Function rt_ecm_eth_rx

components/legacy/usb/usbdevice/class/ecm.c:368–405

#endif

struct pbuf *rt_ecm_eth_rx(rt_device_t dev)
{
    struct pbuf* p = RT_NULL;
    rt_uint32_t offset = 0;
    rt_ecm_eth_t ecm_eth_dev = (rt_ecm_eth_t)dev;
    if(ecm_eth_dev->rx_size != 0)
    {
        /* allocate buffer */
        p = pbuf_alloc(PBUF_RAW, ecm_eth_dev->rx_size, PBUF_RAM);
        if (p != RT_NULL)
        {
            struct pbuf* q;

            for (q = p; q != RT_NULL; q= q->next)
            {
                /* Copy the received frame into buffer from memory pointed by the current ETHERNET DMA Rx descriptor */
                rt_memcpy(q->payload,
                        (rt_uint8_t *)((ecm_eth_dev->rx_buffer) + offset),
                        q->len);
                offset += q->len;
            }
        }
    }

    {
        if(ecm_eth_dev->func->device->state == USB_STATE_CONFIGURED)
        {
            ecm_eth_dev->rx_size = 0;
            ecm_eth_dev->rx_offset = 0;
            ecm_eth_dev->eps.ep_out->request.buffer = ecm_eth_dev->eps.ep_out->buffer;
            ecm_eth_dev->eps.ep_out->request.size = EP_MAXPACKET(ecm_eth_dev->eps.ep_out);
            ecm_eth_dev->eps.ep_out->request.req_type = UIO_REQUEST_READ_BEST;
            rt_usbd_io_request(ecm_eth_dev->func->device, ecm_eth_dev->eps.ep_out, &ecm_eth_dev->eps.ep_out->request);
        }
    }

    return p;
}

rt_err_t rt_ecm_eth_tx(rt_device_t dev, struct pbuf* p)
{