RS232串口通信 基于ZE613

串口通信 基于ZE613"/>

RS232串口通信 基于ZE613

在网上看到了很多RS232串口操作的讲解，发现基本都是root了，但是在实际开发应用中，这个还有有很多限制的，下面是在非root的情况下，使用基于ZE_613设备RS232串口通信的一些使用情况。

（一）RS232标准接口 （这里是借鉴的.html#wiz_toc_1）
也就是PC电脑上所说的COM口，RS232是负逻辑电平，它定义+5_{+12V为低电平，而-12}-5V为高电平。

正常情况下，PC台式主机机箱都会有一个RS232的通讯接口（别和VGI的口搞错啦！），而目前笔记本几乎不会带有了，所以都是用USB转接口。

UART
及Universal Asynchronous Receiver Transmitter：通用异步收发器，通常ARM嵌入式板子都会集成此接口

UART有4个pin（VCC, GND, RX, TX）, 用的TTL电平, 低电平为0(0V)，高电平为1（3.3V或以上）。

RS232与UART转接
通常嵌入式里所说的串口，是指UART口，但硬件众多，大多数都是基于RS232和UART，有时候这两种口之间需要通讯，最主要不同的其实也就是电平不一样，所以需要转接口，某宝上MAX3232种类繁多。

（二）RS232 Android开发
这里是源代码地址：

1、添加权限

<uses-feature android:name="android.hardware.usb.host" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

如果是7.0以上的手机，对于读写权限需要自己处理，网上很多，这里就不介绍了

2、在需要使用RS232串口的界面添加下面代码

<activity android:name=".MainActivity"android:launchMode="singleTask"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter><intent-filter><action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" /></intent-filter><meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"android:resource="@xml/device_filter" /></activity>

3、在res下新建device_filter.xml文件

<resources><usb-device vendor-id="1118" product-id="688"></usb-device>  <usb-device vendor-id="1027" product-id="24577" /> <!-- FT232RL --><usb-device vendor-id="1027" product-id="24596" /> <!-- FT232H --><usb-device vendor-id="1027" product-id="24592" /> <!-- FT2232C/D/HL --><usb-device vendor-id="1027" product-id="24593" /> <!-- FT4232HL --><usb-device vendor-id="1027" product-id="24597" /> <!-- FT230X --><usb-device vendor-id="1412" product-id="45088" /> <!-- REX-USB60F -->
</resources>

3、在libs中导入包d2xx.jar，因为这里是用的是Z-TEK厂家的
（ps----我也怕厂家追究我盗用他们的版权）

首先对包进行初始化：

try {ftD2xx = D2xxManager.getInstance(this);} catch (D2xxManager.D2xxException ex) {ex.printStackTrace();}

然后设置vid、pid

if(!ftD2xx.setVIDPID(0x0403, 0x6001))Log.i("ftd2xx-java","setVIDPID Error");        

开启广播

IntentFilter filter = new IntentFilter();filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);filter.setPriority(500);this.registerReceiver(mUsbReceiver, filter);

检测设备

int tempDevCount = ftD2xx.createDeviceInfoList(this);if (tempDevCount > 0) {if( DevCount != tempDevCount ) {DevCount = tempDevCount;}} else {DevCount = -1;currentIndex = -1;}

连接设备

int tmpProtNumber = openIndex + 1;if( currentIndex != openIndex ) {if(null == ftDev) {try {ftDev = ftD2xx.openByIndex(this, openIndex);} catch (Exception e){ftDev = null;}} else {synchronized(ftDev) {ftDev = ftD2xx.openByIndex(this, openIndex);}}uart_configured = false;} else {Toast.makeText(this,"Device port " + tmpProtNumber + " is already opened",Toast.LENGTH_LONG).show();return;}if(ftDev == null) {Toast.makeText(this,"open device port("+tmpProtNumber+") NG, ftDev == null", Toast.LENGTH_LONG).show();return;}if (true == ftDev.isOpen()) {currentIndex = openIndex;Toast.makeText(this, "open device port(" + tmpProtNumber + ") OK", Toast.LENGTH_SHORT).show();if(false == bReadThreadGoing) {read_thread = new readThread(handler);read_thread.start();bReadThreadGoing = true;}} else {FT_EEPROM ft_Data = null;if(ftD2xx.createDeviceInfoList(this) <= 0)return;ftDev = ftD2xx.openByIndex(this, 0);ft_Data = ftDev.eepromRead();if (ft_Data == null) {Toast.makeText(this, "Not supported device",Toast.LENGTH_SHORT).show();} else {final FT_EEPROM finalFt_Data = ft_Data;runOnUiThread(new Runnable() {@Overridepublic void run() {((TextView)findViewById(R.id.vid)).setText(Integer.toHexString(finalFt_Data.VendorId));((TextView)findViewById(R.id.pid)).setText(Integer.toHexString(finalFt_Data.ProductId));}});}int iVid = Integer.parseInt(Integer.toHexString(ft_Data.VendorId),16);int iPid = Integer.parseInt(Integer.toHexString(ft_Data.ProductId),16);ftD2xx.setVIDPID(iVid,iPid);Toast.makeText(this, "open device port(" + tmpProtNumber + ") NG", Toast.LENGTH_LONG).show();//Toast.makeText(this, "Need to get permission!", Toast.LENGTH_SHORT).show();			}

