一、引用
二、截圖
廢話不多說,先上圖,micro usb -> usb 連接的測試溫度的外設(其實是個測試糧油品質的,還有TPM值等等)
三、流程
1、mainfest中註冊監聽USB拔插動作並且過濾對應vid,pid的設備。這個是靜態的,在下面實例中用的是動態的,具體可以參考引用中的第【2】個。
2、查找所有的USB設備
3、動態註冊需要用的USB設備權限
4、連接已註冊的USB設備,並設置連接參數
5、設置返回監聽,並對話
6、按照不同的協議解析byte[]數據獲得對應數據(在此不表)
7、關閉連接等
四、代碼
0、配置:git上的案例,把其中usbSerialForAndroid的這個module拿下來,關聯到自己的工程上面去
build.gradle-app
dependencies {
compile project(':usbSerialForAndroid')
}
settings.gradle
include ':app', 'usbSerialForAndroid'
1、動態監聽USB拔插動作+USB註冊動作
private String USB_PERMISSION = "xxxxxxxxxx.usb.permission";
private PendingIntent mPrtPermissionIntent; //獲取外設權限的意圖
/**
* 動態註冊usb廣播,拔插動作,註冊動作
* */
private void register(){
//註冊在此service下的receiver的監聽的action
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
intentFilter.addAction(UsbManager.ACTION_USB_ACCESSORY_ATTACHED);
intentFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
intentFilter.addAction(USB_PERMISSION);
registerReceiver(usbReceiver, intentFilter);//註冊receiver
//通知監聽外設權限註冊狀態
//PendingIntent:連接外設的intent
//ask permission
mPrtPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(USB_PERMISSION), 0);
}
private BroadcastReceiver usbReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent == null) {
return;
}
String action = intent.getAction();
// USB註冊動作
if (USB_PERMISSION.equals(action)) {
synchronized (this) {
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
if ((UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE) != null) {
// usbDev = (UsbDevice)
// intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
// after request dev permission and granted
// pemission , connect printer by usb
LogUtil.i("after request dev permission and granted pemission , connect printer by usb.");
getUsbInfo(mUsbSerialPort.getDriver().getDevice());
} else {
LogUtil.e("usb device suddenly disappera.");
ToastUtil.showShort(instance,"USB外設意外消失。");
}
} else {
LogUtil.e("usb permission granted fail.");
ToastUtil.showShort(instance, "USB權限註冊失敗。");
}
}
}
// USB拔插動作
else if(UsbManager.ACTION_USB_ACCESSORY_ATTACHED.equals(action)
|| UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)){
LogUtil.i("USB 插入...");
search();
}
}
};
2、查詢所有USB設備
//查詢設備
private void search(){
usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
List<UsbSerialDriver> drivers =
UsbSerialProber.getDefaultProber().findAllDrivers(usbManager);
//try get enable printer dev
if (drivers.size() > 0) {
usbDevicesList.clear();
for(UsbSerialDriver driver : drivers){
usbDevicesList.addAll(driver.getPorts());
}
adapter.notifyDataSetChanged();
}else{
LogUtil.e("not find device.");
return;
}
}
3、動態註冊需要用的USB設備權限(會走到1中的receiver中)
@Override
public void onItemClick(View view, int position) {
mUsbSerialPort = usbDevicesList.get(position);
RequestNormalPermission(usbManager, mUsbSerialPort.getDriver().getDevice());
}
/**
* 請求權限:一般來說有彈框
*/
public void RequestNormalPermission(UsbManager usbManager,UsbDevice device) {
if (!usbManager.hasPermission(device)) {
// ask has dev permission,pop dialog
LogUtil.d("printer dev has no permission,try request it.");
ToastUtil.showShort(this,"printer dev has no permission,try request it.");
usbManager.requestPermission(device, mPrtPermissionIntent);// will recall mReceiver
} else {
// when dev has granted permission , connect printer by usb
LogUtil.d("printer dev has granted permission,connect usb.");
ToastUtil.showShort(this, "USB權限註冊成功。");
getUsbInfo(mUsbSerialPort.getDriver().getDevice());
}
}
4、連接已註冊的USB設備,並設置連接參數 + 5、設置返回監聽,並對話 + 7、關閉連接等
/**
* 獲得授權USB的基本信息
* 1、USB接口,一般是第一個
* 2、USB設備的輸入輸出端
*
* */
private void getUsbInfo(UsbDevice usbDevice){
StringBuilder sb = new StringBuilder();
if(Build.VERSION.SDK_INT >= 23){
sb.append(String.format("VID:%04X PID:%04X ManuFN:%s PN:%s V:%s",
usbDevice.getVendorId(),
usbDevice.getProductId(),
usbDevice.getManufacturerName(),
usbDevice.getProductName(),
usbDevice.getVersion()
));
}
else if(Build.VERSION.SDK_INT >= 21){
sb.append(String.format("VID:%04X PID:%04X ManuFN:%s PN:%s",
