fw.c

总线供电的fx2 enumeration源代码

      	 pHighSpeedConfigDscr = (WORD)&HighSpeedConfigDscr;
        pFullSpeedConfigDscr = (WORD)&FullSpeedConfigDscr;
        EZUSB_Discon(1);
     }

      // Poll User Device
      // NOTE: Idle mode stops the processor clock.  There are only two
      // ways out of idle mode, the WAKEUP pin, and detection of the USB
      // resume state on the USB bus.  The timers will stop and the
      // processor will not wake up on any other interrupts.
      if (Sleep)
          {
          if(TD_Suspend())
              { 
              Sleep = FALSE;            // Clear the "go to sleep" flag.  Do it here to prevent any race condition between wakeup and the next sleep.
              do
                  {
                    EZUSB_Susp();         // Place processor in idle mode.
                  }
                while(!Rwuen && EZUSB_EXTWAKEUP());
                // Must continue to go back into suspend if the host has disabled remote wakeup
                // *and* the wakeup was caused by the external wakeup pin.
                
             // 8051 activity will resume here due to USB bus or Wakeup# pin activity.
             EZUSB_Resume();   // If source is the Wakeup# pin, signal the host to Resume.      
             TD_Resume();
              }   
          }
      TD_Poll();
   }
}

// Device request parser
void SetupCommand(void)
{
   void   *dscr_ptr;
   if(SETUPDAT[0] & SETUP_VENDOR_REQUEST)
   {
      //The vendor request
      if(DR_VendorCmnd())
          EZUSB_STALL_EP0();            // Stall End Point 0
   }
   else //standard or class request

