CC2640 UART使用回调方式进行数据接收时程序经常死掉

串口初始化代码如下：

#include "cc2640_uart.h"

// 串口部分
#define MAX_NUM_RX_BYTES100// Maximum RX bytes to receive in one go
#define MAX_NUM_TX_BYTES100// Maximum TX bytes to send in one go
uint32_t wantedRxBytes;// Number of bytes received so far
uint8_t rxBuf[MAX_NUM_RX_BYTES];// Receive buffer
uint8_t txBuf[MAX_NUM_TX_BYTES];// Transmit buffer

// 回调函數
static void readCallback(UART_Handle handle, void *rxBuf, size_t size);

// 串口全局變量
UART_Handle handle;
UART_Params params;

void cc2640_uart_init(void)
{// Init UART and specify non-default parametersUART_Params_init(&params);params.baudRate= 115200;params.writeDataMode = UART_DATA_BINARY;params.readMode= UART_MODE_CALLBACK;params.readCallback  = readCallback;// Open the UART and initiate the first readhandle = UART_open(Board_UART, &params);wantedRxBytes = 1;int rxBytes = UART_read(handle, rxBuf, wantedRxBytes);
}

static void readCallback(UART_Handle handle, void *rxBuf, size_t size)
{// Copy bytes from RX buffer to TX bufferfor(size_t i = 0; i < size; i++)txBuf[i] = ((uint8_t*)rxBuf)[i];// Echo the bytes received back to transmitterUART_write(handle, txBuf, size);// Start another read, with size the same as it was during first call to// UART_read()UART_read(handle, rxBuf, wantedRxBytes);
}

使用串口调试助手对2640定时发送数据，开始时可以收到数据，但是收着收着程序就死掉了，不知道为什么，如下图所示：

本来应该是发送数据和接收数据相等的，现在是收到479个字节数据程序就死掉了然后无法继续接收数据。找了很久不知道为什么，请问这是什么原因，谢谢！

猜猜我是谁：

没有人知道为什么吗？我改用任务的方式试了还是这样，串口收数据，程序跑着跑着就挂掉了…

代码如下：

#include "uart_test.h"
#include "stdint.h"
#include <Board.h>
#include <ti/drivers/UART.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/drivers/uart/UARTCC26XX.h>// Task configuration
#define UART_TASK_PRIORITY1#ifndef UART_TASK_STACK_SIZE
#define UART_TASK_STACK_SIZE644
#endif// Task configuration
Task_Struct uartTask;
Char uartTaskStack[UART_TASK_STACK_SIZE];#define MAX_NUM_RX_BYTES100// Maximum RX bytes to receive in one go
#define MAX_NUM_TX_BYTES100// Maximum TX bytes to send in one gouint32_t wantedRxBytes;// Number of bytes received so far
uint8_t rxBuf[MAX_NUM_RX_BYTES];// Receive buffer
uint8_t txBuf[MAX_NUM_TX_BYTES];// Transmit buffer/******************************************************************************** LOCAL FUNCTIONS*/
static void taskStartFxn(UArg a0, UArg a1);
static void readCallback(UART_Handle handle, void *rxBuf, size_t size);/******************************************************************************** @fnUart_createTask** @briefTask creation function for the uart.** @paramNone.** @returnNone.*/
void Uart_createTask(void)
{Task_Params taskParams;// Configure taskTask_Params_init(&taskParams);taskParams.stack = uartTaskStack;taskParams.stackSize = UART_TASK_STACK_SIZE;taskParams.priority = UART_TASK_PRIORITY;Task_construct(&uartTask, taskStartFxn, &taskParams, NULL);
}/********************************************************************** @fntaskStartFxn** @briefApplication task entry point for the uart test.** @parama0, a1 - not used.** @returnNone.*/
static void taskStartFxn(UArg a0, UArg a1){UART_Handle handle;UART_Params params;// Init UART and specify non-default parametersUART_Params_init(&params);params.baudRate= 9600;params.writeDataMode = UART_DATA_BINARY;params.readMode= UART_MODE_CALLBACK;params.readDataMode= UART_DATA_BINARY;params.readCallback= readCallback;// Open the UART and initiate the first readhandle = UART_open(Board_UART, &params);// Enable RETURN_PARTIALUART_control(handle, UARTCC26XX_CMD_RETURN_PARTIAL_ENABLE, NULL);wantedRxBytes = MAX_NUM_RX_BYTES;int rxBytes = UART_read(handle, rxBuf, wantedRxBytes);Task_exit();
}// Callback function
static void readCallback(UART_Handle handle, void *rxBuf, size_t size)
{// Copy bytes from RX buffer to TX bufferfor(size_t i = 0; i < size; i++)txBuf[i] = ((uint8_t*)rxBuf)[i];// Echo the bytes received back to transmitterUART_write(handle, txBuf, size);// Start another read, with size the same as it was during first call to// UART_read()UART_read(handle, rxBuf, wantedRxBytes);
}

cedar_xuesong：

回复 猜猜我是谁:

哪一行挂了？？？

y s：

回复 cedar_xuesong:

可以使用npi-uart。

Rugooo Zhang：

别再readcallback中调用UART_write

da qin zheng sheng：

想办法用中断工作模式接收。

user4587069：

readcallback是在read中断里处理的，再次调用write会使程序异常。使用队列或信号量处理下就可以了

user5291981：

回复 Rugooo Zhang:

我通过串口写字库，可是数据只能接收到一部分是为什么？感谢