BluetoothDemo蓝牙，根据蓝牙设备名进行连接
来源：互联网 发布：淘宝企业店铺提现 编辑：程序博客网 时间：2024/05/20 14:17
在.m文件中
#import "ViewController.h"#import "NSString+SL_Extension.h"#import <CoreBluetooth/CoreBluetooth.h>@interface ViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>@property (nonatomic, strong) CBCentralManager *cMgr; /**< 中心管理设备 *//** 连接到的外设 */@property (nonatomic, strong) CBPeripheral *peripheral;@property (strong ,nonatomic) CBCharacteristic *writeCharacteristic;@property (nonatomic,strong)CBCharacteristic * characteristic;@end@implementation ViewController// 1.建立中心管理者- (CBCentralManager *)cMgr{ if (!_cMgr) { NSLog(@"%s, line = %d", __FUNCTION__, __LINE__); /* 设置主设备的代理,CBCentralManagerDelegate 必须实现的： - (void)centralManagerDidUpdateState:(CBCentralManager *)central;//主设备状态改变调用，在初始化CBCentralManager的适合会打开设备，只有当设备正确打开后才能使用 其他选择实现的委托中比较重要的： - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI; //找到外设 - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral;//连接外设成功 - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//外设连接失败 - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//断开外设 */ _cMgr = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()]; // 线程不传默认是主线程 } return _cMgr;}- (void)viewDidLoad { [super viewDidLoad]; self.title = @"大家好 我是山寨手环"; self.view.backgroundColor = [UIColor orangeColor]; // 初始化 [self cMgr]; // 不能在此处扫描,因为状态还没变为打开 //[self.cMgr scanForPeripheralsWithServices:nil options:nil];}#pragma mark - CBCentralManagerDelegate// 中心管理者状态改变, 在初始化CBCentralManager的时候会打开设备，只有当设备正确打开后才能使用- (void)centralManagerDidUpdateState:(CBCentralManager *)central{ NSLog(@"%s, line = %d", __FUNCTION__, __LINE__); switch (central.state) { case CBCentralManagerStateUnknown: NSLog(@">>>CBCentralManagerStateUnknown"); break; case CBCentralManagerStateResetting: NSLog(@">>>CBCentralManagerStateResetting"); break; case CBCentralManagerStateUnsupported: NSLog(@">>>CBCentralManagerStateUnsupported"); break; case CBCentralManagerStateUnauthorized: NSLog(@">>>CBCentralManagerStateUnauthorized"); break; case CBCentralManagerStatePoweredOff: NSLog(@">>>CBCentralManagerStatePoweredOff"); break; case CBCentralManagerStatePoweredOn: NSLog(@">>>CBCentralManagerStatePoweredOn"); // 2.开始扫描周围的外设 /* 第一个参数nil就是扫描周围所有的外设，扫描到外设后会进入 - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI; */ [self.cMgr scanForPeripheralsWithServices:nil options:nil]; break; default: break; }}// 扫描到设备会进入到此代理方法- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI{ NSLog(@"%s, line = %d, per = %@, data = %@, rssi = %@", __FUNCTION__, __LINE__, peripheral, advertisementData, RSSI); // 接下来连接设备 // 判断设备号是否扫描到 if ([peripheral.name isEqualToString:@"iCre Band"]) { /* 一个主设备最多能连7个外设，每个外设最多只能给一个主设备连接,连接成功，失败，断开会进入各自的委托 - (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral;//连接外设成功的委托 - (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//外设连接失败的委托 - (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error;//断开外设的委托 */ // 保存外设,否则方法结束就销毁 self.peripheral = peripheral; // 发现完之后就是进行连接 [self.cMgr connectPeripheral:self.peripheral options:nil]; NSLog(@"%s, line = %d", __FUNCTION__, __LINE__); }else { // 此处Alert提示未扫描到设备,重新扫描#warning noCode NSLog(@"没扫描到 >>>>>>>> %s, line = %d", __FUNCTION__, __LINE__); }}// 外设连接成功- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{ NSLog(@"%s, line = %d", __FUNCTION__, __LINE__); NSLog(@">>>连接到名称为（%@）的设备-成功",peripheral.name); //设置的peripheral代理CBPeripheralDelegate //@interface ViewController : UIViewController<CBCentralManagerDelegate,CBPeripheralDelegate> [peripheral setDelegate:self]; //扫描外设Services，成功后会进入方法：-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{ [peripheral discoverServices:nil]; // 停止扫描 [self.cMgr stopScan];}// 外设连接失败- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{ NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);}// 断开连接(丢失连接)- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{ NSLog(@"%s, line = %d", __FUNCTION__, __LINE__);}#pragma mark - CBPeripheralDelegate// 发现外设的service- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{ if (error) { NSLog(@">>>Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]); return; } for (CBService *service in peripheral.services) { NSLog(@"service.UUID = %@", service.UUID); //扫描每个service的Characteristics，扫描到后会进入方法： -(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error [peripheral discoverCharacteristics:nil forService:service]; }}// 外设发现service的特征- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{ if (error) { NSLog(@"error Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]); return; }#warning noCodeFor 优化,分开写是为了让大家看注释清晰,并不符合编码规范 //获取Characteristic的值，读到数据会进入方法：-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error// for (CBCharacteristic *characteristic in service.characteristics){// [peripheral readValueForCharacteristic:characteristic]; // 外设读取特征的值// }// //搜索Characteristic的Descriptors，读到数据会进入方法：-(void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error// for (CBCharacteristic *characteristic in service.characteristics){// [peripheral discoverDescriptorsForCharacteristic:characteristic]; // 外设发现特征的描述// } for (CBCharacteristic * characteristic in service.characteristics) { // NSLog(@"查找到的服务（属性）%@",characteristic); //所对应的属性用于接收和发送数据 NSLog(@"service:%@ 的 Characteristic: %@",service.UUID,characteristic.UUID); if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400003-B5A3-F393-E0A9-E50E24DCCA9E"]]) { [peripheral setNotifyValue:YES forCharacteristic:characteristic];//监听这个服务发来的数据 [peripheral readValueForCharacteristic:characteristic];//主动去读取这个服务发来的数据 } if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400002-B5A3-F393-E0A9-E50E24DCCA9E"]]) { _writeCharacteristic = characteristic; } if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400001-B5A3-F393-E0A9-E50E24DCCA9E"]]) {// [peripheral setNotifyValue:YES forCharacteristic:characteristic];//监听这个服务发来的数据// [peripheral readValueForCharacteristic:characteristic];//主动去读取这个服务发来的数据 } }}// 获取characteristic的值- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error{ NSData * data = characteristic.value; Byte * resultByte = (Byte *)[data bytes]; for(int i=0;i<[data length];i++){ printf("testByteFF02[%d] = %d\n",i,resultByte[i]);} //打印出characteristic的UUID和值 //!注意，value的类型是NSData，具体开发时，会根据外设协议制定的方式去解析数据 if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400003-B5A3-F393-E0A9-E50E24DCCA9E"]]) { Byte *databyte = (Byte *)[characteristic.value bytes]; for (int i = 0; i<[characteristic.value length]; i++) { NSLog(@"收到3蓝牙发来的数据 %d",databyte[i]); }// NSString * string = [NSString hexadecimalString:characteristic.value]; NSLog(@"----------%@",characteristic.value); //在这里解析收到的数据，一般是data类型的数据，这里要根据蓝牙厂商提供的协议进行解析并且配合LightBlue来查看数据结构，我当时收到的数据是十六进制的数据但是是data类型，所以我先讲data解析出来之后转为十进制来使用。具体方法后面我会贴出 //还有一点收到数据后有的硬件是需要应答的，如果应答的话就是在这里再给蓝牙发一个指令（写数据）：“我收到发的东西了，你那边要做什么操作可以做了”。 } if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400001-B5A3-F393-E0A9-E50E24DCCA9E"]]) { Byte *databyte = (Byte *)[characteristic.value bytes]; for (int i = 0; i<[characteristic.value length]; i++) { NSLog(@"收到1蓝牙发来的数据 %d",databyte[i]); } NSString * string = [NSString hexadecimalString:characteristic.value]; NSLog(@"----------%@",[NSString stringFromHexString:string]); //在这里解析收到的数据，一般是data类型的数据，这里要根据蓝牙厂商提供的协议进行解析并且配合LightBlue来查看数据结构，我当时收到的数据是十六进制的数据但是是data类型，所以我先讲data解析出来之后转为十进制来使用。具体方法后面我会贴出 //还有一点收到数据后有的硬件是需要应答的，如果应答的话就是在这里再给蓝牙发一个指令（写数据）：“我收到发的东西了，你那边要做什么操作可以做了”。 } if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"6E400002-B5A3-F393-E0A9-E50E24DCCA9E"]]) { Byte *databyte = (Byte *)[characteristic.value bytes]; for (int i = 0; i<[characteristic.value length]; i++) { NSLog(@"收到2蓝牙发来的数据 %d",databyte[i]); } //在这里解析收到的数据，一般是data类型的数据，这里要根据蓝牙厂商提供的协议进行解析并且配合LightBlue来查看数据结构，我当时收到的数据是十六进制的数据但是是data类型，所以我先讲data解析出来之后转为十进制来使用。具体方法后面我会贴出 //还有一点收到数据后有的硬件是需要应答的，如果应答的话就是在这里再给蓝牙发一个指令（写数据）：“我收到发的东西了，你那边要做什么操作可以做了”。 } NSString *dataStr = [[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding]; NSLog(@"%s, line = %d, characteristic.UUID:%@ value:%@", __FUNCTION__, __LINE__, characteristic.UUID, dataStr);}// 获取Characteristics的 descriptor的值- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(nonnull CBDescriptor *)descriptor error:(nullable NSError *)error{ //打印出DescriptorsUUID 和value //这个descriptor都是对于characteristic的描述，一般都是字符串，所以这里我们转换成字符串去解析 NSString *dataStr = [[NSString alloc]initWithData:descriptor.value encoding:NSUTF8StringEncoding]; NSLog(@"%s, line = %d, characteristic.UUID:%@ value:%@", __FUNCTION__, __LINE__, descriptor.UUID, dataStr);}// 发现特征Characteristics的描述Descriptor- (void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error{ NSLog(@"%s, line = %d", __FUNCTION__, __LINE__); for (CBDescriptor *descriptor in characteristic.descriptors) { NSLog(@"descriptor.UUID:%@",descriptor.UUID); }}// 5.外设写数据到特征中// 需要注意的是特征的属性是否支持写数据- (void)sl_peripheral:(CBPeripheral *)peripheral didWriteData:(NSData *)data forCharacteristic:(nonnull CBCharacteristic *)characteristic{ /* typedef NS_OPTIONS(NSUInteger, CBCharacteristicProperties) { CBCharacteristicPropertyBroadcast = 0x01, CBCharacteristicPropertyRead = 0x02, CBCharacteristicPropertyWriteWithoutResponse = 0x04, CBCharacteristicPropertyWrite = 0x08, CBCharacteristicPropertyNotify = 0x10, CBCharacteristicPropertyIndicate = 0x20, CBCharacteristicPropertyAuthenticatedSignedWrites = 0x40, CBCharacteristicPropertyExtendedProperties = 0x80, CBCharacteristicPropertyNotifyEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0) = 0x100, CBCharacteristicPropertyIndicateEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0) = 0x200 }; 打印出特征的权限(characteristic.properties),可以看到有很多种,这是一个NS_OPTIONS的枚举,可以是多个值 常见的又read,write,noitfy,indicate.知道这几个基本够用了,前俩是读写权限,后俩都是通知,俩不同的通知方式 */ NSLog(@"%s, line = %d, char.pro = %d", __FUNCTION__, __LINE__, characteristic.properties); // 此时由于枚举属性是NS_OPTIONS,所以一个枚举可能对应多个类型,所以判断不能用 = ,而应该用包含& if (characteristic.properties & CBCharacteristicPropertyWrite) { // 核心代码在这里 [peripheral writeValue:data // 写入的数据 forCharacteristic:characteristic // 写给哪个特征 type:CBCharacteristicWriteWithResponse];// 通过此响应记录是否成功写入 }}// 6.通知的订阅和取消订阅// 实际核心代码是一个方法// 一般这两个方法要根据产品需求来确定写在何处- (void)sl_peripheral:(CBPeripheral *)peripheral regNotifyWithCharacteristic:(nonnull CBCharacteristic *)characteristic{ // 外设为特征订阅通知 数据会进入 peripheral:didUpdateValueForCharacteristic:error:方法 [peripheral setNotifyValue:YES forCharacteristic:characteristic];}- (void)sl_peripheral:(CBPeripheral *)peripheral CancleRegNotifyWithCharacteristic:(nonnull CBCharacteristic *)characteristic{ // 外设取消订阅通知 数据会进入 peripheral:didUpdateValueForCharacteristic:error:方法 [peripheral setNotifyValue:NO forCharacteristic:characteristic];}// 7.断开连接- (void)sl_dismissConentedWithPeripheral:(CBPeripheral *)peripheral{ // 停止扫描 [self.cMgr stopScan]; // 断开连接 [self.cMgr cancelPeripheralConnection:peripheral];}- (IBAction)sendMessageToBan:(id)sender { //crc // unsigned char data0 [5]= {0}; data0[0] = 0x6; *(data0+1) = 0x0; *(data0+2) = 0x10; *(data0+3) = 0x0; *(data0+4) = 0x0; uint16_t bb = bd_crc16(0,data0,sizeof(data0)); NSLog(@"收到1蓝牙发来的数据%d",bb); unsigned char data [13]= {0}; data[0] = 0xab; *(data+1) = 0x0; *(data+2) = 0x0; *(data+3) = 0x5; *(data+4) = 0xc5; *(data+5) = 0x89; *(data+6) = 0x0; *(data+7) = 0x1e; *(data+8) = 0x6; *(data+9) = 0x0; *(data+10) = 0x10; *(data+11) = 0x0; *(data+12) = 0x0;// *(data+5) = 0x0; NSData *data1 = [NSData dataWithBytes:data length:sizeof(data)]; if (_peripheral.state == CBPeripheralStateConnected) { [_peripheral writeValue:data1 forCharacteristic:_writeCharacteristic type:CBCharacteristicWriteWithResponse]; }}//用于检测中心向外设写数据是否成功-(void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{ if (error) { NSLog(@"发送数据失败=======%@",error.userInfo); }else{ //马达接口 //ab 0 0 5 5 d8 0 50 6 0 11 0 0 unsigned char data [13]= {0}; //Magic byte,有 效值为 0XAB data[0] = 0xab; //Reserve 2 bits ERR flag Ack flag Version *(data+1) = 0x0; //Payload length *(data+2) = 0x0; // *(data+3) = 0x5; //CRC16 *(data+4) = 0x1; // *(data+5) = 0x68; //Sequence id *(data+6) = 0x0; *(data+7) = 0x3c; // *(data+8) = 0x6; // *(data+9) = 0x0; // *(data+10) = 0x6; // *(data+11) = 0x0; // *(data+12) = 0x0; // *(data+5) = 0x0; NSData *data1 = [NSData dataWithBytes:data length:sizeof(data)]; if (_peripheral.state == CBPeripheralStateConnected) { [_peripheral writeValue:data1 forCharacteristic:_writeCharacteristic