Client 发送数据给Server

使用的器件：USBdongle+MiniDK + usb转串口

功能：通过串口发送数据给USBDongle，触发USBDongle发送数据给MiniDK

使用例程：SimpleBLEPeripheral与，SimpleBLECentral

在SimpleBLEPeripheral中添加自定义特性值6

修改simpleGATTprofile.c，simpleGATTprofile.h

添加可读写的20个字节的SIMPLEPROFILE_CHAR6

在center中，一旦与simplePeripheral建立连接，就可获取到所有ServerUUID，并能得到相应

特性值的Handle，

获取特性值Handle

bStatus_t GATT_WriteCharValue        (        uint16         connHandle,

attWriteReq_t *         pReq,

uint8         taskId        

)                        

只有当Client端（USBDongle）知道Server端（MiniDK）相应characteristic value 的Handle.

并且已经连接上才能写入成功

Parameters:

connHandle         - connection to use

pReq         - pointer to request to be sent

taskId         - task to be notified of response

Returns:

SUCCESS: Request was sent successfully.

INVALIDPARAMETER: Invalid connection handle or request field.

MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.

bleNotConnected: Connection is down.

blePending: A response is pending with this server.

bleMemAllocError: Memory allocation error occurred.

bleTimeout: Previous transaction timed out.

typedef struct

{

  uint16 handle;               //!< 要写入的characteristic value 的Handle

  uint8 len;                   //!< 写入数据的长度

  uint8 value[ATT_MTU_SIZE-3]; //!<</span>数据内容

  uint8 sig;                   //!< Authentication Signature status (not included (0), valid (1), invalid (2))

  uint8 cmd;                   //!< Command Flag（暂不知这两个参数用途）

} attWriteReq_t;

-----------------------------------------------------------------------------------------------------------------

     uint8 state = 0;

     uint8 ch[] = "123456789abcdef1234";   //最大20个字节。

     attWriteReq_t req;

     req.handle = 0x0035;            //特性值6handle

     req.len = 19;

     osal_memcpy(req.value,ch,19);

     req.sig = 0;

     req.cmd = 0;

     state = GATT_WriteCharValue(simpleBLEConnHandle,&req,simpleBLETaskId) ;

     if( state == SUCCESS) 

--------------------------------------------------------------------------------------------------------------------

在center中通过串口控制来向从机发送数据，

由于simpleperipheral中的characteristic中的内容改变了，会触发相应的CallBack函数

在simpleperipheral中

static void simpleProfileChangeCB( uint8 paramID )为charasteristic值改变的回调函数paramID为

charasteristic的uuid

通过switch（paramID）查找到对应的characteristic通过

SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR6, newChar );                  

就能得到所接收到的数据。不过数据最大长度只有20个字节。

  case SIMPLEPROFILE_CHAR6:

    {

      SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR6, newChar );

    }

SimpleProfile_GetParameter直接将char6的内容复制给了newChar，这样就得到了center发送过来的数据了。

  case SIMPLEPROFILE_CHAR6:

      VOID osal_memcpy( value, simpleProfileChar6, SIMPLEPROFILE_CHAR6_LEN );