usbDevice.getVendorId(),
usbDevice.getProductId(),
usbDevice.getManufacturerName(),
usbDevice.getProductName()
));
}
else{
sb.append(String.format("VID:%04X PID:%04X",
usbDevice.getVendorId(),
usbDevice.getProductId()
));
}
tv_usb.setText(sb.toString());
connect();//連接
}
/**
* usb設備的連接
* */
private void connect(){
LogUtil.i("usb connect...");
usbDeviceConnection = null;
usbDeviceConnection = usbManager.openDevice(mUsbSerialPort.getDriver().getDevice());
if(usbDeviceConnection == null){
ll_usb_connect.setVisibility(View.GONE);
tv_usb.setText(tv_usb.getText().toString() + " 連接失敗!!!");
}else{
tv_usb.setText(tv_usb.getText().toString() + " 連接成功。");
ll_usb_connect.setVisibility(View.VISIBLE);
tv_connect_state.setText("USB通信");
tv_receive.setText("");
et_send.setText("01 03 00 01 00 01 D5 CA");
setConnectionParam();
onDeviceStateChange();
}
}
/**
* 設置通訊參數
* */
private void setConnectionParam(){
try {
if(mUsbSerialPort.getDriver().getDevice().getInterfaceCount() > 0){
mUsbSerialPort.open(usbDeviceConnection);
mUsbSerialPort.setParameters(115200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE);
StringBuilder sb = new StringBuilder();
sb.append( "\n CD - Carrier Detect = "+mUsbSerialPort.getCD());
sb.append( "\n CTS - Clear To Send = "+mUsbSerialPort.getCTS());
sb.append( "\n DSR - Data Set Ready = "+mUsbSerialPort.getDSR());
sb.append( "\n DTR - Data Terminal Ready = "+mUsbSerialPort.getDTR());
sb.append( "\n DSR - Data Set Ready = "+mUsbSerialPort.getDSR());
sb.append( "\n RI - Ring Indicator = "+mUsbSerialPort.getRI());
sb.append( "\n RTS - Request To Send = "+mUsbSerialPort.getRTS());
tv_connect_state.setText(sb.toString());
try {
mUsbSerialPort.setDTR(true);
}catch (IOException x){
LogUtil.e("IOException DTR: " + x.getMessage());
}
try {
mUsbSerialPort.setRTS(true);
}catch (IOException x){
LogUtil.e("IOException RTS: " + x.getMessage());
}
}
//無通訊接口
else{
tv_connect_state.setText("該USB無通訊接口");
}
} catch (IOException e) {
LogUtil.e("Error setting up device: " + e.getMessage());
tv_connect_state.setText("Error opening device: " + e.getMessage());
try {
mUsbSerialPort.close();
} catch (IOException e2) {
// Ignore.
}
mUsbSerialPort = null;
return;
}
}
public boolean sendData(byte[] data) {
LogUtil.i("sendData:"+Arrays.toString(data));
if (mSerialIoManager != null) {
mSerialIoManager.writeAsync(data);
}
return false;
}
private final SerialInputOutputManager.Listener mListener =
new SerialInputOutputManager.Listener() {
@Override
public void onRunError(Exception e) {
LogUtil.d("Runner stopped.");
}
@Override
public void onNewData(final byte[] data) {
LogUtil.i("onReceiver data="+Arrays.toString(data));
instance.runOnUiThread(new Runnable() {
@Override
public void run() {
tv_receive.setText(HexUtil.bytesToHexString(data));
}
});
}
};
/**
* usb設備斷開連接
* */
private void disconnect(){
LogUtil.e("usb disconnect...");
stopIoManager();
if (mUsbSerialPort != null) {
try {
mUsbSerialPort.close();
} catch (IOException e) {
// Ignore.
}
mUsbSerialPort = null;
}
//usbdevice usbmanager
}
private void stopIoManager() {
if (mSerialIoManager != null) {
LogUtil.i("Stopping io manager ..");
mSerialIoManager.stop();
mSerialIoManager = null;
}
}
private void startIoManager() {
if (mSerialIoManager == null) {
LogUtil.i("Starting io manager ..");
mSerialIoManager = new SerialInputOutputManager(mUsbSerialPort, mListener);
mExecutor.submit(mSerialIoManager);
}
}
private void onDeviceStateChange() {
stopIoManager();
startIoManager();
}
@Override
public void onDestroy() {
unregisterReceiver(usbReceiver);
usbReceiver = null;
disconnect();
super.onDestroy();
}
五、其他
參數意義
1 載波檢測 DCD(Data Carrier Detect)
2 接收數據 RXD(Received Data)
3 發送數據 TXD(Transmit Data)
4 數據終端準備好 DTR(Data Terminal Ready)
5 信號地 SG(Signal Ground)
6 數據準備好 DSR(Data Set Ready)
7 請求發送 RTS(Request To Send)
8 清除發送 CTS(Clear To Send)
9 振鈴提示 RI(Ring Indicator)
支持USB芯片種類
1、CDC ACM
2、CH34X
3、CP21XX
4、FTDI
5、Common USB
波特率參數等
這裏是寫死的,具體得看設備