GD32470I_EVAL_Demo_Suites中FreeRTOS_tcpudp卡死问题

2025-3-12 11:55

配置了一个UDP单播，在任务中周期发送数据，连接网线时没问题；拔掉网线时程序运行40多秒后会卡死在下面while中

static err_t low_level_output(struct netif *netif, struct pbuf *p)

{

    static xSemaphoreHandle s_tx_semaphore = NULL;

    struct pbuf *q;

    uint8_t *buffer ;

    uint16_t framelength = 0;

    ErrStatus reval = ERROR;

  

    SYS_ARCH_DECL_PROTECT(sr);

    

    if (s_tx_semaphore == NULL){

        vSemaphoreCreateBinary (s_tx_semaphore);

    }



    if (xSemaphoreTake(s_tx_semaphore, LOWLEVEL_OUTPUT_WAITING_TIME)){    

        SYS_ARCH_PROTECT(sr);

      

 [color=Red]       while((uint32_t)RESET != (dma_current_txdesc->status & ENET_TDES0_DAV)){[/color]

        }    

        buffer = (uint8_t *)(enet_desc_information_get(dma_current_txdesc, TXDESC_BUFFER_1_ADDR));



        for(q = p; q != NULL; q = q->next){ 

            memcpy((uint8_t *)&buffer[framelength], q->payload, q->len);

            framelength = framelength + q->len;

        }



       /* transmit descriptors to give to DMA */ 

#ifdef SELECT_DESCRIPTORS_ENHANCED_MODE

        reval = ENET_NOCOPY_PTPFRAME_TRANSMIT_ENHANCED_MODE(framelength, NULL);

#else

        reval = ENET_NOCOPY_FRAME_TRANSMIT(framelength);

#endif /* SELECT_DESCRIPTORS_ENHANCED_MODE */



        SYS_ARCH_UNPROTECT(sr);

        

        /* give semaphore and exit */

        xSemaphoreGive(s_tx_semaphore);

    }

    

    if(SUCCESS == reval){

        return ERR_OK;

    }else{

        while(1){

        }

    }

    

}