   {
   switch(SETUPDAT[1])
   {
      case SC_GET_DESCRIPTOR:                  // *** Get Descriptor
         if(DR_GetDescriptor())
            switch(SETUPDAT[3])         
            {
               case GD_DEVICE:            // Device
                  SUDPTRH = MSB(pDeviceDscr);
                  SUDPTRL = LSB(pDeviceDscr);
                  break;
               case GD_DEVICE_QUALIFIER:            // Device Qualifier
                  SUDPTRH = MSB(pDeviceQualDscr);
                  SUDPTRL = LSB(pDeviceQualDscr);
                  break;
               case GD_CONFIGURATION:         // Configuration
                  SUDPTRH = MSB(pConfigDscr);
                  SUDPTRL = LSB(pConfigDscr);
                  break;
               case GD_OTHER_SPEED_CONFIGURATION:  // Other Speed Configuration
                  SUDPTRH = MSB(pOtherConfigDscr);
                  SUDPTRL = LSB(pOtherConfigDscr);
                  break;
               case GD_STRING:            // String
                  if(dscr_ptr = (void *)EZUSB_GetStringDscr(SETUPDAT[2]))
                  {
                     SUDPTRH = MSB(dscr_ptr);
                     SUDPTRL = LSB(dscr_ptr);
                  }
                  else 
                     EZUSB_STALL_EP0();   // Stall End Point 0
                  break;
               default:            // Invalid request
                  EZUSB_STALL_EP0();      // Stall End Point 0
            }
         break;
      case SC_GET_INTERFACE:                  // *** Get Interface
         DR_GetInterface();
         break;
      case SC_SET_INTERFACE:                  // *** Set Interface
         DR_SetInterface();
         break;
      case SC_SET_CONFIGURATION:               // *** Set Configuration
         DR_SetConfiguration();
         if (Configuration == 1 && !hiSpeed)
            switchToHighPower = 1;
         break;
      case SC_GET_CONFIGURATION:               // *** Get Configuration
         DR_GetConfiguration();
         break;
      case SC_GET_STATUS:                  // *** Get Status
         if(DR_GetStatus())
            switch(SETUPDAT[0])
            {
               case GS_DEVICE:            // Device
                  EP0BUF[0] = ((BYTE)Rwuen << 1) | (BYTE)Selfpwr;
                  EP0BUF[1] = 0;
                  EP0BCH = 0;
                  EP0BCL = 2;
                  break;
               case GS_INTERFACE:         // Interface
                  EP0BUF[0] = 0;
                  EP0BUF[1] = 0;
                  EP0BCH = 0;
                  EP0BCL = 2;
                  break;
               case GS_ENDPOINT:         // End Point
                  EP0BUF[0] = *(BYTE xdata *) epcs(SETUPDAT[4]) & bmEPSTALL;
                  EP0BUF[1] = 0;
                  EP0BCH = 0;
                  EP0BCL = 2;
                  break;
               default:            // Invalid Command
                  EZUSB_STALL_EP0();      // Stall End Point 0
            }
         break;
      case SC_CLEAR_FEATURE:                  // *** Clear Feature
         if(DR_ClearFeature())
            switch(SETUPDAT[0])
            {
               case FT_DEVICE:            // Device
                  if(SETUPDAT[2] == 1)
                     Rwuen = FALSE;       // Disable Remote Wakeup
                  else
                     EZUSB_STALL_EP0();   // Stall End Point 0
                  break;
               case FT_ENDPOINT:         // End Point
                  if(SETUPDAT[2] == 0)
                  {
                     *(BYTE xdata *) epcs(SETUPDAT[4]) &= ~bmEPSTALL;
                     EZUSB_RESET_DATA_TOGGLE( SETUPDAT[4] );
                  }
                  else
                     EZUSB_STALL_EP0();   // Stall End Point 0
                  break;
            }
         break;
      case SC_SET_FEATURE:                  // *** Set Feature
         if(DR_SetFeature())
            switch(SETUPDAT[0])
            {
               case FT_DEVICE:            // Device
                  if(SETUPDAT[2] == 1)
                     Rwuen = TRUE;      // Enable Remote Wakeup
                  else if(SETUPDAT[2] == 2)
                     // Set Feature Test Mode.  The core handles this request.  However, it is
                     // necessary for the firmware to complete the handshake phase of the
                     // control transfer before the chip will enter test mode.  It is also
                     // necessary for FX2 to be physically disconnected (D+ and D-)
                     // from the host before it will enter test mode.
                     break;
                  else
                     EZUSB_STALL_EP0();   // Stall End Point 0
                  break;
               case FT_ENDPOINT:         // End Point
                  *(BYTE xdata *) epcs(SETUPDAT[4]) |= bmEPSTALL;
                  break;
            }
         break;
      default:                     // *** Invalid Command
         if(DR_VendorCmnd())
            EZUSB_STALL_EP0();            // Stall End Point 0
   }
}
   // Acknowledge handshake phase of device request
   EP0CS |= bmHSNAK;
}

// Wake-up interrupt handler
void resume_isr(void) interrupt WKUP_VECT
{
   EZUSB_CLEAR_RSMIRQ();
}

void EZUSB_Discon(BOOL renum)
{

   if(hiSpeed)
   {
      CT1 = 0;    // Enable chirp sequence (enable high speed)
   }
   else
   {
      CT1 = 2;    // Disable chirp sequence -- stay in full speed
   }

   if(renum)                                 // If renumerate (i.e. 8051 will handle SETUP commands)
      USBCS |= (bmDISCON | bmRENUM);        // disconnect from USB and set the renumerate bit
   else
      USBCS |= bmDISCON;                     // just disconnect from USB

   EZUSB_Delay(1500);      // Wait 1500 ms

   USBIRQ = 0xff;          // Clear any pending USB interrupt requests.  They're for our old life.
   EPIRQ = 0xff;
   EZUSB_IRQ_CLEAR();

   USBCS &=~bmDISCON;      // reconnect USB

   if (hiSpeed)
   {
      // set the CPU clock to 48MHz
      CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ;

      // set the slave FIFO interface to 48MHz
      IFCONFIG |= 0x40;
   }

}