CC2640R2F 如何主动更新MTU

试了两种方法

GAPRole_GetParameter(GAPROLE_CONNHANDLE, &connectionHandle);

GATT_ExchangeMTU(connectionHandle,64,selfEntity)

返回值2

无效参数？？

GAPRole_GetParameter(GAPROLE_CONNHANDLE, &connectionHandle);

HCI_LE_SetDataLenCmd(connectionHandle, 64, txTime)

返回值0

不起作用

Alvin Chen：

#define INVALIDPARAMETER0x02 //!< Invalid Parameter\
说明你的参数配置不对，
GATT_ExchangeMTU(connectionHandle,64,selfEntity) 你参数都没填写对。

bStatus_t GATT_ExchangeMTU ( uint16connHandle,
attExchangeMTUReq_t *pReq,
uint8taskId
)

hciStatus_t HCI_LE_SetDataLenCmd ( uint16connHandle,
uint16txOctets,
uint16txTime
)

举例：attExchangeMTUReq_t req;

req.clientRxMTU = xx
// ATT MTU size should be set to the minimum of the Client Rx MTU// and Server Rx MTU valuesVOID GATT_ExchangeMTU(scConnHandle, &req, selfEntity);
}

user4822357：

回复 Alvin Chen:

我的SDK是1.45的，#define GATT_ExchangeMTU(connHandle, pReq, taskID)(icall_directAPI(ICALL_SERVICE_CLASS_BLE, (uint32_t) IDX_GATT_ExchangeMTU, connHandle, pReq, ICall_getLocalMsgEntityId(ICALL_SERVICE_CLASS_BLE_MSG, taskID)))

user4822357：

回复 Alvin Chen:

我也改了，试VOID GATT_ExchangeMTU(scConnHandle, &req, selfEntity);返回值还是2

Alvin Chen：

回复 user4822357:

看一下ble_user_config中是否修改了，参考下面博客

http://leconiot.com/download/cc2640r2f/ble_stack_app/app_examples/exchange_mtu/exchange_mtu.html