feat(led): add rk3588 lvgl display backend

lib/led.js

@@ -11,7 +11,7 @@ function loadImpl() {
   if (forced) {
     name = forced;
   } else if (isRK3588()) {
-    name = 'noop';
+    name = 'rk3588-lvgl';
   } else if (isRK3566()) {
     name = 'rk3566';
   } else {
@@ -23,6 +23,10 @@ function loadImpl() {
       log.info('led', `LED/VFD backend → rk3566-openvfd (${model || 'unknown model'})`);
       return require('./led/rk3566-openvfd');
     }
+    if (name === 'rk3588-lvgl' || name === '3588' || name === 'rk3588') {
+      log.info('led', `LED/VFD backend → rk3588-lvgl (${model || 'unknown model'})`);
+      return require('./led/rk3588-lvgl');
+    }
     if (name === 'noop' || name === 'none' || name === 'off') {
       log.info('led', `LED/VFD backend → noop (${model || 'unknown model'})`);
       return require('./led/noop');

lib/led/rk3588-lvgl.js

@@ -0,0 +1,81 @@
+'use strict';
+
+const fs = require('fs');
+const log = require('../logger');
+
+const LVGL_CMD_FIFO = process.env.CLAWD_LVGL_CMD_FIFO || '/tmp/lvgl_cmd';
+
+function writeLvglCommand(command) {
+  try {
+    const fd = fs.openSync(LVGL_CMD_FIFO, fs.constants.O_WRONLY | fs.constants.O_NONBLOCK);
+    fs.writeSync(fd, `${command}\n`);
+    fs.closeSync(fd);
+    return true;
+  } catch (e) {
+    log.warn('display', `lvgl cmd failed (${command}): ${e.message}`);
+    return false;
+  }
+}
+
+class BasicLed {
+  constructor(name) {
+    this.name = name;
+    this._current = null;
+  }
+  on() { this._current = 'on'; log.debug('led', `[rk3588-lvgl] ${this.name} on`); }
+  off() { this._current = 'off'; log.debug('led', `[rk3588-lvgl] ${this.name} off`); }
+  blink() { this._current = 'blink'; log.debug('led', `[rk3588-lvgl] ${this.name} blink`); }
+  destroy() { this._current = 'off'; log.debug('led', `[rk3588-lvgl] ${this.name} destroy`); }
+}
+
+class StatusLed {
+  setSetup() { log.debug('led', '[rk3588-lvgl] status setup'); }
+  setApps() { log.debug('led', '[rk3588-lvgl] status apps'); }
+  off() { log.debug('led', '[rk3588-lvgl] status off'); }
+}
+
+class Display {
+  showAP() {
+    if (writeLvglCommand('show_text:AP')) {
+      log.info('display', '显示屏 → AP');
+    }
+  }
+
+  showConn() {
+    if (writeLvglCommand('show_text:Conn')) {
+      log.info('display', '显示屏 → Conn');
+    }
+  }
+
+  showErr0() {
+    if (writeLvglCommand('show_text:Err0')) {
+      log.info('display', '显示屏 → Err0');
+    }
+  }
+
+  showTime() {
+    if (writeLvglCommand('show_time')) {
+      log.info('display', '显示屏 → 时间');
+    }
+  }
+
+  showPin(pin) {
+    const s = String(pin || '').padStart(4, '0').slice(-4);
+    if (writeLvglCommand(`show_text:${s}`)) {
+      log.info('display', `显示屏 → PIN: ${s}`);
+    }
+  }
+}
+
+class LanLed {
+  start() { log.debug('led', '[rk3588-lvgl] LAN start ignored'); }
+  stop() { log.debug('led', '[rk3588-lvgl] LAN stop ignored'); }
+}
+
+const led = new BasicLed('wifi');
+led.bt = new BasicLed('bt');
+led.status = new StatusLed();
+led.display = new Display();
+led.lan = new LanLed();
+
+module.exports = led;