void PIOS_USBHOOK_RegisterEpOutCallback(uint8_t epnum, uint16_t max_len, pios_usbhook_epcb cb, uintptr_t context)
{
PIOS_Assert(epnum < NELEMENTS(usb_epout_table));
PIOS_Assert(cb);
usb_epout_table[epnum].cb = cb;
usb_epout_table[epnum].context = context;
usb_epout_table[epnum].max_len = max_len;
DCD_EP_Open(&pios_usb_otg_core_handle,
epnum,
max_len,
USB_OTG_EP_INT);
/*
* FIXME do not hardcode endpoint type
*/
/*
* Make sure we refuse OUT transactions until we explicitly
* connect a receive buffer with PIOS_USBHOOK_EndpointRx().
*
* Without this, the ST USB code will receive on this endpoint
* and blindly write the data to a NULL pointer which will
* have the side effect of placing the internal flash into an
* errored state. Address 0x0000_0000 is aliased into internal
* flash via the "Section 2.4 Boot configuration" BOOT0/1 pins.
*/
DCD_SetEPStatus(&pios_usb_otg_core_handle,
epnum,
USB_OTG_EP_RX_NAK);
}
/**********************************************************************************************************
*函 数 名: Usb_Send
*功能说明: USB发送数据
*形 参: 发送数据缓冲区指针 数据长度
*返 回 值: 无
**********************************************************************************************************/
void Usb_Send(uint8_t *dataToSend, uint8_t length)
{
if(connectFlag)
{
DCD_EP_Tx(&USB_OTG_dev, 1, dataToSend, length);
DCD_SetEPStatus(&USB_OTG_dev,1, USB_OTG_EP_TX_VALID);
}
errorCheckCnt = 0;
}
static inline int usbd_cdc_Start_Rx(void *pdev)
{
/* USB_Rx_Buffer_length is used here to keep track of
* available _contiguous_ buffer space in USB_Rx_Buffer.
*/
uint32_t USB_Rx_length;
if (USB_Rx_Buffer_head >= USB_Rx_Buffer_tail)
USB_Rx_Buffer_length = USB_RX_BUFFER_SIZE;
USB_Rx_length = ring_space_contig(USB_Rx_Buffer_length, USB_Rx_Buffer_head, USB_Rx_Buffer_tail);
if (USB_Rx_length < CDC_DATA_OUT_PACKET_SIZE) {
USB_Rx_length = ring_space_wrapped(USB_Rx_Buffer_length, USB_Rx_Buffer_head, USB_Rx_Buffer_tail);
if (USB_Rx_length < CDC_DATA_OUT_PACKET_SIZE) {
if (USB_Rx_State) {
USB_Rx_State = 0;
DCD_SetEPStatus(pdev, CDC_OUT_EP, USB_OTG_EP_TX_NAK);
}
return 0;
}
USB_Rx_Buffer_length = USB_Rx_Buffer_head;
USB_Rx_Buffer_head = 0;
if (USB_Rx_Buffer_tail == USB_Rx_Buffer_length)
USB_Rx_Buffer_tail = 0;
}
if (!USB_Rx_State) {
USB_Rx_State = 1;
DCD_SetEPStatus(pdev, CDC_OUT_EP, USB_OTG_EP_TX_VALID);
}
DCD_EP_PrepareRx(pdev,
CDC_OUT_EP,
USB_Rx_Buffer + USB_Rx_Buffer_head,
CDC_DATA_OUT_PACKET_SIZE);
return 1;
}
static uint8_t PIOS_USBHOOK_CLASS_DataOut(void *pdev, uint8_t epnum)
{
/* Remove the direction bit so we can use this as an index */
uint8_t epnum_idx = epnum & 0x7F;
if ((epnum_idx < NELEMENTS(usb_epout_table)) && usb_epout_table[epnum_idx].cb) {
struct usb_ep_entry *ep = &(usb_epout_table[epnum_idx]);
if (!ep->cb(ep->context, epnum_idx, ep->max_len)) {
/* NOTE: use real endpoint number including direction bit */
DCD_SetEPStatus(pdev, epnum, USB_OTG_EP_RX_NAK);
}
}
return USBD_OK;
}