/**
* @brief Stall an endpoint.
* @param pdev: device instance
* @param epnum: endpoint address
* @retval : status
*/
uint32_t DCD_EP_Stall (USB_CORE_HANDLE *pdev, uint8_t epnum)
{
USB_EP *ep;
if ((0x80 & epnum) == 0x80)
{
ep = &pdev->dev.in_ep[epnum & 0x7F];
}
else
{
ep = &pdev->dev.out_ep[epnum];
}
if (ep->num ==0)
{
/* This macro sets STALL status for RX & TX*/
_SetEPRxTxStatus(ep->num,EP_RX_STALL,EP_TX_STALL);
/*Endpoint is stalled */
ep->is_stall = 1;
return USB_OK;
}
if (ep->is_in)
{
/* IN endpoint */
ep->is_stall = 1;
/* IN Endpoint stalled */
SetEPTxStatus(ep->num , EP_TX_STALL);
}
else
{
ep->is_stall = 1;
/* OUT Endpoint stalled */
SetEPRxStatus(ep->num , EP_RX_STALL);
}
return USB_OK;
}
/*******************************************************************************
* Function Name : CTR_LP.
* Description : Low priority Endpoint Correct Transfer interrupt's service
* routine.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void CTR_LP(void)
{
volatile uint16_t wEPVal = 0;
/* stay in loop while pending interrupts */
while (((wIstr = _GetISTR()) & ISTR_CTR) != 0)
{
/* extract highest priority endpoint number */
EPindex = (uint8_t)(wIstr & ISTR_EP_ID);
if (EPindex == 0)
{
/* Decode and service control endpoint interrupt */
/* calling related service routine */
/* (Setup0_Process, In0_Process, Out0_Process) */
/* save RX & TX status */
/* and set both to NAK */
SaveRState = _GetENDPOINT(ENDP0);
SaveTState = SaveRState & EPTX_STAT;
SaveRState &= EPRX_STAT;
_SetEPRxTxStatus(ENDP0,EP_RX_NAK,EP_TX_NAK);
/* DIR bit = origin of the interrupt */
if ((wIstr & ISTR_DIR) == 0)
{
/* DIR = 0 */
/* DIR = 0 => IN int */
/* DIR = 0 implies that (EP_CTR_TX = 1) always */
_ClearEP_CTR_TX(ENDP0);
In0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
return;
}
else
{
/* DIR = 1 */
/* DIR = 1 & CTR_RX => SETUP or OUT int */
/* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */
wEPVal = _GetENDPOINT(ENDP0);
if ((wEPVal &EP_SETUP) != 0)
{
_ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */
Setup0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
return;
}
else if ((wEPVal & EP_CTR_RX) != 0)
{
_ClearEP_CTR_RX(ENDP0);
Out0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxTxStatus(ENDP0,SaveRState,SaveTState);
return;
}
}
}/* if(EPindex == 0) */
else
{
/* Decode and service non control endpoints interrupt */
/* process related endpoint register */
wEPVal = _GetENDPOINT(EPindex);
if ((wEPVal & EP_CTR_RX) != 0)
{
/* clear int flag */
_ClearEP_CTR_RX(EPindex);
/* call OUT service function */
(*pEpInt_OUT[EPindex-1])();
} /* if((wEPVal & EP_CTR_RX) */
if ((wEPVal & EP_CTR_TX) != 0)
{
/* clear int flag */
_ClearEP_CTR_TX(EPindex);
/* call IN service function */
(*pEpInt_IN[EPindex-1])();
} /* if((wEPVal & EP_CTR_TX) != 0) */
}/* if(EPindex == 0) else */
}/* while(...) */
}
