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tushar11khtushar11kh
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feat: added usb transfer functionality(Android only support)
1 parent 9e5b0a3 commit 5ed638a

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14 files changed

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-402
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14 files changed

+1268
-402
lines changed

‎android/app/src/main/AndroidManifest.xml‎

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@@ -1,4 +1,5 @@
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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<uses-feature android:name="android.hardware.usb.host" />
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<application
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android:label="Badge Magic"
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android:name="${applicationName}"
@@ -15,6 +16,14 @@
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the Android process has started. This theme is visible to the user
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while the Flutter UI initializes. After that, this theme continues
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to determine the Window background behind the Flutter UI. -->
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<intent-filter>
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<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
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</intent-filter>
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<meta-data
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android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
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android:resource="@xml/device_filter" />
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<meta-data
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android:name="io.flutter.embedding.android.NormalTheme"
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android:resource="@style/NormalTheme"

‎android/app/src/main/res/xml/device_filter.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<resources>
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<!-- FOSSASIA BadgeMagic - badgemagic firmware (transfer) -->
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<usb-device vendor-id="4348" product-id="55200" /> <!-- 0x10FC, 0x55E0 -->
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<!-- FOSSASIA BadgeMagic - rust badgemagic (bootloader)-->
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<usb-device vendor-id="1046" product-id="20512" /> <!-- 0x0416, 0x5020 -->
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</resources>

‎lib/bademagic_module/usb/payload_builder.dart‎

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import 'package:badgemagic/bademagic_module/bluetooth/datagenerator.dart';
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/// Builds USB CDC payloads from Badge data.
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/// Same format as BLE, but split into 64-byte chunks.
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class PayloadBuilder {
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final DataTransferManager manager;
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PayloadBuilder({required this.manager});
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Future<List<List<int>>> buildPayloads() async {
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// Generate the raw payload using the existing BLE generator
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final rawChunks = await manager.generateDataChunk();
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// Flatten because BLE uses 16-byte chunks
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final flat = rawChunks.expand((c) => c).toList();
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// Split into 64-byte chunks for USB CDC
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final usbChunks = <List<int>>[];
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for (int i = 0; i < flat.length; i += 64) {
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usbChunks.add(
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flat.sublist(i, i + 64 > flat.length ? flat.length : i + 64),
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);
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}
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return usbChunks;
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}
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}

‎lib/bademagic_module/usb/usb_cdc.dart‎

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import 'dart:typed_data';
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import 'package:logger/Logger.dart';
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import 'package:usb_serial/usb_serial.dart';
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/// Wrapper around usb_serial for BadgeMagic devices
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class UsbCdc {
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final logger = Logger();
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UsbPort? _port;
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// FOSSASIA BadgeMagic Device IDs - BOTH MODES
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static const int normalVendorId = 4348; // 0x10FC - Normal mode
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static const int normalProductId = 55200; // 0x55E0 - Normal mode
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static const int bootloaderVendorId = 1046; // 0x0416 - Bootloader mode
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static const int bootloaderProductId = 20512; // 0x5020 - Bootloader mode
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/// Open the first available FOSSASIA USB device
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Future<bool> openDevice() async {
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final devices = await listDevices();
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// Filter for FOSSASIA badges - BOTH MODES
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final fossasiaDevices = devices
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.where((device) =>
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(device.vid == normalVendorId && device.pid == normalProductId) ||
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(device.vid == bootloaderVendorId &&
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device.pid == bootloaderProductId))
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.toList();
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if (fossasiaDevices.isEmpty) {
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logger.e("No FOSSASIA badge found. Available devices: $devices");
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return false;
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}
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final device = fossasiaDevices.first;
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logger.d("Found FOSSASIA device: ${device.vid}:${device.pid}");
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// BOOTLOADER DETECTION
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if (device.vid == bootloaderVendorId && device.pid == bootloaderProductId) {
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logger.e("Device is in bootloader mode - cannot transfer data");
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throw Exception(
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"Device is in bootloader mode. Please disconnect, then connect without holding any buttons.");
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}
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_port = await device.create();
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if (_port == null) {
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logger.e("Failed to create USB port");
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return false;
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}
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final opened = await _port!.open();
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if (!opened) {
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logger.e("Failed to open USB port");
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return false;
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}
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await _port!.setPortParameters(
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115200,
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UsbPort.DATABITS_8,
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UsbPort.STOPBITS_1,
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UsbPort.PARITY_NONE,
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);
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logger.d("USB device opened successfully");
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return true;
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}
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/// Write data to the USB port
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Future<void> write(List<int> data) async {
68+
if (_port == null) throw Exception("USB port not open");
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try {
71+
await _port!.write(Uint8List.fromList(data));
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logger.d("USB chunk written: ${data.length} bytes");
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} catch (e) {
74+
logger.e("Failed to write USB chunk: $e");
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rethrow;
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}
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}
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/// Close the USB port
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Future<void> close() async {
81+
try {
82+
await _port?.close();
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logger.d("USB port closed");
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} catch (e) {
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logger.e("Error closing USB port: $e");
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}
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}
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/// List connected USB devices with better logging
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Future<List<UsbDevice>> listDevices() async {
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try {
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final devices = await UsbSerial.listDevices();
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logger.d(
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"USB devices found: ${devices.map((d) => 'VID:${d.vid?.toRadixString(16)} PID:${d.pid?.toRadixString(16)}').toList()}");
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return devices;
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} catch (e) {
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logger.e("Error listing USB devices: $e");
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return [];
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}
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}
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/// Helper to check if any FOSSASIA device is connected
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Future<bool> isFossasiaDeviceConnected() async {
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final devices = await listDevices();
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return devices.any((device) =>
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(device.vid == normalVendorId && device.pid == normalProductId) ||
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(device.vid == bootloaderVendorId &&
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device.pid == bootloaderProductId));
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}
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}

