55e; /* green-400 */
      font-family: monospace;
      font-size: 0.875rem; /* text-sm */
      padding: 0.75rem;
      border-radius: 0.75rem;
      height: 16rem;
      overflow-x: auto; /* allow horizontal scroll */
      overflow-y: auto;
      white-space: pre; /* do not wrap lines */
    }
    #footer {
      text-align: center;
      margin-top: 40px;
      color: #777;
      font-size: 13px;
    }
  </style>
</head>
<body>

  <div class="container">
    <h1>WS85 Web Flasher</h1>

    <div class="mb-4">
      <label for="fileInput">Select WS85 Firmware (.hex) <br><a href="https://www.ecowitt.com/api/quickstart/product?id=308" target="_blank" style="color: #777;">FW available here</a></label>
      <input id="fileInput" type="file" accept=".hex">
    </div>

    <div id="compatWarning" style="
      display:none;
      background-color:#fee2e2;   /* light red */
      color:#b91c1c;              /* dark red */
      border:1px solid #fca5a5;
      padding:0.75rem 1rem;
      border-radius:0.5rem;
      margin:3rem;
      text-align:center;
      font-weight:bold;
    ">
    ⚠️ WebHID is not supported in this browser.<br>
    Please use <strong>Google Chrome</strong>, <strong>Microsoft Edge</strong>, <strong>Brave</strong>, or another Chromium-based browser on desktop.<br>
    For more info visit <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebHID_API">WebHID MDN</a>
    </div>

    <div class="mb-4" style="text-align:center;">
      <button id="flashBtn">Connect & Flash</button>
    </div>

    <div class="progress-wrapper">
      <div id="progressBar" class="progress-bar"></div>
    </div>

    <div id="versionLabels" style="text-align:center; margin-bottom: 1rem;">
    <span id="bootloaderVer" style="font-weight:bold;">Bootloader: -</span>
    &nbsp;&nbsp;|&nbsp;&nbsp;
    <span id="firmwareVer" style="font-weight:bold;">Old Firmware: -</span>
  </div>

    <div id="terminal"></div>

    <div id="footer">
    Breezedude © 2025 - <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-github" viewBox="0 0 16 16">
  <path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27s1.36.09 2 .27c1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.01 8.01 0 0 0 16 8c0-4.42-3.58-8-8-8"/>
</svg>
<a href="https://github.com/Breezedude/WS85_WebFlasher" target="_blank" style="color: #777;">WS85_WebFlasher</a>
  </div>
  </div>


<script>

  window.addEventListener("DOMContentLoaded", () => {
    if (!("hid" in navigator)) {
      const warn = document.getElementById("compatWarning");
      if (warn) warn.style.display = "block";

      // Optionally, disable interaction
      document.getElementById("flashBtn").disabled = true;
      document.getElementById("fileInput").disabled = true;
    }
  });


const VID = 0x1209;
const PID = 0x0021;
const REPORT_SIZE = 64;
const CMD_INIT = 0x01;
const CMD_GET_FW = 0x04;
const CMD_WRITE = 0x22;
const CMD_SET_TARGET = 0x30;
const CMD_FIN1 = 0x33;
const CMD_FIN2 = 0x23;
const CMD_FIN3 = 0x06;
const CMD_UUID = 0x0F;
const ACK_OK = 0x9F;
const FW_RES = 0xA4;
const FIN_OK = 0xA5;
const NACK = 0xDF;

let device;
let firmware = null;

const MAX_TERMINAL_LINES = 100;

function log(msg) {
  const term = document.getElementById('terminal');
  // Split existing content into lines
  let lines = term.textContent.split("\n");
  lines.push(msg); // add new line
  // Keep only the last MAX_TERMINAL_LINES lines
  if (lines.length > MAX_TERMINAL_LINES) {
    lines = lines.slice(lines.length - MAX_TERMINAL_LINES);
  }
  // Update terminal
  term.textContent = lines.join("\n");
  // Scroll to bottom
  term.scrollTop = term.scrollHeight;
}

function formatVersion(num) {
  // Converts numeric version like 116 -> "V1.1.6"
  if (typeof num !== "number") num = parseInt(num);
  if (isNaN(num)) return "V?.?.?";
  const major = Math.floor(num / 100);
  const minor = Math.floor((num % 100) / 10);
  const patch = num % 10;
  return `V${major}.${minor}.${patch}`;
}

