/*******************************************************************************
* 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(...) */
}
/*******************************************************************************
* Function Name : OTGD_FS_Handle_InEP_ISR
* Description : Handles all IN endpoints interrupts.
* Output : None
* Return : status
*******************************************************************************/
uint32_t OTGD_FS_Handle_InEP_ISR(void)
{
USB_OTG_DIEPINTx_TypeDef diepint;
uint32_t ep_intr = 0;
uint32_t epnum = 0;
USB_OTG_EP *ep;
uint32_t fifoemptymsk = 0;
diepint.d32 = 0;
ep_intr = OTGD_FS_ReadDevAllInEPItr();
while ( ep_intr )
{
if (ep_intr&0x1) /* In ITR */
{
ep = PCD_GetInEP(epnum);
diepint.d32 = PCD_ReadDevInEP(ep); /* Get In ITR status */
if ( diepint.b.xfercompl )
{
fifoemptymsk = 0x1 << ep->num;
USB_OTG_MODIFY_REG32(&USB_OTG_FS_regs.DEV->DIEPEMPMSK, fifoemptymsk, 0);
/* Clear the Interrupt flag */
CLEAR_IN_EP_INTR(epnum, xfercompl);
if (epnum == 0)
{
/* Call the core IN process for EP0 */
In0_Process();
/* before terminate set Tx & Rx status */
OTG_DEV_SetEPRxStatus(epnum, SaveRState);
OTG_DEV_SetEPTxStatus(epnum, SaveTState);
}
else
{
/* Call the relative IN endpoint callback */
(*pEpInt_IN[epnum -1])();
}
}
if ( diepint.b.timeout )
{
CLEAR_IN_EP_INTR(epnum, timeout);
}
if (diepint.b.intktxfemp)
{
CLEAR_IN_EP_INTR(epnum, intktxfemp);
}
if (diepint.b.inepnakeff)
{
CLEAR_IN_EP_INTR(epnum, inepnakeff);
}
if (diepint.b.txfempty)
{
if ((epnum == 0) || (OTG_DEV_GetEPTxStatus(epnum) == DEV_EP_TX_VALID))
{
PCD_WriteEmptyTxFifo(epnum);
}
CLEAR_IN_EP_INTR(epnum, txfempty);
}
if ( diepint.b.epdis)
{
/* Reset Endpoint Frame ID to 0 */
ep->even_odd_frame = 0;
CLEAR_IN_EP_INTR(epnum, epdis);
}
}
epnum++;
ep_intr >>= 1;
}
/* Call user function */
INTR_INEPINTR_Callback();
return 1;
}
static void handle_in0(void) {
In0_Process();
}
/*******************************************************************************
* Function Name : CTR_LP.
* Description : Low priority Endpoint Correct Transfer interrupt's service
* routine.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void CTR_LP(void) {
__IO uint16_t wEPVal = 0;
// stay in loop while pending interrupts
while ((wIstr = *ISTR) & ISTR_CTR) {
// 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 => 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 & 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;
}
}
} 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_TX) != 0) {
// clear int flag
ClearEP_CTR_TX(EPindex);
// call IN service function
(*pEpInt_IN[EPindex-1])();
}
}
}
}
/*******************************************************************************
* Function Name : CTR_LP.
* Description : Low priority Endpoint Correct Transfer interrupt's service
* routine.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void CTR_LP(void)
{
u32 wEPVal = 0;
// wIstr = *ISTR;
/* stay in loop while pending ints */
while (((wIstr = (*ISTR)) & ISTR_CTR) != 0) //正确传输
{
_SetISTR((u16)CLR_CTR); /* clear CTR flag 清正确传输中断*/
/* extract highest priority endpoint number */
EPindex = (u8)(wIstr & ISTR_EP_ID);//ISTR_EP_ID (0x000F) 这个只读，所以与0X000F&
if (EPindex == 0) //如果是端点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 = _GetEPRxStatus(ENDP0);
SaveTState = _GetEPTxStatus(ENDP0);
_SetEPRxStatus(ENDP0, EP_RX_NAK); //当一次正确的OUT或SETUP数据传输完成后(CTR_RX=1)，
_SetEPTxStatus(ENDP0, EP_TX_NAK); //硬件会自动设置此位为NAK状态，
//使应用程序有足够的时间在处理完当前传输的数据后，
//响应下一个数据分组。
/* DIR bit = origin of the interrupt */
if ((wIstr & ISTR_DIR) == 0) //0x0010 如果是输入
{
/* 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 */
_SetEPRxStatus(ENDP0, SaveRState);
_SetEPTxStatus(ENDP0, SaveTState);
return;
}
else //输出
{
/* DIR = 1 */
/* DIR = 1 & CTR_RX => SETUP or OUT int */
/* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */
//EP0的值
wEPVal =(u16)(*((volatile unsigned *)(0x40005C00L) + ENDP0));
if ((wEPVal & EP_CTR_TX) != 0) //硬件在一个正确的IN分组传输完成后置位
{
_ClearEP_CTR_TX(ENDP0);
In0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxStatus(ENDP0, SaveRState); //SaveTState=EP_TX_STALL; 在In0_Process（）
_SetEPTxStatus(ENDP0, SaveTState); //SaveTState=EP_TX_STALL; 在In0_Process（）
return;
}
//控制传输由3个阶段组成，首先是主机发送SETUP分组的SETUP阶段，
//然后是主机发送零个或多个数据的数据阶段，最后是状态阶段，由与数据阶段方向相反的数据分组构成
//据SETUP分组的相应字段决定后面的传输是IN还是OUT。
else if ((wEPVal &EP_SETUP) != 0) //在USB模块收到一个正确的SETUP分组后由硬件置位
{
_ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */
Setup0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxStatus(ENDP0, SaveRState);
_SetEPTxStatus(ENDP0, SaveTState);
return;
}
else if ((wEPVal & EP_CTR_RX) != 0)
{
_ClearEP_CTR_RX(ENDP0);
Out0_Process();
/* before terminate set Tx & Rx status */
_SetEPRxStatus(ENDP0, SaveRState);
_SetEPTxStatus(ENDP0, SaveTState);
return;
}
}
}/* if(EPindex == 0) */
else
{
/* Decode and service non control endpoints interrupt */
/* process related endpoint register */
wEPVal = (u16)(*((volatile unsigned *)(0x40005C00L) + 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(...) */
}