Android 关于BLE蓝牙用Xmodem协议升级蓝牙固件

最近公司安排了一个BLE升级固件的任务,要用Xmodem协议,搞的我赶紧去补这块的知识。

首先我用的是第三方bluetoothkit 进行连接的。

不知道的小伙伴可以去github先了解一下。https://github.com/dingjikerbo/Android-BluetoothKit

其实连接什么的我就不做介绍了。

利用这个Xmodem协议升级的时候我发现有些坑。

 

1.安卓为了适配多个版本,机型,强制要求,BLE每次只能收发20个字节,超过就收不到了,发到好说,收数据的需要跟嵌入式同学沟通。(网上也有说修改MTU值达到发送更多的,我试过,但没成功。可能是我的方法有误,有兴趣的可以去试一下)

2.BLE发送时间间隔其实是有要求的,底层队列是串行的,不注意的话很容易阻塞。下次再发的时候就会出现命令货不对版的情况。(建议是每发20字节,隔80--100毫秒在发下一个20字节。)

首先先贴出Xmodem代码

package com.mituo.pda_ble;


import android.util.Log;
import android.view.View;
import android.widget.Toast;

import com.inuker.bluetooth.library.BluetoothClient;
import com.inuker.bluetooth.library.Constants;
import com.inuker.bluetooth.library.connect.response.BleNotifyResponse;
import com.inuker.bluetooth.library.connect.response.BleReadResponse;
import com.inuker.bluetooth.library.connect.response.BleWriteResponse;

import org.greenrobot.eventbus.EventBus;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.UUID;

/**
 * Created by Administrator on 2019-08-06.
 */
public class Xmodem {

    // 开始
    private final byte SOH = 0x01;
    // 结束
    private final byte EOT = 0x04;
    // 应答
    private final byte ACK = 0x06;
    // 重传
    private final byte NAK = 0x15;
    // 无条件结束
    private final byte CAN = 0x18;

    // 以128字节块的形式传输数据
    private final int SECTOR_SIZE = 128;
    // 最大错误(无应答)包数
    private final int MAX_ERRORS = 10;

    // 输入流,用于读取串口数据
    private InputStream inputStream;
    // 输出流,用于发送串口数据
    private OutputStream outputStream;

    public Xmodem(InputStream inputStream, OutputStream outputStream) {
        this.inputStream = inputStream;
        this.outputStream = outputStream;
    }

    //scanRecords的格式转换
    static final char[] hexArray = "0123456789ABCDEF".toCharArray();

    private static String bytesToHex(byte[] bytes) {
        char[] hexChars = new char[bytes.length * 2];
        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }

    private BluetoothClient Client;
    String MAC;
    String serviceUUID;
    String w_UUID;

    public Xmodem(BluetoothClient mClient, String MAC, String serviceUUID, String w_UUID) {
        Client = mClient;
        this.MAC = MAC;
        this.serviceUUID = serviceUUID;
        this.w_UUID = w_UUID;
    }

    /**
     * 发送数据
     *
     * @param filePath 文件路径
     */
    public void send(final String filePath) {
        new Thread() {
            public void run() {
                try {
                    long num=0;
                    // 错误包数
                    int errorCount;
                    // 包序号
                    byte blockNumber = 0x01;
                    // 校验和
                    byte checkSum;
                    // 读取到缓冲区的字节数量
                    int nbytes;
                    // 初始化数据缓冲区
                    byte[] sector = new byte[SECTOR_SIZE];
                    // 读取文件初始化
                    FileInputStream  fis = new FileInputStream(filePath);
                    Log.e("aris","文件"+"的大小是:"+fis.available()+"\n");
                    EventBus.getDefault().post("文件大小:"+fis.available());
                    DataInputStream inputStream = new DataInputStream(
                            fis);
                    while ((nbytes = inputStream.read(sector)) > 0) {
                        // 如果最后一包数据小于128个字节,以0xff补齐
                        if (nbytes < SECTOR_SIZE) {
                            for (int i = nbytes; i < SECTOR_SIZE; i++) {
                                sector[i] = (byte) 0xff;
                            }
                        }
                        num+=nbytes;
                        // 同一包数据最多发送10次
                        Log.e("aris", "000000000");
                        errorCount = 0;
                        while (errorCount < MAX_ERRORS) {
                            Bleutils.getInstance().setNotify("");
                            // 组包
                            // 控制字符 + 包序号 + 包序号的反码 + 数据 + 校验和
                            checkSum = (byte) (calc(sector) & 0x00ffff);
                            putChar(SOH, blockNumber, ~blockNumber, sector, checkSum);

