CC2640R2F从机（Peripheral）执行GATT_WriteNoRsp后程序崩溃问题

CC2640R2F参考官方simple_peripheral_cc2640r2lp_app例程写了一段Peripheral向Central写变量的代码，采用WriteNoRsp方式，connection handle和character handle已事先正确获得，并且simple_peripheral_cc2640r2lp_stack部分已去掉了NO_GATT_CLIENT定义，WriteNoRsp返回SUCCESS，通过sniffer抓包也能够抓到Peripheral发送的写变量数据包。

现在遇到的问题是WriteNoRsp执行完之后，执行到Event_post这里程序就会崩溃，跳到ti_sysbios_family_arm_m3_Hwi_excHandler，如果不执行WrtieNoRsp就没有问题，查了很久都没有找到原因，希望各位高手能指点一二，非常感谢！

static gattMsg_t t_Message;

static uint16 u16_ConnectionHandle;

static uint16 u16_CharacterHandle;

static ICall_SyncHandle t_ICallSyncHandle;

static ICall_EntityID t_ICallEntityID;

#define EVENT_WRITE (1 << 0)


void ProcessTask(UArg a0, UArg a1)
{
uint32_t t_Events;


ICall_registerApp(&t_ICallEntityID, &t_ICallSyncHandle);


while (1)
{t_Events = Event_pend(t_ICallSyncHandle, Event_Id_NONE,EVENT_WRITE, ICALL_TIMEOUT_FOREVER);//do something

｝
}


uint GATT_Write (const uint8 *u8p_Data, uint8 u8_Length)
{attWriteReq_t *tp_WriteRequest;tp_WriteRequest = &t_Message.writeReq;tp_WriteRequest->pValue = (uint8 *)GATT_bm_alloc(u16_ConnectionHandle, ATT_WRITE_REQ, (uint16)u8_Length, NULL);if (tp_WriteRequest->pValue != NULL ){tp_WriteRequest->len = u8_Length;tp_WriteRequest->sig = 0;tp_WriteRequest->cmd = 1;memcpy(tp_WriteRequest->pValue, u8p_Data, u8_Length);tp_WriteRequest->handle = u16_CharacterHandle;if (GATT_WriteNoRsp(u16_ConnectionHandle, tp_WriteRequest) != SUCCESS){GATT_bm_free(&t_Message, ATT_WRITE_REQ);return FUNCTION_FAIL;}}Event_post(t_ICallSyncHandle, EVENT_WRITE);return FUNCTION_OK;

}

Jianfeng Lv：

找到原因了，Gatt_WriteNoRsp所在任务堆栈溢出了，原来参考官方示例设置为512字节，改成1024字节就正常了，官方示例的堆栈设置太保守了…

Viki Shi：

看到你在E2E发的帖子了，原因是堆栈溢出。其实对于堆栈大小，TI没有明确规定，一般来说，如果应用比较复杂， 需要手动改一下大小

da qin zheng sheng：

谢谢分享经验，说明rtos还是耗费硬件资源的

user4941551：

回复 Jianfeng Lv:

请问一下这个堆栈大小在哪里更改的

huijun li：

回复 Jianfeng Lv:

高手您好：请问一下这个堆栈大小在哪里更改的啊