// change_label(type, new_number)
// type = "bootloader" or "firmware"
function change_label(type, new_number) {
  const versionText = formatVersion(new_number);
  if (type === "bootloader") {
    document.getElementById("bootloaderVer").textContent =
      `Bootloader: ${versionText}`;
  } else if (type === "firmware") {
    document.getElementById("firmwareVer").textContent =
      `Old Firmware: ${versionText}`;
  }
}

// Remove trailing 0x00 bytes
function trimTrailingZeros(arr) {
  let end = arr.length;
  while (end > 0 && arr[end - 1] === 0x00) {
    end--;
  }
  return arr.slice(0, end);
}


async function sendCommand(cmd, data = [], forceLength = null) {
  const length = forceLength !== null ? forceLength : data.length;
  const payload = new Uint8Array(REPORT_SIZE).fill(0);

  payload[0] = 0x68;      // SOF
  payload[1] = cmd;       // command
  payload[2] = (length >> 8) & 0xff;
  payload[3] = length & 0xff;

  // Copy data starting at byte 4
  payload.set(data, 4);

  // Compute second-last byte (simple sum mod 256)
  let sum = 0;
  for (let i = 0; i < 4 + data.length; i++) sum += payload[i];
  sum &= 0xFF;

  // Append checksum and fixed terminator 0x16
  payload[4 + data.length] = sum;  // second-last byte
  payload[5 + data.length] = 0x16; // last byte

  log(`TX: ${Array.from(payload.slice(0, Math.max(8, 4 + data.length + 2))).map(b => b.toString(16).padStart(2,"0")).join(" ")}`);

  // ---- SEND ----
  await device.sendReport(0, payload);

  // ---- RECEIVE ----
  const event = await new Promise(resolve => {
    const handler = e => {
      device.removeEventListener("inputreport", handler);
      resolve(e);
    };
    device.addEventListener("inputreport", handler);
  });

  const bytes = new Uint8Array(event.data.buffer);
  const header = bytes[0];
  const ack = bytes[1];

  const trimmedBytes = trimTrailingZeros(new Uint8Array(bytes));
  log(`RX: ${Array.from(trimmedBytes).map(b => b.toString(16).padStart(2,"0")).join(" ")}`);
  log(`ACK: 0x${ack.toString(16)}`);

  if (header !== 0x68) throw new Error(`Unexpected header ${header.toString(16)}`);
  if ((ack !== ACK_OK) && (ack !== FW_RES) && (ack !== FIN_OK)) throw new Error(`Bad ACK: ${ack.toString(16)}`);
  if(ack === FW_RES){
    let current_bootloader = (bytes[4] << 8) | bytes[5];
    let current_fw = (bytes[6] << 8) | bytes[7];
    console.log(bytes[5])
    change_label("bootloader", current_bootloader);
    change_label("firmware", current_fw);
  }
}

async function flashFirmware() {
  if (!firmware) { log("No firmware selected."); return; }

    const finalizePayload = await buildFinalizeBlock(firmware);
    console.log(finalizePayload)

  try {
    log("Requesting HID device...");
    device = await navigator.hid.requestDevice({ filters: [{ vendorId: VID, productId: PID }] });
    if (!device || device.length === 0) { log("No device selected."); return; }
    device = device[0];
    await device.open();
    log(`Connected to ${device.productName || "CMSemicon HID ISP"}`);

    // Attach helper promise for HID input
    device.receiveReport = () =>
      new Promise(resolve => {
        const handler = e => {
          device.removeEventListener('inputreport', handler);
          resolve(e);
        };
        device.addEventListener('inputreport', handler);
      });

    log("Sending INIT...");
    await sendCommand(CMD_INIT);
    await sendCommand(CMD_INIT);
    await sendCommand(CMD_INIT); // required 3 times, don't ask
    log("Init OK");

    // Get current FW
    log("Check FW...");
    await sendCommand(CMD_GET_FW);

    // SET_TARGET
    log("Setting Target...");
    await sendCommand(CMD_SET_TARGET, [0x08, 0x00, 0x08, 0x00] );
    log("OK");

    await sendCommand(CMD_FIN3);