‎lib/bademagic_module/usb/usb_scan_state.dart‎

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// usb_scan_state.dart
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import 'dart:async';
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import 'package:badgemagic/bademagic_module/bluetooth/base_ble_state.dart';
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import 'package:badgemagic/bademagic_module/usb/payload_builder.dart';
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import 'package:badgemagic/bademagic_module/usb/usb_cdc.dart';
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import 'package:badgemagic/bademagic_module/bluetooth/completed_state.dart';
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import 'package:badgemagic/bademagic_module/usb/usb_write_state.dart';
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/// USB scan state (mirrors ScanState for BLE)
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class UsbScanState extends NormalBleState {
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final PayloadBuilder builder;
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UsbScanState({required this.builder});
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@override
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Future<BleState?> processState() async {
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final usb = UsbCdc();
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toast.showToast("Searching for USB device...");
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try {
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final devices =
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await usb.listDevices(); // wrapper for UsbSerial.listDevices()
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final fossasiaDevices = devices
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.where((device) => device.vid == 0x0416 && device.pid == 0x5020)
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.toList();
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if (fossasiaDevices.isEmpty) {
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toast.showErrorToast("No FOSSASIA badge found");
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return CompletedState(
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isSuccess: false, message: "No FOSSASIA USB device found");
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}
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toast.showToast("USB device found. Preparing transfer...");
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// Directly pass to UsbWriteState
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final writeState = UsbWriteState(builder: builder);
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return await writeState.process();
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} catch (e) {
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logger.e("USB scan error: $e");
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toast.showErrorToast("USB scan failed: $e");
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return CompletedState(isSuccess: false, message: "USB scan failed: $e");
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}
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}
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}

‎lib/bademagic_module/usb/usb_write_state.dart‎

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import 'package:badgemagic/bademagic_module/bluetooth/base_ble_state.dart';
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import 'package:badgemagic/bademagic_module/bluetooth/completed_state.dart';
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import 'package:badgemagic/bademagic_module/usb/payload_builder.dart';
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import 'package:badgemagic/bademagic_module/usb/usb_cdc.dart';
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import 'package:badgemagic/bademagic_module/utils/toast_utils.dart';
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import 'package:flutter/foundation.dart'; // for kIsWeb, Platform checks
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import 'dart:io' show Platform;
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import 'package:flutter/services.dart'; // for MissingPluginException
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class UsbWriteState extends NormalBleState {
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final PayloadBuilder builder;
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UsbWriteState({required this.builder});
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@override
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Future<BleState?> processState() async {
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// Unsupported platforms (macOS, Web, etc.)
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if (!Platform.isAndroid) {
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toast.showErrorToast("USB transfer not supported on this platform");
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return CompletedState(isSuccess: false, message: "Unsupported platform");
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}
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final usb = UsbCdc();
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try {
25+
bool opened;
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try {
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opened = await usb.openDevice();
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} on MissingPluginException catch (_) {
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toast.showErrorToast(
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"USB plugin not available. Please ensure the plugin is installed and platform supports USB.",
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);
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throw Exception("USB plugin missing or not registered");
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}
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if (!opened) {
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toast.showErrorToast("No BadgeMagic USB device found");
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throw Exception("No USB device connected");
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}
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final dataChunks = await builder.buildPayloads();
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logger.d("USB payload chunks: ${dataChunks.length}");
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for (final chunk in dataChunks) {
44+
bool success = false;
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for (int attempt = 1; attempt <= 3; attempt++) {
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try {
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await usb.write(chunk);
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logger.d("USB chunk written: $chunk");
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success = true;
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break;
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} catch (e) {
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logger.e("USB write failed (attempt $attempt/3): $e");
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}
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}
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if (!success) {
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toast.showErrorToast("Failed to transfer data over USB");
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throw Exception("USB transfer failed");
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}
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await Future.delayed(const Duration(milliseconds: 20));
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}
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toast.showToast("USB transfer completed successfully");
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return CompletedState(isSuccess: true, message: "USB transfer complete");
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} catch (e) {
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logger.e("USB transfer error: $e");
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if (e.toString().contains("MissingPluginException")) {
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// Already handled above; no need to show extra toast
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} else if (e.toString().contains("No USB device connected")) {
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// Already shown toast above
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} else {
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toast.showErrorToast("USB transfer failed: ${e.toString()}");
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}
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throw e;
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} finally {
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await usb.close();
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}
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}
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}

‎lib/constants.dart‎

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@@ -8,6 +8,11 @@ const drawBadgeScreen = "bm_db_screen";
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const savedClipartScreen = "bm_sc_screen";
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const savedBadgeScreen = "bm_sb_screen";
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enum ConnectionType {
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bluetooth,
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usb,
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}
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//Colors used in the app
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// Primary Colors
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const Color colorPrimary = Color(0xFFD32F2F);

‎lib/main.dart‎

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import 'package:provider/provider.dart';
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import 'globals/globals.dart' as globals;
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import 'services/localization_service.dart';
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import 'package:badgemagic/providers/transfer_provider.dart';
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Future<void> main() async {
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setupLocator();
@@ -47,7 +48,9 @@ Future<void> main() async {
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ChangeNotifierProvider<FontProvider>(
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create: (context) => getIt<FontProvider>()),
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ChangeNotifierProvider<BadgeScanProvider>(
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create: (_) => getIt<BadgeScanProvider>(),
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create: (_) => getIt<BadgeScanProvider>()),
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ChangeNotifierProvider<TransferProvider>(
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create: (context) => TransferProvider(), // Create a new instance
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),
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],
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child: const MyApp(),

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