                            Thread.sleep(150);
                            // 获取应答数据
//                            Log.e("aris", "Notify  :  " + Bleutils.getInstance().getNotify());
                            // 如果收到应答数据则跳出循环,发送下一包数据
                            // 未收到应答,错误包数+1,继续重发
                            if (Bleutils.getInstance().getNotify().equals("06")) {
                                Log.e("aris", "发送下一包数据");
                                EventBus.getDefault().post("进度:"+num);
                                break;
                            } else {
                                Thread.sleep(1000);
                                if (Bleutils.getInstance().getNotify().equals("06")) {
                                    Log.e("aris", "444444444444");
                                    break;
                                }
                                ++errorCount;
//                                if (errorCount == 9) {
                                EventBus.getDefault().post("升级错误");
                                Client.clearRequest(MAC, 0);//clearType表示要清除的请求类型,如果要清除多种请求,可以将多种类型取或,如果要清除所有请求,则传入0。
                                Log.e("aris", "升级错误,终止升级");
                                Client.refreshCache(MAC);
                                Thread.sleep(500);
                                Client.disconnect(MAC);
                                return;
//                                }
                            }

                        }
                        // 包序号自增
                        blockNumber = (byte) ((++blockNumber) % 256);
                    }

                    // 所有数据发送完成后,发送结束标识
                    boolean isAck = false;
                    while (!isAck) {
                        Bleutils.getInstance().setNotify("");
                        putData(EOT, "发送结束标识");
                        Thread.sleep(500);
                        isAck = Bleutils.getInstance().getNotify().equals("06");
                    }

                    Thread.sleep(100);
                    Bleutils.getInstance().setNotify("软件更新指令");
                    update();
                    Thread.sleep(500);
                    Client.clearRequest(MAC, 0);//clearType表示要清除的请求类型,如果要清除多种请求,可以将多种类型取或,如果要清除所有请求,则传入0。
                    Client.refreshCache(MAC);
                    Thread.sleep(500);
                    Client.disconnect(MAC);
                    EventBus.getDefault().post("软件更新指令OK");
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            ;
        }.start();

    }



    /**
     * 发送数据
     *
     * @param data 数据
     * @throws IOException 异常
     */

    private void putData(int data, final String s) throws IOException {
        Client.write(MAC, UUID.fromString(serviceUUID), UUID.fromString(w_UUID), new byte[]{(byte) data}, new BleWriteResponse() {
            @Override
            public void onResponse(int code) {
                if (code == Constants.REQUEST_SUCCESS) {
                    Log.e("aris", "putData  write  请求成功 " + s);
                } else if (code == Constants.REQUEST_FAILED) {
                    Log.e("aris", "putData  write  请求失败 " + s);
                    EventBus.getDefault().post("升级错误");
                }
            }
        });
    }

    public static byte hexToByte(String inHex) {
        return (byte) Integer.parseInt(inHex, 16);
    }

    void update() {

        //软件更新指令
        //发送:55  01  31  EE
        byte bt2[] = new byte[4];
        bt2[0] = hexToByte("55");
        bt2[1] = hexToByte("01");
        bt2[2] = hexToByte("31");
        bt2[3] = hexToByte("EE");//EE
        Client.write(MAC, UUID.fromString(serviceUUID), UUID.fromString(w_UUID), bt2, new BleWriteResponse() {
            @Override
            public void onResponse(int code) {
                if (code == Constants.REQUEST_SUCCESS) {
                    Log.e("aris", "update  请求成功 " + code);
                } else if (code == Constants.REQUEST_FAILED) {
                    Log.e("aris", "update  请求失败 " + code);
                }
            }
        });
        Log.e("aris", "软件更新指令");
    }

