SDMMC异常异常异常

发布于 2020-12-08 04:00:18 浏览：2399 订阅该版

始终不会使用SDMMC驱动，SDMMC一直失败,接收到mmcsd_detect_mb之后，一直都是错误，甚至无法进入init_mmc，更别说什么注册块设备了，什么添加文件系统。有没有人用过或是知道怎么回事，硬件上是没有问题的，使用HAL库单独可读可写。

```C
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
<3>Jan  1 00:00:00 drv.sdio: wait cmd completed timeout
```

```C
static void rthw_sdio_wait_completed(struct rthw_sdio *sdio)
{
    rt_uint32_t status;
    struct rt_mmcsd_cmd *cmd = sdio->pkg->cmd;
    struct stm32_sdio *hw_sdio = sdio->sdio_des.hw_sdio;

if (rt_event_recv(&sdio->event, 0xffffffff, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
                      rt_tick_from_millisecond(5000), &status) != RT_EOK)
    {
        LOG_E("wait cmd completed timeout");
        cmd->err = -RT_ETIMEOUT;
        return;
    }

cmd->resp[0] = hw_sdio->resp1;
    if (resp_type(cmd) == RESP_R2)
    {
        cmd->resp[1] = hw_sdio->resp2;
        cmd->resp[2] = hw_sdio->resp3;
        cmd->resp[3] = hw_sdio->resp4;
    }

if (status & SDIO_ERRORS)
    {
        if ((status & SDMMC_STA_CCRCFAIL) && (resp_type(cmd) & (RESP_R3 | RESP_R4)))
        {
            cmd->err = RT_EOK;
        }
        else
        {
            cmd->err = -RT_ERROR;
        }
    }
    else
    {
        cmd->err = RT_EOK;
    }

if (cmd->err == RT_EOK)
    {
        LOG_D("sta:0x%08X [%08X %08X %08X %08X]", status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
    }
    else
    {
        LOG_D("send command error = %d", cmd->err);
    }
}
```