怎么获取多个特征值的句柄？
各位好！
比如，主从机连接后，想要实现，按UP键读写特征值1；按Down键读取特征值6。
在simpleBLEGATTDiscoveryEvent里面，
if ( simpleBLESvcStartHdl != 0 )
{
// Discover characteristic
simpleBLEDiscState = BLE_DISC_STATE_CHAR;
req.startHandle = simpleBLESvcStartHdl;
req.endHandle = simpleBLESvcEndHdl;
req.type.len = ATT_BT_UUID_SIZE;
req.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR1_UUID);
req.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR1_UUID);
//hc: To discover the characteristic 6
req_char6.startHandle = simpleBLESvcStartHdl;
req_char6.endHandle = simpleBLESvcEndHdl;
req_char6.type.len = ATT_BT_UUID_SIZE;
req_char6.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR6_UUID);
req_char6.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR6_UUID);
GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req, simpleBLETaskId );
GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req_char6, simpleBLETaskId );
else if ( simpleBLEDiscState == BLE_DISC_STATE_CHAR )
{
// Characteristic found, store handle
if ( pMsg->method == ATT_READ_BY_TYPE_RSP &&
pMsg->msg.readByTypeRsp.numPairs > 0 )
{
simpleBLECharHdl = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[0],
pMsg->msg.readByTypeRsp.dataList[1] );
HalLcdWriteStringValue("numPairs=",pMsg->msg.readByTypeRsp.numPairs,10,HAL_LCD_LINE_5);
HalLcdWriteStringValue("len=",pMsg->msg.readByTypeRsp.len,10,HAL_LCD_LINE_6);
HalLcdWriteStringValueValue(" dataList",pMsg->msg.readByTypeRsp.dataList[0],16,pMsg->msg.readByTypeRsp.dataList[1],16,HAL_LCD_LINE_7);
LCD_WRITE_STRING( "Simple Svc Found", HAL_LCD_LINE_3 );
simpleBLEProcedureInProgress = FALSE;
}
1、发现numPairs一直是1
2、GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req, simpleBLETaskId );函数的具体作用。如果传递的是req，则len=3；如果是req_char6，则len=7；为什么？
typedef struct
{
uint8 numPairs; //!< Number of attribute handle-UUID pairs found
uint8 len; //!< Size of each attribute handle-value pair
uint8 dataList[ATT_MTU_SIZE-2]; //!< List of 1 or more attribute handle-value pairs
} attReadByTypeRsp_t;
怎么没人？
这样做为什么不行？得到的特征值1的句柄是25，对；特征值6的句柄是250，是错的。
static void simpleBLEGATTDiscoveryEvent( gattMsgEvent_t *pMsg )
{
attReadByTypeReq_t req;
attReadByTypeReq_t req_char6;
if ( simpleBLEDiscState == BLE_DISC_STATE_SVC )
{
// Service found, store handles
if ( pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP &&
pMsg->msg.findByTypeValueRsp.numInfo > 0 )
{
simpleBLESvcStartHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].handle;
simpleBLESvcEndHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].grpEndHandle;
simpleBLESvcStartHdl6 = pMsg->msg.findByTypeValueRsp.handlesInfo[1].handle;
simpleBLESvcEndHdl6 = pMsg->msg.findByTypeValueRsp.handlesInfo[1].grpEndHandle;
}
// If procedure complete
if ( ( pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP &&
pMsg->hdr.status == bleProcedureComplete ) ||
( pMsg->method == ATT_ERROR_RSP ) )
{
if ( simpleBLESvcStartHdl != 0 )
{
// Discover characteristic
simpleBLEDiscState = BLE_DISC_STATE_CHAR;
