fw.c

CY7C68033芯片 USB DEVICE 代码；标准c代码

#pragma NOIV
//-----------------------------------------------------------------------------
// File:     fw.c
// Contents: Firmware frameworks task dispatcher and device request parser
//           source.
// indent 3.  NO TABS!
//
// Copyright (c) 2005 Cypress Semiconductor
//
// $Workfile: fw.c $
// $Date: 8/08/05 10:49a $
// $Revision: 1 $
//-----------------------------------------------------------------------------
//
// Copyright 2005, Cypress Semiconductor Corporation.
//
// This software is owned by Cypress Semiconductor Corporation (Cypress)
// and is protected by and subject to worldwide patent protection (United
// States and foreign), United States copyright laws and international 
// treaty provisions. Cypress hereby grants to licensee a personal, 
// non-exclusive, non-transferable license to copy, use, modify, create 
// derivative works of, and compile the Cypress Source Code and derivative 
// works for the sole purpose of creating custom software in support of 
// licensee product to be used only in conjunction with a Cypress integrated 
// circuit as specified in the applicable agreement. Any reproduction, 
// modification, translation, compilation, or representation of this 
// software except as specified above is prohibited without the express 
// written permission of Cypress.
//
// Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND,EXPRESS OR IMPLIED, 
// WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
// Cypress reserves the right to make changes without further notice to the
// materials described herein. Cypress does not assume any liability arising
// out of the application or use of any product or circuit described herein.
// Cypress does not authorize its products for use as critical components in
// life-support systems where a malfunction or failure may reasonably be
// expected to result in significant injury to the user. The inclusion of
// Cypress' product in a life-support systems application implies that the
// manufacturer assumes all risk of such use and in doing so indemnifies
// Cypress against all charges.
//
// Use may be limited by and subject to the applicable Cypress software
// license agreement.
//
//--------------------------------------------------------------------------

#include "globals.h"

//-----------------------------------------------------------------------------
// Code
// Task dispatcher
//-----------------------------------------------------------------------------
void main(void)
{

   TD_Init();                     // HW/SW initialization

   EZUSB_IRQ_ENABLE();            // Enable USB interrupt (INT2)
   EZUSB_ENABLE_RSMIRQ();         // Wake-up interrupt
   INTSETUP |= (bmAV2EN);         // Enable INT 2 autovectoring

   USBIE = bmSUDAV | bmSUSP | bmURES | bmHSGRANT;   // Enable selected interrupts

   //////////////////////////////////////////////////////////////////////////////
   //
   // How we got here         Renum Bit Discon Bit  Desired Action
   // ---------------         --------- ----------  --------------------
   // LI Boot-Loader Good_FW     0          1       Set the renum bit and connect
   // LI Boot-Loader !Good_FW    0          0       renumerate
   // USB Reset                  1          0       do nothing
   // Debug Mode (no bootloader) 0          0       renumerate
   // I2C Boot-Loader Good_FW    1          0       do nothing
   // I2C Boot-Loader !Good_FW   0          0       renumerate
   //
   if(!(USBCS & (bmRENUM | bmDISCON)))
   {
      EA = 0;
      // disconnect from USB and set the renumerate bit
      USBCS |= (bmDISCON | bmRENUM);        
      EZUSB_Delay(2500);      // Wait 2500 ms  
      USBIRQ = 0xff;          // Clear any pending USB interrupt requests.  
      EPIRQ = 0xff;
      EZUSB_IRQ_CLEAR();
   }

   EA = 1;                  // Enable 8051 interrupts
   TR0 = 1;                 // Make sure that the timer ISR runs at once.  

