bulkloop.c

提供了usb接口fx2芯片的编程。从io输入到后来的差分信号输出。都给了详细的例子

         EP0BCH = 0;
         EP0BCL = 8;
        break;

     case DWWRITE:    //single write,data in SETUPDAT[2],ram address in SETUPDAT[4]
	      for(j = 2;j < 6;j++)
		  {
           tmp1 = SETUPDAT[j];
		 
		   for(i=0;i<4;i++)
		   {
		   tmp2 = ((tmp1)&(1<<i));
		   tmp3 |= (tmp2)<<(7-(i<<1));
		   }
		   for(i=4;i<8;i++)
		   {
		   tmp2 = ((tmp1)&(1<<i));
		   tmp3 |= (tmp2)>>((i<<1)-7);
		   }

		   IOB = tmp3;
           tmp3 = 0;
		   xfr_ctl = 1;
		   while(wr_ack !=1);
		   xfr_ctl = 0;
           SYNCDELAY;
           SYNCDELAY;

		  }
		    
           EP0BUF[0] = SETUPDAT[4];  //随便返回一个值，用于测试   
                                        
		   EP0BCH = 0;        //这两句保留      
           SYNCDELAY;                          
		   EP0BCL = 8;
           break;


     default:
        return(TRUE);
  }

  return(FALSE);
}

//-----------------------------------------------------------------------------
// USB Interrupt Handlers
//   The following functions are called by the USB interrupt jump table.
//-----------------------------------------------------------------------------

// Setup Data Available Interrupt Handler
void ISR_Sudav(void) interrupt 0
{
   GotSUD = TRUE;            // Set flag
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSUDAV;         // Clear SUDAV IRQ
}

// Setup Token Interrupt Handler
void ISR_Sutok(void) interrupt 0
{
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSUTOK;         // Clear SUTOK IRQ
}

void ISR_Sof(void) interrupt 0
{
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSOF;            // Clear SOF IRQ
}

void ISR_Ures(void) interrupt 0
{
   // whenever we get a USB reset, we should revert to full speed mode
   pConfigDscr = pFullSpeedConfigDscr;
   ((CONFIGDSCR xdata *) pConfigDscr)->type = CONFIG_DSCR;
   pOtherConfigDscr = pHighSpeedConfigDscr;
   ((CONFIGDSCR xdata *) pOtherConfigDscr)->type = OTHERSPEED_DSCR;
   Highspeed = 0;

   EZUSB_IRQ_CLEAR();
   USBIRQ = bmURES;         // Clear URES IRQ
}

void ISR_Susp(void) interrupt 0
{
 
  Sleep = TRUE;
  EZUSB_IRQ_CLEAR();
  USBIRQ = bmSUSP;

 }

void ISR_Highspeed(void) interrupt 0
{
   if (EZUSB_HIGHSPEED())
   {
      pConfigDscr = pHighSpeedConfigDscr;
      ((CONFIGDSCR xdata *) pConfigDscr)->type = CONFIG_DSCR;
      pOtherConfigDscr = pFullSpeedConfigDscr;
      ((CONFIGDSCR xdata *) pOtherConfigDscr)->type = OTHERSPEED_DSCR;
      Highspeed = 1;
   }

   EZUSB_IRQ_CLEAR();
   USBIRQ = bmHSGRANT;
}
void ISR_Ep0ack(void) interrupt 0
{
}
void ISR_Stub(void) interrupt 0
{
}
void ISR_Ep0in(void) interrupt 0
{
}
void ISR_Ep0out(void) interrupt 0
{
}
void ISR_Ep1in(void) interrupt 0
{
}
void ISR_Ep1out(void) interrupt 0
{
}
void ISR_Ep2inout(void) interrupt 0
{

 }
void ISR_Ep4inout(void) interrupt 0
{
}
void ISR_Ep6inout(void) interrupt 0
{ 
}
void ISR_Ep8inout(void) interrupt 0
{
}
void ISR_Ibn(void) interrupt 0
{
}
void ISR_Ep0pingnak(void) interrupt 0
{
}
void ISR_Ep1pingnak(void) interrupt 0
{
}
void ISR_Ep2pingnak(void) interrupt 0
{
}
void ISR_Ep4pingnak(void) interrupt 0
{
}
void ISR_Ep6pingnak(void) interrupt 0
{
}
void ISR_Ep8pingnak(void) interrupt 0
{
}
void ISR_Errorlimit(void) interrupt 0
{
}
void ISR_Ep2piderror(void) interrupt 0
{
}
void ISR_Ep4piderror(void) interrupt 0
{
}
void ISR_Ep6piderror(void) interrupt 0
{
}
void ISR_Ep8piderror(void) interrupt 0
{
}
void ISR_Ep2pflag(void) interrupt 0
{
}
void ISR_Ep4pflag(void) interrupt 0
{
}
void ISR_Ep6pflag(void) interrupt 0
{
}
void ISR_Ep8pflag(void) interrupt 0
{
}
void ISR_Ep2eflag(void) interrupt 0
{
}
void ISR_Ep4eflag(void) interrupt 0
{
}
void ISR_Ep6eflag(void) interrupt 0
{
}
void ISR_Ep8eflag(void) interrupt 0
{
}
void ISR_Ep2fflag(void) interrupt 0
{
}
void ISR_Ep4fflag(void) interrupt 0
{
}
void ISR_Ep6fflag(void) interrupt 0
{
}
void ISR_Ep8fflag(void) interrupt 0
{
}
void ISR_GpifComplete(void) interrupt 0
{
}
void ISR_GpifWaveform(void) interrupt 0
{
}

void rddata16(BYTE AD)
{
if(!(EP2468STAT & bmEP6FULL & bmEP8FULL))
  {
	 
      for(i=0;i<xfrcnt;i++)
	    {
		 //IOB=AD;
         SYNCDELAY; 
//		 RDCLKA=0;        //set_clk=0
        
	     SYNCDELAY;
		
		 EP6FIFOBUF[i]=IOC;
	     SYNCDELAY;
	
         //IOB=AD+1;
         SYNCDELAY;
         EP8FIFOBUF[i]=IOC;
         SYNCDELAY; 
	
//   		 RDCLKA=1;        //set_clk=1
         }

 	EP6BCH = xfrcnt>>8;	
	 SYNCDELAY;
	EP6BCL = (BYTE)xfrcnt;
	 SYNCDELAY;
 	EP8BCH = xfrcnt>>8;
	 SYNCDELAY;
	EP8BCL = (BYTE)xfrcnt;
  }
}


void rddata(BYTE AD)
{
if(!(EP2468STAT & bmEP6FULL))
  {
	 
     // IOB=AD;
      for(i=0;i<xfrcnt;i++)
	    {
		

//		 RDCLKA=0;        //set_clk=0
         

		 EP6FIFOBUF[i]=IOC;
//   		 RDCLKA=1;        //set_clk=1 
  }

 	EP6BCH = xfrcnt>>8;	
	 SYNCDELAY;
	EP6BCL = (BYTE)xfrcnt;
  }
}

/*
void in6(WORD sw)

{  if(!(EP2468STAT & bmEP6FULL))

      {
         IOA=sw;
         SYNCDELAY;
         
         SYNCDELAY;
         SYNCDELAY; 
         SYNCDELAY;
	    EP6FIFOBUF[0] = IOC;    
	   // EP6FIFOBUF[0] = CPUCS;
	    EP6BCH = 0;             
	    SYNCDELAY;
         SYNCDELAY;     
	    EP6BCL = 1;             
	                            
       }        

}

*/