SDIO总线挂载失败

10 GD32F450 SDIO驱动SD卡，可以识别SD卡，无法在sd上挂载文件系统

发布于 2021-08-28 16:23:05 浏览：4064 订阅该版

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alexyzhov 2021-09-13

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出出啊 2021-08-28

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SukTry 2021-08-29

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```
/**
  * @brief  This function send command.
  * @param  sdio  rthw_sdio
  * @param  pkg   sdio package
  * @retval None
  */
static void rthw_sdio_send_command(struct rthw_sdio *sdio, struct sdio_pkg *pkg)
{
    struct rt_mmcsd_cmd *cmd = pkg->cmd;
    struct rt_mmcsd_data *data = cmd->data;
    struct stm32_sdio *hw_sdio = sdio->sdio_des.hw_sdio;
    rt_uint32_t reg_cmd;

/* save pkg */
    sdio->pkg = pkg;

LOG_D("CMD:%d ARG:0x%08x RES:%s%s%s%s%s%s%s%s%s rw:%c len:%d blksize:%d",
          cmd->cmd_code,
          cmd->arg,
          resp_type(cmd) == RESP_NONE ? "NONE"  : "",
          resp_type(cmd) == RESP_R1  ? "R1"  : "",
          resp_type(cmd) == RESP_R1B ? "R1B"  : "",
          resp_type(cmd) == RESP_R2  ? "R2"  : "",
          resp_type(cmd) == RESP_R3  ? "R3"  : "",
          resp_type(cmd) == RESP_R4  ? "R4"  : "",
          resp_type(cmd) == RESP_R5  ? "R5"  : "",
          resp_type(cmd) == RESP_R6  ? "R6"  : "",
          resp_type(cmd) == RESP_R7  ? "R7"  : "",
          data ? (data->flags & DATA_DIR_WRITE ?  'w' : 'r') : '-',
          data ? data->blks * data->blksize : 0,
          data ? data->blksize : 0
         );

/* config cmd reg */
    reg_cmd = cmd->cmd_code | HW_SDIO_CPSM_ENABLE;
    if (resp_type(cmd) == RESP_NONE)
        reg_cmd |= HW_SDIO_RESPONSE_NO;
    else if (resp_type(cmd) == RESP_R2)
        reg_cmd |= HW_SDIO_RESPONSE_LONG;
    else
        reg_cmd |= HW_SDIO_RESPONSE_SHORT;

/* config data reg */
    if (data != RT_NULL)
    {
        rt_uint32_t dir = 0;
        rt_uint32_t size = data->blks * data->blksize;
        int order;

hw_sdio->dctrl = 0;
        hw_sdio->dtimer = HW_SDIO_DATATIMEOUT;
        hw_sdio->dlen = size;
        order = get_order(data->blksize);
        dir = (data->flags & DATA_DIR_READ) ? HW_SDIO_TO_HOST : 0;
        hw_sdio->dctrl = HW_SDIO_IO_ENABLE | (order << 4) | dir;
    }
		LOG_I(">>>> 0  HW_SDIO STA [%x]  <<<<",hw_sdio->sta);
    /* transfer config */
    if (data != RT_NULL)
    {
        rthw_sdio_transfer_by_dma(sdio, pkg);
    }
		LOG_I(">>>> 1  HW_SDIO STA [%x]  <<<<",hw_sdio->sta);
    /* open irq */
    hw_sdio->mask |= HW_SDIO_IT_CMDSENT | HW_SDIO_IT_CMDREND | HW_SDIO_ERRORS;
    if (data != RT_NULL)
    {
        hw_sdio->mask |= HW_SDIO_IT_DATAEND;
    }
		LOG_I(">>>> 2  HW_SDIO STA [%x]  <<<<",hw_sdio->sta);
    /* send cmd */
    hw_sdio->arg = cmd->arg;
    hw_sdio->cmd = reg_cmd;

/* wait completed */
    rthw_sdio_wait_completed(sdio);
		LOG_I(">>>> 3  HW_SDIO STA [%x]  <<<<",hw_sdio->sta);
    /* Waiting for data to be sent to completion */
    if (data != RT_NULL)
    {
        volatile rt_uint32_t count = SDIO_TX_RX_COMPLETE_TIMEOUT_LOOPS;

while (count && (hw_sdio->sta & (HW_SDIO_IT_TXACT | HW_SDIO_IT_RXACT)))
        {
            count--;
        }
				LOG_I(">>>> 4  HW_SDIO STA [%x]  <<<<",hw_sdio->sta);
        **if ((count == 0) || (hw_sdio->sta & HW_SDIO_ERRORS))
        {
            cmd->err = -RT_ERROR;
        }**
    }

/* close irq, keep sdio irq */
    hw_sdio->mask = hw_sdio->mask & HW_SDIO_IT_SDIOIT ? HW_SDIO_IT_SDIOIT : 0x00;

/* clear pkg */
    sdio->pkg = RT_NULL;
}
```
在加粗的地方，hw_sdio->sta这个数值被修改，导致的cdm->err，请问下是sta是怎么被修改的啊？