f320_usb_standard_requests.c

USB_Audio c8051Fxxx

//-----------------------------------------------------------------------------
// F320_USB_Standard_Requests.c
//-----------------------------------------------------------------------------
// Copyright 2005 Silicon Laboratories, Inc.
// http://www.silabs.com
//
// Program Description:
//
// This is the module that handles USB standard requests.  These requests are
// defined in chapter nine of the USB specification.
//
// FID:            32X000072
// Target:         C8051F320
// Tool chain:     KEIL C51 7.0.0.1 / KEIL A51 7.0.0.1
//                 Silicon Laboratories IDE version 2.3
// Command Line:   See Readme.txt
// Project Name:   F320_TONE_GENERATOR
//
// Release 1.0
//    -Initial Revision (PD)
//    -05 JUL 2006
//
//

//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------

#include "c8051f320.h"                 // SFR declarations
#include "F320_Tone_Generator_Main.h"  // Main project header
#include "F320_USB_Register.h"         // USB core register header
#include "F320_USB_Common.h"           // USB protocol header
#include "F320_USB_Descriptor.h"       // USB descriptor definitions

//-----------------------------------------------------------------------------
// Variable Declaration
//-----------------------------------------------------------------------------

idata BYTE Selected_Interface1;

//-----------------------------------------------------------------------------
// Get_Status
//
// Return Value : None
// Parameters   : None
//
// Returns status information for a given device, interface, or endpoint by
// sending a two byte status packet to the host.
//
//-----------------------------------------------------------------------------
void Get_Status (void) using USB_REGISTER_BANK
{
   // If non-zero return length or data length not equal to 2 then send a stall
   // indicating invalid request
   if ((Setup.wValue.i != 0) || (Setup.wLength.i != 2))
   {
      Force_Stall ();
   }

   switch (Setup.bmRequestType)        // Determine intended recipient
   {
      case OUT_DEVICE:                 // If recipient was device
         // Stall if invalid request otherwise send 0x0000, indicating bus
         // power and no remote wake-up
         if (Setup.wIndex.i != 0) Force_Stall();
         else DataPtr = (BYTE*)&ZERO_PACKET;
         break;

      case OUT_INTERFACE:              // See if recipient was interface
         // Send stall if invalid command otherwise return 0x0000
         if ((USB_State != DEV_CONFIGURED) || (Setup.wIndex.i != 0))
         {
            Force_Stall();
         }
         else DataPtr = (BYTE*)&ZERO_PACKET;
         break;

      case OUT_ENDPOINT:               // See if recipient was an endpoint
         // Make sure device is configured and index msb = 0x00 otherwise
         // return stall to host
         if ((USB_State != DEV_CONFIGURED) || (Setup.wIndex.c[MSB]))
         {
            Force_Stall();
         }
         else
         {
            switch (Setup.wIndex.c[LSB])
            {
               case IN_EP1:
                  if (Ep_Status[1] == EP_HALT) DataPtr = (BYTE*)&ONES_PACKET;
                  else DataPtr = (BYTE*)&ZERO_PACKET;
                  DataSize = 2;
                  break;

               case OUT_EP2:
                  if (Ep_Status[2] == EP_HALT) DataPtr = (BYTE*)&ONES_PACKET;
                  else DataPtr = (BYTE*)&ZERO_PACKET;
                  DataSize = 2;
                  break;

               case IN_EP3:
                  if (Ep_Status[3] == EP_HALT) DataPtr = (BYTE*)&ONES_PACKET;
                  else DataPtr = (BYTE*)&ZERO_PACKET;
                  DataSize = 2;
                  break;

               default: Force_Stall (); break;

            }
         }
         break;

      default:
         Force_Stall ();
         break;
   }

   if (Ep_Status[0] != EP_STALL)
   {
      // Set serviced setup packet bit, put endpoint in transmit mode, reset
      // data sent counter to 0 set data size to 2
      POLL_WRITE_BYTE (E0CSR, rbSOPRDY);
      Ep_Status[0] = EP_TX;
      DataSent = 0;
      DataSize = 2;
   }
}