    /**
     * 发送数据
     *
     * @param SOH
     * @param blockNumber
     * @param i
     * @param data        数据
     * @param checkSum    校验和   @throws IOException 异常
     */
    private void putChar(byte SOH, byte blockNumber, int i, byte[] data, byte checkSum) throws IOException, InterruptedException {
        ByteBuffer bb = ByteBuffer.allocate(data.length + 4).order(
                ByteOrder.BIG_ENDIAN);
        bb.put(SOH);
        bb.put(blockNumber);
        bb.put((byte) i);
        bb.put(data);
        bb.put(checkSum);
        byte data1[] = new byte[20];
        byte data2[] = new byte[20];
        byte data3[] = new byte[20];
        byte data4[] = new byte[20];
        byte data5[] = new byte[20];
        byte data6[] = new byte[20];
        byte data7[] = new byte[12];
        for (int j = 0; j < bb.array().length; j++) {
            if (j < 20) {
                data1[j] = bb.array()[j];
            } else if (j >= 20 && j < 40) {
                data2[j - 20] = bb.array()[j];
            } else if (j >= 40 && j < 60) {
                data3[j - 40] = bb.array()[j];
            } else if (j >= 60 && j < 80) {
                data4[j - 60] = bb.array()[j];
            } else if (j >= 80 && j < 100) {
                data5[j - 80] = bb.array()[j];
            } else if (j >= 100 && j < 120) {
                data6[j - 100] = bb.array()[j];
            } else if (j >= 120 && j < 132) {
                data7[j - 120] = bb.array()[j];
            }
        }
        ByteBuffer bb2 = ByteBuffer.allocate(data.length + 4).order(
                ByteOrder.BIG_ENDIAN);
        bb2.put(data1);
        bb2.put(data2);
        bb2.put(data3);
        bb2.put(data4);
        bb2.put(data5);
        bb2.put(data6);
        bb2.put(data7);
//        Log.e("aris", " <   > bb2.array()" + bb2.array().length + " [] " + bytesToHex(bb2.array()));
        for (int j = 0; j < 7; j++) {
            switch (j) {
                case 0:
                    writedata(data1);
                    break;
                case 1:
                    writedata(data2);
                    break;
                case 2:
                    writedata(data3);
                    break;
                case 3:
                    writedata(data4);
                    break;
                case 4:
                    writedata(data5);
                    break;
                case 5:
                    writedata(data6);
                    break;
                case 6:
                    writedata(data7);
                    break;
            }
            Thread.sleep(90);

        }


    }

    void writedata(byte[] data) {
        Client.write(MAC, UUID.fromString(serviceUUID), UUID.fromString(w_UUID), data, new BleWriteResponse() {
            @Override
            public void onResponse(int code) {
                if (code == Constants.REQUEST_SUCCESS) {
                    Log.e("aris", "putChar  write  请求成功 " + code);
                } else if (code == Constants.REQUEST_FAILED) {
                    Log.e("aris", "putChar  write  请求失败 " + code);
                }
            }
        });
    }


    private static final char crctable[] = {0x0000, 0x1021, 0x2042, 0x3063,
            0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b,
            0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252,
            0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a,
            0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401,
            0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509,
            0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672, 0x1611, 0x0630,
            0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738,
            0xf7df, 0xe7fe, 0xd79d, 0xc7bc, 0x48c4, 0x58e5, 0x6886, 0x78a7,
            0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af,
            0x8948, 0x9969, 0xa90a, 0xb92b, 0x5af5, 0x4ad4, 0x7ab7, 0x6a96,
            0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e,
            0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5,
            0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd,
            0xad2a, 0xbd0b, 0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4,
            0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc,
            0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 0x9188, 0x81a9, 0xb1ca, 0xa1eb,
            0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3,
            0x5004, 0x4025, 0x7046, 0x6067, 0x83b9, 0x9398, 0xa3fb, 0xb3da,
            0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2,
            0x4235, 0x5214, 0x6277, 0x7256, 0xb5ea, 0xa5cb, 0x95a8, 0x8589,
            0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481,
            0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8,
            0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0,
            0x6657, 0x7676, 0x4615, 0x5634, 0xd94c, 0xc96d, 0xf90e, 0xe92f,
            0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827,
            0x18c0, 0x08e1, 0x3882, 0x28a3, 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e,
            0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16,
            0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d,
            0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45,
            0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 0xef1f, 0xff3e, 0xcf5d, 0xdf7c,
            0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74,
            0x2e93, 0x3eb2, 0x0ed1, 0x1ef0};

    public static byte calc(byte[] bytes) {
//        char crc = 0x0000;
        byte crc = 0;
        for (byte b : bytes) {
//            crc = (char) ((crc << 8) ^ crctable[((crc >> 8) ^ b) & 0x00ff]);
            crc = (byte) (crc + b);
        }
        return crc;
    }

}

其实就是简单的分包,然后在发送。只要注意一下间隔。

当然还有一个就是校验方式要和嵌入式同学商量好。

升级是做好了,不过由于速度实在是太慢了,有点鸡肋。一个68KB的升级 .bin,可能需要5-7分钟才能发完。

这个与BLE每次只能发20字节有直接关系。

所有固件升级,还是建议利用BLE 的 OTA升级通道。

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