USB

USB HOST 读取U盘

发布于 2020-07-08 10:16:26 浏览：2034 订阅该版

3 个回答

lizhen9880 认证专家 2020-07-09

这家伙很懒，什么也没写！

蔡海允 2020-07-11

这家伙很懒，什么也没写！

蔡海允 2020-07-11

这家伙很懒，什么也没写！

后面发现，程序卡在了drv_usbh.c
static int drv_pipe_xfer(upipe_t pipe, rt_uint8_t token, void *buffer, int nbytes, int timeouts)
{
    int timeout = timeouts;

while (1)
    {
        if (!connect_status)
        {
            return -1;
        }

rt_completion_init(&urb_completion);
        HAL_HCD_HC_SubmitRequest(&stm32_hhcd_fs, pipe->pipe_index, (pipe->ep.bEndpointAddress & 0x80) >> 7,
                pipe->ep.bmAttributes, token, buffer, nbytes, 0);
        rt_completion_wait(&urb_completion, timeout);
        rt_thread_mdelay(10);
        if (HAL_HCD_HC_GetState(&stm32_hhcd_fs, pipe->pipe_index) == HC_NAK)
        {
            RT_DEBUG_LOG(RT_DEBUG_USB, ("nak\n"));
            if (pipe->ep.bmAttributes == USB_EP_ATTR_INT)
            {
                rt_thread_delay(
                        (pipe->ep.bInterval * RT_TICK_PER_SECOND / 1000) > 0 ?
                                (pipe->ep.bInterval * RT_TICK_PER_SECOND / 1000) : 1);
            }
            HAL_HCD_HC_Halt(&stm32_hhcd_fs, pipe->pipe_index);
            HAL_HCD_HC_Init(&stm32_hhcd_fs, pipe->pipe_index, pipe->ep.bEndpointAddress, pipe->inst->address,
            USB_OTG_SPEED_FULL, pipe->ep.bmAttributes, pipe->ep.wMaxPacketSize);
            continue;
        }
        else if (HAL_HCD_HC_GetState(&stm32_hhcd_fs, pipe->pipe_index) == HC_STALL)
        {
            RT_DEBUG_LOG(RT_DEBUG_USB, ("stall\n"));
            pipe->status = UPIPE_STATUS_STALL;
            if (pipe->callback != RT_NULL)
            {
                pipe->callback(pipe);
            }
            return -1;
        }
        else if (HAL_HCD_HC_GetState(&stm32_hhcd_fs, pipe->pipe_index) == URB_ERROR)
        {
            RT_DEBUG_LOG(RT_DEBUG_USB, ("error\n"));
            pipe->status = UPIPE_STATUS_ERROR;
            if (pipe->callback != RT_NULL)
            {
                pipe->callback(pipe);
            }
            return -1;
        }
        else if (URB_DONE == HAL_HCD_HC_GetURBState(&stm32_hhcd_fs, pipe->pipe_index))
        {
            RT_DEBUG_LOG(RT_DEBUG_USB, ("ok\n"));
            pipe->status = UPIPE_STATUS_OK;
            if (pipe->callback != RT_NULL)
            {
                pipe->callback(pipe);
            }
            size_t size = HAL_HCD_HC_GetXferCount(&stm32_hhcd_fs, pipe->pipe_index);
            if (pipe->ep.bEndpointAddress & 0x80)
            {
                return size;
            }
            else if (pipe->ep.bEndpointAddress & 0x00)
            {
                return size;
            }
            return nbytes;
        }

continue;
    }
}
函数里面了。我看一些人说是设备描述符超过64字节，这样就出问题了。