type:CBCharacteristicWriteWithResponse]; } NSLog(@"发送数据成功"); } [peripheral readValueForCharacteristic:characteristic];}-(NSData *)hexString:(NSString *)hexString { int j=0; Byte bytes[20]; ///3ds key的Byte 数组， 128位 for(int i=0; i<[hexString length]; i++) { int int_ch; /// 两位16进制数转化后的10进制数 unichar hex_char1 = [hexString characterAtIndex:i]; ////两位16进制数中的第一位(高位*16) int int_ch1; if(hex_char1 >= '0' && hex_char1 <='9') int_ch1 = (hex_char1-48)*16; //// 0 的Ascll - 48 else if(hex_char1 >= 'A' && hex_char1 <='F') int_ch1 = (hex_char1-55)*16; //// A 的Ascll - 65 else int_ch1 = (hex_char1-87)*16; //// a 的Ascll - 97 i++; unichar hex_char2 = [hexString characterAtIndex:i]; ///两位16进制数中的第二位(低位) int int_ch2; if(hex_char2 >= '0' && hex_char2 <='9') int_ch2 = (hex_char2-48); //// 0 的Ascll - 48 else if(hex_char1 >= 'A' && hex_char1 <='F') int_ch2 = hex_char2-55; //// A 的Ascll - 65 else int_ch2 = hex_char2-87; //// a 的Ascll - 97 int_ch = int_ch1+int_ch2; NSLog(@"int_ch=%d",int_ch); bytes[j] = int_ch; ///将转化后的数放入Byte数组里 j++; } NSData *newData = [[NSData alloc] initWithBytes:bytes length:20]; return newData;}//停止手环振动- (IBAction)stopShake:(id)sender { unsigned char data [13]= {0}; data[0] = 0xab; *(data+1) = 0x0; *(data+2) = 0x0; *(data+3) = 0x5; *(data+4) = 0x5; *(data+5) = 0xd8; *(data+6) = 0x0; *(data+7) = 0x50; *(data+8) = 0x6; *(data+9) = 0x0; *(data+10) = 0x11; *(data+11) = 0x0; *(data+12) = 0x0; // *(data+5) = 0x0; NSData *data1 = [NSData dataWithBytes:data length:sizeof(data)]; if (_peripheral.state == CBPeripheralStateConnected) { [_peripheral writeValue:data1 forCharacteristic:_writeCharacteristic type:CBCharacteristicWriteWithResponse]; }}static inline uint16_t crc16_byte(uint16_t crc, const uint8_t data){ return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];}/** CRC table for the CRC-16. The poly is 0x8005 (x^16 + x^15 + x^2 + 1) */uint16_t const crc16_table[256] ={ 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241, 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440, 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40, 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841, 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40, 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41, 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641, 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040, 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240, 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441, 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41, 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840, 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41, 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40, 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640, 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041, 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240, 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441, 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41, 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840, 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41, 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40, 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640, 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041, 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241, 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440, 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40, 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841, 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40, 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41, 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641, 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040};/** * crc16 - compute the CRC-16 for the data buffer * @crc: previous CRC value 之前的crc值 * @buffer: data pointer data指针 * @len: number of bytes in the buffer 字节数 * * Returns the updated CRC value. */uint16_t bd_crc16(uint16_t crc, uint8_t const *buffer, uint16_t len){ while (len--) crc = crc16_byte(crc, *buffer++); return crc;}@end 0 0
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