req.startHandle = simpleBLESvcStartHdl;
req.endHandle = simpleBLESvcEndHdl;
req.type.len = ATT_BT_UUID_SIZE;
req.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR1_UUID);
req.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR1_UUID);
req_char6.startHandle = simpleBLESvcStartHdl6;
req_char6.endHandle = simpleBLESvcEndHdl6;
req_char6.type.len = ATT_BT_UUID_SIZE;
req_char6.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR6_UUID);
req_char6.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR6_UUID);
GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req, simpleBLETaskId );
GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req_char6, simpleBLETaskId );
}
}
}
else if ( simpleBLEDiscState == BLE_DISC_STATE_CHAR )
{
// Characteristic found, store handle
if ( pMsg->method == ATT_READ_BY_TYPE_RSP &&
pMsg->msg.readByTypeRsp.numPairs > 0 )
{
simpleBLECharHdl = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[0],
pMsg->msg.readByTypeRsp.dataList[1] );
simpleBLECharHdl6 = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[2],
pMsg->msg.readByTypeRsp.dataList[3] );
HalLcdWriteStringValue("CharHdl:",simpleBLECharHdl,16,HAL_LCD_LINE_4);
HalLcdWriteStringValue("CharHdl6:",simpleBLECharHdl6,16,HAL_LCD_LINE_5);
HalLcdWriteStringValue("numPairs=",pMsg->msg.readByTypeRsp.numPairs,10,HAL_LCD_LINE_6);
HalLcdWriteStringValue("len=",pMsg->msg.readByTypeRsp.len,10,HAL_LCD_LINE_7);
HalLcdWriteStringValueValue("dL",pMsg->msg.readByTypeRsp.dataList[2],16,pMsg->msg.readByTypeRsp.dataList[3],16,HAL_LCD_LINE_8);
LCD_WRITE_STRING( "Simple Svc Found", HAL_LCD_LINE_3 );
simpleBLEProcedureInProgress = FALSE;
}
simpleBLEDiscState = BLE_DISC_STATE_IDLE;
}
}
首先使用GATT_DiscAllChars函数启动扫描，然后就可以在*pDiscState == BLE_DISC_STATE_CHAR的中断中得到msg.readByTypeRsp，里面包含有扫描到的特征值的handle，缓存起来就可以进行读写操作了。
谢谢！
还有几个问题想请教一下：
1、GATT_DiscAllChars函数在哪里调用？
2、msg.readByTypeRsp里面是不是dataList[]存储了特征值的handle？
3、特征值1和特征值5分别对应dataList的第几个元素？
simpleBLECharHdl = BUILD_UINT16( pMsg->msg.readByTypeRsp.dataList[0],
pMsg->msg.readByTypeRsp.dataList[1] );
4、GATT_ReadUsingCharUUID函数的作用？
如果 GATT_ReadUsingCharUUID( simpleBLEConnHandle, &req, simpleBLETaskId );
主机程序里面dataList[0]、dataList[1]就对应特征值1的handle
Hi,Fred
我按照你的方法，调用GATT_DiscAllChars启动扫描，在BLE_DISC_STATE_CHAR里面
打印出来
pMsg->msg.readByTypeRsp.numPairs为1
pMsg->msg.readByTypeRsp.dataList[0] 25
pMsg->msg.readByTypeRsp.dataList[1] 0
下面依次为01,02,00,00,3E,00
还是只有特征值1的句柄
能不能在详细点呢
你好You You，你的这段代码
{
simpleBLESvcStartHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].handle;
simpleBLESvcEndHdl = pMsg->msg.findByTypeValueRsp.handlesInfo[0].grpEndHandle;
simpleBLESvcStartHdl6 = pMsg->msg.findByTypeValueRsp.handlesInfo[1].handle;
simpleBLESvcEndHdl6 = pMsg->msg.findByTypeValueRsp.handlesInfo[1].grpEndHandle;
}
特征值1和特征值6获取的是服务开始句柄和结束句柄是一样的吧。。因为char1和char6都是同属于一个服务下。服务句柄区间应该包含了char1和char6的句柄。
dearFred：
我已经获得了特征值1的句柄0x25，但是在使用句柄读取特征值的时候GATT_ReadCharValue函数返回值却是0x16，意思是在等待，不知道这是怎么回事，你有遇到过或者知道怎么回事吗？
谢谢！