//-----------------------------------------------------------------------------
// Clear_Feature
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// This routine can clear Halt Endpoint features for data endpoints.
//
//-----------------------------------------------------------------------------
void Clear_Feature (void) using USB_REGISTER_BANK
{
   // Make sure device is configured, endpoint is recipient, and halt endpoint
   // feature is selected
   if ((USB_State != DEV_CONFIGURED) || (Setup.bmRequestType != IN_ENDPOINT) ||
   (Setup.wValue.i != ENDPOINT_HALT) || (Setup.wLength.i != 0))
   {
      Force_Stall ();                  // Otherwise send stall to host
   }
   else
   {
      switch (Setup.wIndex.c[LSB])
      {
         case IN_EP1:
            POLL_WRITE_BYTE (INDEX, 1);
            // Clear feature endpoint 1 halt
            POLL_WRITE_BYTE (EINCSR1, rbInCLRDT);
            Ep_Status[1] = EP_IDLE;    // Set endpoint 1 status back to idle
            break;

         case OUT_EP2:
            POLL_WRITE_BYTE (INDEX, 2);
            // Clear feature endpoint 2 halt
            POLL_WRITE_BYTE (EOUTCSR1, rbOutCLRDT);
            Ep_Status[2] = EP_IDLE;    // Set endpoint 2 status back to idle
            break;

         case IN_EP3:
            POLL_WRITE_BYTE (INDEX, 3);
            // Clear feature endpoint 3 halt
            POLL_WRITE_BYTE (EINCSR1, rbInCLRDT);
            Ep_Status[3] = EP_IDLE;    // Set endpoint 3 status back to idle
            break;

         default: Force_Stall (); break;

      }
   }
   POLL_WRITE_BYTE (INDEX, 0);         // Reset Index to 0

   // Indicate setup packet has been serviced
   if (Ep_Status[0] != EP_STALL) POLL_WRITE_BYTE (E0CSR, rbSOPRDY);
}

//-----------------------------------------------------------------------------
// Set_Feature
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// This routine will set the EP Halt feature for data endpoints
//
//-----------------------------------------------------------------------------
void Set_Feature (void) using USB_REGISTER_BANK
{
   // Make sure device is configured, endpoint is recipient, and halt endpoint
   // feature is selected
   if ((USB_State != DEV_CONFIGURED) || (Setup.bmRequestType != IN_ENDPOINT) ||
   (Setup.wValue.i != ENDPOINT_HALT) || (Setup.wLength.i != 0))
   {
      Force_Stall ();                  // Otherwise send stall to host
   }
   else
   {
      switch (Setup.wIndex.c[LSB])
      {
         case IN_EP1:
            POLL_WRITE_BYTE (INDEX, 1);
            // Set feature endpoint 1 halt
            POLL_WRITE_BYTE (EINCSR1, rbInSDSTL);
            Ep_Status[1] = EP_HALT;    // Set endpoint 1 status to halt
            break;

         case OUT_EP2:
            POLL_WRITE_BYTE (INDEX, 2);
            // Set feature endpoint 2 halt
            POLL_WRITE_BYTE (EOUTCSR1, rbOutSDSTL);
            Ep_Status[2] = EP_HALT;    // Set endpoint 2 status to halt
            break;

         case IN_EP3:
            POLL_WRITE_BYTE (INDEX, 3);
            // Set feature endpoint 3 halt
            POLL_WRITE_BYTE (EINCSR1, rbInSDSTL);
            Ep_Status[3] = EP_HALT;    // Set endpoint 3 status to halt
            break;

         default: Force_Stall (); break;

      }
   }
   POLL_WRITE_BYTE (INDEX, 0);         // Reset Index to 0

   // Indicate setup packet has been serviced
   if (Ep_Status[0] != EP_STALL) POLL_WRITE_BYTE (E0CSR, rbSOPRDY);
}

//-----------------------------------------------------------------------------
// Set_Address
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// Set new function address
//
//-----------------------------------------------------------------------------
void Set_Address (void) using USB_REGISTER_BANK
{
   // Request must be directed to device with index and length set to zero