设置连接参数

 if (ftDev == null){return;}if (ftDev.isOpen() == false) {Log.e("j2xx", "SetConfig: device not open");return;}// configure our port// reset to UART mode for 232 devicesftDev.setBitMode((byte) 0, D2xxManager.FT_BITMODE_RESET);ftDev.setBaudRate(baud);switch (dataBits) {case 7:dataBits = D2xxManager.FT_DATA_BITS_7;break;case 8:dataBits = D2xxManager.FT_DATA_BITS_8;break;default:dataBits = D2xxManager.FT_DATA_BITS_8;break;}switch (stopBits) {case 1:stopBits = D2xxManager.FT_STOP_BITS_1;break;case 2:stopBits = D2xxManager.FT_STOP_BITS_2;break;default:stopBits = D2xxManager.FT_STOP_BITS_1;break;}switch (parity) {case 0:parity = D2xxManager.FT_PARITY_NONE;break;case 1:parity = D2xxManager.FT_PARITY_ODD;break;case 2:parity = D2xxManager.FT_PARITY_EVEN;break;case 3:parity = D2xxManager.FT_PARITY_MARK;break;case 4:parity = D2xxManager.FT_PARITY_SPACE;break;default:parity = D2xxManager.FT_PARITY_NONE;break;}ftDev.setDataCharacteristics(dataBits, stopBits, parity);short flowCtrlSetting;switch (flowControl) {case 0:flowCtrlSetting = D2xxManager.FT_FLOW_NONE;break;case 1:flowCtrlSetting = D2xxManager.FT_FLOW_RTS_CTS;break;case 2:flowCtrlSetting = D2xxManager.FT_FLOW_DTR_DSR;break;case 3:flowCtrlSetting = D2xxManager.FT_FLOW_XON_XOFF;break;default:flowCtrlSetting = D2xxManager.FT_FLOW_NONE;break;}// TODO : flow ctrl: XOFF/XOM// TODO : flow ctrl: XOFF/XOMftDev.setFlowControl(flowCtrlSetting, (byte) 0x0b, (byte) 0x0d);uart_configured = true;Toast.makeText(this, "Config done", Toast.LENGTH_SHORT).show();

开启线程，接收数据

 private class readThread  extends Thread {Handler mHandler;readThread(Handler h){mHandler = h;this.setPriority(Thread.MIN_PRIORITY);}@Overridepublic void run() {int i;while(true == bReadThreadGoing) {try {Thread.sleep(50);} catch (InterruptedException e) {}synchronized(ftDev) {iavailable = ftDev.getQueueStatus();if (iavailable > 0) {if(iavailable > readLength){iavailable = readLength;}ftDev.read(readData, iavailable);reciveData = "";for (i = 0; i < iavailable; i++) {readDataToText[i] = (char) readData[i];reciveData += HexUtils.bytesToHexString(readData) + " ";
//                            LogUtil.open().appendMethodB(
//                                    "{rs232:---readDataToText---" + HexUtils.bytesToHexString(readData) +
//                                            "},");}Message msg = mHandler.obtainMessage();mHandler.sendMessage(msg);}}}}}final Handler handler =  new Handler() {@Overridepublic void handleMessage(Message msg) {if(iavailable > 0) {accept.append(String.copyValueOf(readDataToText, 0, iavailable));accept.setText(reciveData);LogUtil.open().appendMethodB("{rs232:---reciveData---" + accept.getText().toString().trim() +"},");}}};

发送数据

 if (ftDev.isOpen() == false) {Log.e("j2xx", "SendMessage: device not open");return;}ftDev.setLatencyTimer((byte) 16);
//		ftDev.purge((byte) (D2xxManager.FT_PURGE_TX | D2xxManager.FT_PURGE_RX));String writeData = editText.getText().toString();byte[] OutData = writeData.getBytes();ftDev.write(OutData, writeData.length());

监听设备连接是否断开

 /***********USB broadcast receiver*******************************************/private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent){String TAG = "FragL";String action = intent.getAction();if(UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {Log.i(TAG,"DETACHED...");LogUtil.open().appendMethodB("{rs232:---DETACHED---},");disconnectFunction();}}};

就只有这么多，如果有需要的可以联系

这里是源代码地址：