使用外部中断释放信号量，在线程里接收数据，一次成功一次失败，这个代码有问题吗？

发布于 2021-04-21 10:10:47 浏览：1441 订阅该版

中断回调函数释放信号量
void ReceiveData(void *args)
{
rt_sem_release(&idcard_lock);
}

线程接收数据
static void idcardthd_entry(void* parameter)
{
int32_t ret = RET_WS_WORK;
rt_sem_init(&idcard_lock, “idcard_lock”, 0, RT_IPC_FLAG_FIFO);

RTAPP_Debug("idcardthd_entry!\n");    
/*进行二代证波特率匹配*/
while(1)
{
    if((CONF_GetUsbCommFunc()&CONF_USBFUNC_SDT) != 0)
    {
        ret =RET_WS_OK;
        break;
    }
    else
    {
        ret = IDCard_AutoBaudProc();
        if(ret == RET_WS_WORK)
        {
            rt_thread_delay(RT_THREAD_DELAY_TIME);
        }
        if(ret == RET_WS_OK)                    /*波特率匹配成功*/
        {
            break;
        }
        else if(ret == MATCHING_FAILURE)        /*波特率匹配不成功结束线程*/
        {
            break;
        }
    }
}
/*二代证波特率匹配成功进入二代证数据接收发送处理线程*/
if(ret == RET_WS_OK)
{      
    while(1)
    {
        if(RT_EOK == rt_sem_take(&idcard_lock, RT_WAITING_FOREVER))
        {
            rt_base_t level;
            level = rt_hw_interrupt_disable();
            wSendBufLen = IDBox_ReceiveData(ucSendBuf,sizeof(ucSendBuf));
            rt_hw_interrupt_enable(level);
            IDCard_Proc(NULL);
        }
    }
}
RTAPP_Debug("idcardthd_entry end\n");

}
数据接收
uint16_t IDBox_ReceiveData(uint8_t buffer, uint16_t buflen)
{
uint8_t temp = 0;
uint16_t len = 0;
uint8_t data = buffer;
uint8_t i = 0;

if(IDBox_CheckSendDataLock())
{
    return 0;
}
IDBOX_S_SDATA_Q_CFG_INPUT();
IDBOX_S_SCLK_Q_CFG_INPUT();
while (IDBOX_S_SCLK_GET_STATUS() != 0)
{
    if (IDBOX_S_TX_FRAME_GET_STATUS() == 0) goto retn;
}
while (IDBOX_S_TX_FRAME_GET_STATUS() != 0)
{
       temp =0x80;    
    *data = 0x00;
    for (i=0;i<8;i++)
    {                
        while(IDBOX_S_SCLK_GET_STATUS() == 0);        
        if ( IDBOX_S_SDATA_GET_STATUS() != 0)
            (*data)|= temp;
          temp >>= 1;
        while(IDBOX_S_SCLK_GET_STATUS() != 0)
        {
            if (IDBOX_S_TX_FRAME_GET_STATUS() == 0) goto retn;
        }            
    }
    IDBOX_S_SDATA_Q_CFG_OUTPUT();
    IDBOX_S_SDATA_SET_LOW();
    while(IDBOX_S_SCLK_GET_STATUS() == 0);         
    while(IDBOX_S_SCLK_GET_STATUS() != 0)
    {
        if (IDBOX_S_TX_FRAME_GET_STATUS() == 0) goto retn;
    }
    IDBOX_S_SDATA_Q_CFG_INPUT();
    if(len >= buflen)
    {
        goto retn;
    }
    data++;
    len++;
}

retn:

IDBOX_S_SDATA_Q_CFG_OUTPUT();
IDBOX_S_SDATA_SET_HIGH();
IDBOX_S_SCLK_Q_CFG_OUTPUT();
IDBOX_S_SCLK_SET_HIGH();
//rt_sem_release(&idcard_lock);
return len;