程序卡死如何定位错误

对方无法输入 · 发表于 2019-4-3 18:50:17

我的程序主要是，定时器定时，每30S向传感器问询读数，我在数据接收的地方加入了RINGBUFFER（循环缓冲数组）之后进入定时中断，程序就会卡住。我的数据可以正常写入数组，也可以正常从循环缓冲数组中读出。RINGBUFFER主要参考的是机智云的代码;

************************************************************
* @file       ringbuffer.c
* @brief       Loop buffer processing
* @Author    Gizwits
* @date       2017-07-19
* @version    V03030000
* @copyright Gizwits
*
* @note       Gizwits is only for smart hardware
*             Gizwits Smart Cloud for Smart Products
*             Links | Value Added | Open | Neutral | Safety | Own | Free | Ecology
*             www.gizwits.com
*
***********************************************************/
#include "ringBuffer.h"
#include "common.h"

rb_t DataRecievce;
uint8_t rbBuf[18];

/**********
创建环形缓冲区的函数
********************/
void RingbufferInit(void)
{
DataRecievce.rbCapacity =18;
DataRecievce.rbBuff = rbBuf;
if(0==rbCreate(&DataRecievce))
   {
   printf ("rbCreate success\n");
   }
}

int8_t ICACHE_FLASH_ATTR rbCreate(rb_t* rb)
{
if(NULL == rb)
{
      return -1;
}
rb->rbHead = rb->rbBuff;
rb->rbTail = rb->rbBuff;
return 0;
}

/*******
环形缓冲区删除函数
**********/
int8_t ICACHE_FLASH_ATTR rbDelete(rb_t* rb)
{
if(NULL == rb)
{
      return -1;
}

rb->rbBuff = NULL;
rb->rbHead = NULL;
rb->rbTail = NULL;
rb->rbCapacity = 0;
return 0;
}

/****
获取环形缓冲区的容量
****/
int32_t ICACHE_FLASH_ATTR rbCapacity(rb_t *rb)
{
if(NULL == rb)
{
      return -1;
}

return rb->rbCapacity;
}

/*******

*******/
int32_t ICACHE_FLASH_ATTR rbCanRead(rb_t *rb)
{
if(NULL == rb)
{
      return -1;
}

if (rb->rbHead == rb->rbTail)
{
      return 0;
}

if (rb->rbHead < rb->rbTail)
{
      return rb->rbTail - rb->rbHead;
}

return rbCapacity(rb) - (rb->rbHead - rb->rbTail);
}

int32_t ICACHE_FLASH_ATTR rbCanWrite(rb_t *rb)
{
if(NULL == rb)
{
      return -1;
}

return rbCapacity(rb) - rbCanRead(rb);
}

int32_t ICACHE_FLASH_ATTR rbRead(rb_t *rb, void *data, size_t count)
{
int32_t copySz = 0;

if(NULL == rb)
{
      return 16;
}

if(NULL == data)
{
      return 8;
}

if (rb->rbHead <= rb->rbTail)
{
      copySz = min(count, rbCanRead(rb));
      memcpy(data, rb->rbHead, copySz);
      rb->rbHead += copySz;
      return copySz;
}
else
{
      if (count < rbCapacity(rb)-(rb->rbHead - rb->rbBuff))
      {
         copySz = count;
         memcpy(data, rb->rbHead, copySz);
         rb->rbHead += copySz;
         return copySz;
      }
      else
      {
         copySz = rbCapacity(rb) - (rb->rbHead - rb->rbBuff);
         memcpy(data, rb->rbHead, copySz);
         rb->rbHead = rb->rbBuff;
         copySz += rbRead(rb, (char*)data+copySz, count-copySz);
         return copySz;
      }
}
}

//将一定长度的数据（count）从某段地址（data）写入环形缓冲区
int32_t ICACHE_FLASH_ATTR rbWrite(rb_t *rb, const void *data, size_t count)
{
int32_t tailAvailSz = 0;

if((NULL == rb)||(NULL == data))
{
      return -1;
}

if (count >= rbCanWrite(rb))
{
      return -2;
}

if (rb->rbHead <= rb->rbTail)
{
      tailAvailSz = rbCapacity(rb) - (rb->rbTail - rb->rbBuff); //本次可写入的数量=环形数组容量—（尾指针地址-环形数组首地址）
      if (count <= tailAvailSz)
      {
         memcpy(rb->rbTail, data, count);
         rb->rbTail += count;
         if (rb->rbTail == rb->rbBuff+rbCapacity(rb))
         {
            rb->rbTail = rb->rbBuff;
         }
         return count;
      }
      else
      {
         memcpy(rb->rbTail, data, tailAvailSz);
         rb->rbTail = rb->rbBuff;

         return tailAvailSz + rbWrite(rb, (char*)data+tailAvailSz, count-tailAvailSz);
      }
}
else
{
      memcpy(rb->rbTail, data, count);
      rb->rbTail += count;
      return count;
}
}

以上是机智云中的RINGBUFFER代码
下面是我向传感器问询及接收应答的代码（部分）

//串口2中断服务程序
void USART2_IRQHandler(void)
{

if((__HAL_UART_GET_FLAG(&huart2,UART_FLAG_RXNE)!=RESET))
{
   uart2_buff[uart2_p++] =USART2->DR;//存入数组
}
if((__HAL_UART_GET_FLAG(&huart2,UART_FLAG_IDLE)!=RESET))
{
__HAL_UART_CLEAR_IDLEFLAG(&huart2);
rbWrite(&DataRecievce,uart2_buff,uart2_p);  //写入循环缓冲数列
}
}

void getWinddirectionData()
{
AskCmd((u8 *)WinddirectionAsk);
DELAY;
u8 *redata;
//printf("缓冲区可读1：");
//printf("%d",rbCanRead(&DataRecievce));
rbRead(&DataRecievce,redata,7); //从缓冲数组中读出数据
if(crcCheck(redata,7)==1)
{
   SensorData.winddirection = (redata[3]<<8 | redata[4] );  //这里我是要保存到结构体中，进行打包，形成报文上传（不会有错误）
   //rbDelete(&DataRecievce);
     //printf("缓冲区可读0：");
//printf("%d",rbCanRead(&DataRecievce));
}
   clean_rebuff2();
}

思路大概就是这样，如果不加缓冲数组没有错误，程序我们也用了很久了；
最近刚了解缓冲数组，想尝试添加，但是程序总是在定时器中断中卡住；
主要是，找不到错误的地方，大神也可以提供一下找错误的思路，谢谢；