Cannot receive Data through USB HID from PC

RE: Cannot receive Data through USB HID from PC

Amanda Hsieh — Tue, 30 Mar 2021 09:03:05 GMT

Hi,

Please create a new support case for the new issue. This is away from the original scope.

Please note that due to the Easter holiday, we're low on staff, so somewhat lower response times must be expected until April 6th. Sorry about the inconvenience.

-Amanda H.

RE: Cannot receive Data through USB HID from PC

nicholas_cage — Sat, 27 Mar 2021 09:21:57 GMT

Thanks for you reply，I ran into another problem。The first packet of data sent by the PC was successfully received, and the second packet of data failed to be received。

The packet capture tool shows that the second packet of data was unsuccessful, and the device entered the stall pid.

Function returns failed in p_ep_conf->event_handler() function ( in app_usbd.c)

void app_usbd_event_execute(app_usbd_internal_evt_t const * const p_event)
{
    ASSERT(NULL != m_p_first_cinst);
    /* If no event queue is implemented, it has to be ensured that this function is never called
     * from the context higher than USB interrupt level
     * If queue is implemented it would be called always from Thread level
     * if the library is used correctly.
     * NOTE: Higher interrupt level -> lower priority value.
     */
    ASSERT(USBD_CONFIG_IRQ_PRIORITY <= current_int_priority_get());
    bsp_board_led_invert(2);
    /* Note - there should never be situation that event is generated on disconnected endpoint */
    switch (p_event->type)
    {
       
        ....
      
        case APP_USBD_EVT_DRV_EPTRANSFER:
        {
            app_usbd_ep_conf_t const * p_ep_conf =
                    app_usbd_ep_conf_access(p_event->drv_evt.data.eptransfer.ep);
            ASSERT(NULL != p_ep_conf->p_cinst);
            ASSERT(NULL != p_ep_conf->event_handler);

    	if (NRF_DRV_USBD_EPOUT4 == p_event->drv_evt.data.eptransfer.ep) {
    			static uint8_t receive_buffer[64];
    			static nrf_drv_usbd_ep_transfer_t usb_tranfer;
    		if (NRF_USBD_EP_WAITING == p_event->drv_evt.data.eptransfer.status) {
    				usb_tranfer.p_data.rx = receive_buffer;
    				usb_tranfer.size = 64;
    				int ret = nrf_drv_usbd_ep_transfer(p_event->drv_evt.data.eptransfer.ep, &usb_tranfer);
    
    		} else if (NRF_USBD_EP_OK == p_event->drv_evt.data.eptransfer.status) {
    			size_t size = 0;
    			nrf_drv_usbd_ep_status_get(p_event->drv_evt.data.eptransfer.ep, &size);
    				printf("Received %d bytes:\n", size);
    				for (int i = 0; i < size; i++) printf("0x%02X ", receive_buffer[i]);
    				printf("\n");
    		} else {
    			printf("Transfer failed on EPOUT1: %d\n", p_event->drv_evt.data.eptransfer.status);
    		}
    	}       

        
            if (NRF_SUCCESS != p_ep_conf->event_handler(p_ep_conf->p_cinst,
                                                       (app_usbd_complex_evt_t const *)p_event))   // not success here
            {
                /* If error returned, every bulk/interrupt endpoint would be stalled */
                if (!(0 == NRF_USBD_EP_NR_GET(p_event->drv_evt.data.eptransfer.ep) ||
                   NRF_USBD_EPISO_CHECK(p_event->drv_evt.data.eptransfer.ep)))
                {
                    nrf_drv_usbd_ep_stall(p_event->drv_evt.data.eptransfer.ep); 
                }
            }
            break;
        }
        .... 

        default:
            ASSERT(0);
            break;
    }
}

Please tell me how to solve this problem.

RE: Cannot receive Data through USB HID from PC

Amanda Hsieh — Tue, 23 Mar 2021 14:15:30 GMT

Check out this post.

-Amanda H.

RE: Cannot receive Data through USB HID from PC

nicholas_cage — Tue, 23 Mar 2021 13:29:15 GMT

I noticed that when the PC sent data, the program gave a warning in nrfx_usbd.c line 1192。

（NRFX_USBD_EP_WAITING, /**< Data received, no buffer prepared already - waiting for configured transfer. */)

SDK17.02

/**
 * @brief React on data transfer finished.
 *
 * Auxiliary internal function.
 * @param ep     Endpoint number.
 * @param bitpos Bit position for selected endpoint number.
 */
static void usbd_ep_data_handler(nrfx_usbd_ep_t ep, uint8_t bitpos)
{
     ...
  
    if (NRF_USBD_EPIN_CHECK(ep))
    {
       ....
    }
    else
    {
        /* OUT endpoint (Host -> Device) */
        if (0 == (m_ep_dma_waiting & (1U << bitpos)))
        {
            NRFX_LOG_DEBUG("USBD event: EndpointData: Out waiting");
            /* No buffer prepared - send event to the application */
            NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_WAITING);  // here
            m_event_handler(&evt);
        }
    }
}

I want to know how to set the receive buffer of the endpoint ?