公司项目已进入小批量测试阶段了，方案使用的是CH32V307+IP101G，频繁出现接收帧错误，导致设备网络无法正常通讯。当DMA产生中断后，使用的接收处理函数如下：
FrameTypeDef ETH_RxPkt_ChainMode(void)
{
u32 framelength = 0;
FrameTypeDef frame = {0,0};
/* Check if the descriptor is owned by the ETHERNET DMA (when set) or CPU (when reset) */
if((DMARxDescToGet->Status & ETH_DMARxDesc_OWN) != (u32)RESET)
{
frame.length = ETH_ERROR;
if ((ETH->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
{
/* Clear RBUS ETHERNET DMA flag */
ETH->DMASR = ETH_DMASR_RBUS;
/* Resume DMA reception */
ETH->DMARPDR = 0;
}
DEBUG_PRINTF("Error:ETH_DMARxDesc_OWN.\r\n");
/* Return error: OWN bit set */
return frame;
}
if(
((DMARxDescToGet->Status & ETH_DMARxDesc_ES) == (u32)RESET) &&
((DMARxDescToGet->Status & ETH_DMARxDesc_LS) != (u32)RESET) &&
((DMARxDescToGet->Status & ETH_DMARxDesc_FS) != (u32)RESET))
{
/* Get the Frame Length of the received packet: substruct 4 bytes of the CRC */
framelength = ((DMARxDescToGet->Status & ETH_DMARxDesc_FL) >> ETH_DMARxDesc_FrameLengthShift) - 4;
/* Get the addrees of the actual buffer */
frame.buffer = DMARxDescToGet->Buffer1Addr;
}
else
{
/* Return ERROR */
framelength = ETH_ERROR;
printf("Error:recv error frame,status：0x%08x.\r\n",DMARxDescToGet->Status);
printf("ETH->DMASR：0x%x.\r\n", ETH->DMASR);
}
DMARxDescToGet->Status|=ETH_DMARxDesc_OWN;
frame.length = framelength;
frame.descriptor = DMARxDescToGet;
/* Update the ETHERNET DMA global Rx descriptor with next Rx decriptor */
/* Chained Mode */
/* Selects the next DMA Rx descriptor list for next buffer to read */
DMARxDescToGet = (ETH_DMADESCTypeDef*) (DMARxDescToGet->Buffer2NextDescAddr);
/* Return Frame */
return (frame);
}
调试打印信息如下：
I/elog EasyLogger V2.2.99 is initialize success. I/APP.MAIN CPU Freq:144000000 Hz I/APP.MAIN Kernel Version:V10.4.6 I/APP.MAIN HardWare Version: VA3 I/APP.MAIN SoftWare Version: V1.2.7 I/ip101 IP101G初始化成功,ID:2430C54 I/APP.ETH The network cable is not connected! I/ethernet 网络模式切换为:100M全双工 I/APP.ETH The network cable is now connected! I/APP.ETH ip_addr = 192.168.0.193 I/APP.ETH netmask = 255.255.255.0 I/APP.ETH gateway = 192.168.0.1 Error:recv error frame,status:0x004e8b20. ETH->DMASR:0x690414. Error:recv error frame,status:0x00468b20. ETH->DMASR:0x690414.
接收描述符状态值0x004e8b20，说明了ES标志置位了，也就是OE置位了，即溢出错误了。请问下，出现这种问题需要怎么去解决？
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