예제 #1
0
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);
  }
}
예제 #2
0
/*******************************************************************************
* 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 */