void USBglobalInterruptHandler() {
uint16_t pending;
pending = _GetCNTR() & _GetISTR();
if (pending & ISTR_CTR) {
uint16_t EPindex, EPflags, EPnum;
EPindex = _GetISTR() & ISTR_EP_ID;
EPflags = _GetENDPOINT(EPindex);
EPnum = EPflags & EPADDR_FIELD;
/* The EP_SETUP bit implies the EP_CTR_RX bit. */
if (EPflags & EP_SETUP) {
_ClearEP_CTR_RX(EPindex);
USBDtransfer(EPnum, PID_SETUP);
}
else if (EPflags & EP_CTR_RX) {
_ClearEP_CTR_RX(EPindex);
USBDtransfer(EPnum, PID_OUT);
}
else if (EPflags & EP_CTR_TX) {
_ClearEP_CTR_TX(EPindex);
if (EPnum != 0)
USBDcontinueInTransfer(EPnum);
USBDtransfer(EPnum, PID_IN);
}
}
if (pending & ISTR_DOVR) {
_SetISTR(CLR_DOVR);
}
if (pending & ISTR_ERR) {
_SetISTR(CLR_ERR);
}
if (pending & ISTR_SUSP) {
USBDsuspend();
PWRreduce();
/* The ISTR_SUSP bit must be cleared after
setting of the CNTR_FSUSP bit. */
_SetISTR(CLR_SUSP);
}
if (pending & ISTR_WKUP) {
_SetISTR(CLR_WKUP);
PWRresume();
USBDwakeup();
}
if (pending & ISTR_RESET) {
_SetISTR(CLR_RESET);
USBDreset(FULL_SPEED);
}
if (pending & ISTR_SOF) {
_SetISTR(CLR_SOF);
USBDsof(_GetFNR() & FNR_FN);
}
if (pending & ISTR_ESOF) {
_SetISTR(CLR_ESOF);
}
}
/*******************************************************************************
* Function Name : USB_Istr
* Description : ISTR events interrupt service routine
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
void USB_Istr(void)
{
uint32_t i=0;
__IO uint32_t EP[8];
wIstr = _GetISTR();
#if (IMR_MSK & ISTR_SOF)
if (wIstr & ISTR_SOF & wInterrupt_Mask)
{
_SetISTR((uint16_t)CLR_SOF);
bIntPackSOF++;
#ifdef SOF_CALLBACK
SOF_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_CTR)
if (wIstr & ISTR_CTR & wInterrupt_Mask)
{
/* servicing of the endpoint correct transfer interrupt */
/* clear of the CTR flag into the sub */
CTR_LP();
#ifdef CTR_CALLBACK
CTR_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_RESET)
if (wIstr & ISTR_RESET & wInterrupt_Mask)
{
_SetISTR((uint16_t)CLR_RESET);
Device_Property.Reset();
#ifdef RESET_CALLBACK
RESET_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_DOVR)
if (wIstr & ISTR_DOVR & wInterrupt_Mask)
{
_SetISTR((uint16_t)CLR_DOVR);
#ifdef DOVR_CALLBACK
DOVR_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_ERR)
if (wIstr & ISTR_ERR & wInterrupt_Mask)
{
_SetISTR((uint16_t)CLR_ERR);
#ifdef ERR_CALLBACK
ERR_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_WKUP)
if (wIstr & ISTR_WKUP & wInterrupt_Mask)
{
_SetISTR((uint16_t)CLR_WKUP);
Resume(RESUME_EXTERNAL);
#ifdef WKUP_CALLBACK
WKUP_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_SUSP)
if (wIstr & ISTR_SUSP & wInterrupt_Mask)
{
/* check if SUSPEND is possible */
if (fSuspendEnabled)
{
Suspend();
}
else
{
/* if not possible then resume after xx ms */
Resume(RESUME_LATER);
}
/* clear of the ISTR bit must be done after setting of CNTR_FSUSP */
_SetISTR((uint16_t)CLR_SUSP);
#ifdef SUSP_CALLBACK
SUSP_Callback();
#endif
}
#endif
/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#if (IMR_MSK & ISTR_ESOF)
if (wIstr & ISTR_ESOF & wInterrupt_Mask)
{
/* clear ESOF flag in ISTR */
_SetISTR((uint16_t)CLR_ESOF);
if ((_GetFNR()&FNR_RXDP)!=0)
{
/* increment ESOF counter */
esof_counter ++;
/* test if we enter in ESOF more than 3 times with FSUSP =0 and RXDP =1=>> possible missing SUSP flag*/
if ((esof_counter >3)&&((_GetCNTR()&CNTR_FSUSP)==0))
{
/* this a sequence to apply a force RESET*/
/*Store CNTR value */
wCNTR = _GetCNTR();
/*Store endpoints registers status */
for (i=0;i<8;i++) EP[i] = _GetENDPOINT(i);
/*apply FRES */
wCNTR|=CNTR_FRES;
_SetCNTR(wCNTR);
/*clear FRES*/
wCNTR&=~CNTR_FRES;
_SetCNTR(wCNTR);
/*disable ESOF interrupt*/
//wCNTR &= ~CNTR_ESOFM;
//_SetCNTR(wCNTR);
/*poll for RESET flag in ISTR*/
while((_GetISTR()&ISTR_RESET) == 0);
/* clear RESET flag in ISTR */
_SetISTR((uint16_t)CLR_RESET);
/*restore Enpoints*/
for (i=0;i<8;i++)
_SetENDPOINT(i, EP[i]);
esof_counter = 0;
}
}
else
{
esof_counter = 0;
}
/* resume handling timing is made with ESOFs */
Resume(RESUME_ESOF); /* request without change of the machine state */
#ifdef ESOF_CALLBACK
ESOF_Callback();
#endif
}
#endif
/*disable ESOF interrupt*/
wCNTR = _GetCNTR();
wCNTR &= ~CNTR_ESOFM;
_SetCNTR(wCNTR);
} /* USB_Istr */