    // Write firmware
    const chunkSize = 32;
    let offset = 0;
    const total = firmware.length;
    let lastPct = -1; // track last integer percentage
    log(`Writing ${total} bytes`);

    while (offset < total) {
      const chunk = firmware.slice(offset, offset + chunkSize);
      await sendCommand(CMD_WRITE, chunk);
      offset += chunkSize;

      const pct = Math.floor((offset / total) * 100);
      if (pct !== lastPct) {
        lastPct = pct;
        document.getElementById('progressBar').style.width = pct + '%';
        // force repaint for smoother UX
        await new Promise(r => requestAnimationFrame(r));
      }

    }
    log("Flash complete.");
    document.getElementById('progressBar').style.width = '100%';

    // SET_TARGET
    log("Finishing...");

    await sendCommand(CMD_FIN1, finalizePayload);
    // No idea what this does, but its constant
    await sendCommand(CMD_FIN2, [0x06, 0x00, 0xf5, 0xe0, 0x00, 0x00, 0x00, 0x10] ); // 682300080600f5e0000000107e16
    await sendCommand(CMD_SET_TARGET, [0x08, 0x03, 0xFE, 0x00] );                   // 683000040803fe00a516
    await sendCommand(CMD_FIN3); // 680600006e16
    await sendCommand(CMD_WRITE, [0xce, 0xae, 0x49, 0x31, 0x42, 0x0d, 0x01, 0xf3, 0xef, 0xf6, 0x67, 0xc8, 0x3a, 0x2e, 0x0c, 0x99]); // 68220010ceae4931420d01f3eff667c83a2e0c99 f416
    await sendCommand(CMD_UUID); // 680f00007716

    log("OK");
    log("Update Successful");

  } catch (e) {
    console.error(e);
    log("Error: " + e.message);
  } finally {
    if (device && device.opened) device.close();
    log("Disconnected.");
  }
}

document.getElementById('fileInput').addEventListener('change', async e => {
  const file = e.target.files[0];
  if (!file) return;

  try {
    // Read file as text
    const text = await file.text();
    console.log("HEX preview:", text.slice(0, 64));

    // Parse HEX into contiguous firmware bytes
    firmware = parseIntelHexContiguous(text);

    log(`Loaded ${firmware.length} bytes from ${file.name}`);
    console.log("Firmware preview:", firmware.slice(0, 32));

  } catch (err) {
    console.error("Failed to load HEX file:", err);
    log("Error loading HEX: " + err.message);
  }
});


// --- Parser that ignores addresses and returns contiguous bytes ---
function parseIntelHexContiguous(data) {
  const firmware = [];

  data = data.replace(/\r\n/g, "\n"); // normalize line endings
  const lines = data.split("\n");

  for (let lineNum = 0; lineNum < lines.length; lineNum++) {
    const line = lines[lineNum].trim();
    if (!line) continue;
    if (line[0] !== ":") throw new Error(`Line ${lineNum + 1} does not start with ':'`);

    const byteCount = parseInt(line.substr(1, 2), 16);
    const recordType = parseInt(line.substr(7, 2), 16);
    const dataField = line.substr(9, byteCount * 2);
    const checksum = parseInt(line.substr(9 + byteCount * 2, 2), 16);

    const dataBytes = byteCount > 0
      ? Array.from(dataField.match(/.{2}/g).map(b => parseInt(b, 16)))
      : [];

    // Verify checksum
    let sum = byteCount + parseInt(line.substr(3,2),16) + parseInt(line.substr(5,2),16) + recordType;
    for (let b of dataBytes) sum += b;
    sum = (sum + checksum) & 0xFF;
    if (sum !== 0) throw new Error(`Checksum error on line ${lineNum + 1}`);

    switch (recordType) {
      case 0x00: // Data record
        firmware.push(...dataBytes);
        break;
      case 0x01: // End of file
        return new Uint8Array(firmware);
      case 0x04: // Extended linear address, ignore
      default:
        break;
    }
  }

  throw new Error("Missing EOF record in HEX file");
}

  async function buildFinalizeBlock(firmware) {
    const size = firmware.length;

    // Calculate 32-bit additive checksum (sum of 16-bit words)
    let sum = 0;
    for (let i = 0; i < firmware.length; i++){
      sum = (sum + firmware[i]) >>> 0; // 32-bit wrap
    }

    const toBE = v => [24,16,8,0].map(s => (v >> s) & 0xFF);
    const sizeBytes = toBE(size);
    const sumBytes  = toBE(sum);

    // Return combined payload
    return sizeBytes.concat(sumBytes);
  }

  document.getElementById('flashBtn').addEventListener('click', flashFirmware);
</script>
</body>
</html>