   // unconditionally re-connect.  If we loaded from eeprom we are
   // disconnected and need to connect.  If we just renumerated this
   // is not necessary but doesn't hurt anything
   USBCS = (bmRENUM|bmNOSYNSOF);

   // complete the handshake phase of any pending SETUP transfer.
   // The only time this should happen is after a MSC Reset.  We want
   // to go through all of the EP init code before handshaking the status
   // phase of the MSC Reset.
   EP0CS |= bmHSNAK;
   Sleep = 0;                     // sleep is off

   // Task Dispatcher
   while(TRUE)                     // Main Loop
   {
      // Suspend code -- Turn off LEDs, chip enables and put CPU into suspend.
      // We don't support remote wakeup.  Only wake on SOFs.
      if (Sleep)
      {
         Sleep = FALSE;
         WAKEUPCS = bmWU2 | bmWU | bmDPEN;      
         EZUSB_Susp();         // Place processor in idle mode.
      }  // endif (sleep)
      TD_Poll();
   }  // End while-forever loop
}

//-----------------------------------------------------------------------------
// Standard requests are 
// Device request parser
//-----------------------------------------------------------------------------
void SetupCommand(void)
{
   WORD Tmp;
   BYTE setupdat0 = SETUPDAT[0];
   BYTE setupdat2 = SETUPDAT[2];
   BYTE setupdat4 = SETUPDAT[4];
   EP0BCH = 0;                                     // Default to MSB of the length is 0
   SUDPTRH = MSB(halfKBuffer);                     // Default to descriptor table

   if ((setupdat0 & SETUP_MASK) == SETUP_STANDARD_REQUEST)
      {
      switch(SETUPDAT[1])
         {
         case SC_GET_DESCRIPTOR:                       // *** Get Descriptor
            switch(SETUPDAT[3])         
               {
                  case GD_DEVICE:                      // Device
                     SUDPTRL = pLSB(DeviceDscrOffset); //sendDescriptor(LSB(pDeviceDscr), 0);
                     break;
                  case GD_DEVICE_QUALIFIER:            // Device Qualifier
                     // if high-speed is disabled, we are supposed to STALL this request
                     if (!CT1)
                     {
                        // high-speed is enabled, return the device qualifier
                        // sendDescriptor(LSB(pDeviceQualDscr), 0);
                        SUDPTRL = pLSB(DeviceQualDscrOffset);
                     }
                     else
                     {
                        // high-speed is disabled, STALL this request
                        EZUSB_STALL_EP0();
                     }
                     break;
                  case GD_CONFIGURATION:              // Configuration
                     ((CONFIGDSCR xdata *) pHighSpeedConfigDscr)->type = CONFIG_DSCR;
                     Tmp = wPacketSize;
                     goto gd_cases;

                  case GD_OTHER_SPEED_CONFIGURATION:  // Other Speed Configuration
                     ((CONFIGDSCR xdata *) pHighSpeedConfigDscr)->type = OTHERSPEED_DSCR;
                     if (EZUSB_HIGHSPEED()) Tmp = 64; else Tmp = 512;
                     gd_cases:
                     ((BYTE xdata *) pHighSpeedConfigDscr)[9+9+4] =       
                     ((BYTE xdata *) pHighSpeedConfigDscr)[9+9+7+4] = ((BYTE*)&Tmp)[1];      
                     ((BYTE xdata *) pHighSpeedConfigDscr)[9+9+5] =       
                     ((BYTE xdata *) pHighSpeedConfigDscr)[9+9+7+5] = ((BYTE*)&Tmp)[0];      
                     sendDescriptor(LSB(pHighSpeedConfigDscr), (BYTE)&HighSpeedConfigLen);
                     break;

                  case GD_STRING:            // String
                     SUDPTRH = MSB(halfKBuffer+cHALF_BUFF_OFFSET);
                     SUDPTRL = cINQUIRY_LENGTH + (setupdat2 * 48);
                     break;
#ifdef HID
                  case GD_REPORT: 	 // Get-Descriptor: Report
                     if (halfKBuffer[(WORD)&HIDIntrfcDscrOffset+3] == setupdat4)
                     {  
                        sendDescriptor(pLSB(HIDReportDscrOffset), (BYTE)&HIDReportDscrLen);
                        break;
                     }
				     else EZUSB_STALL_EP0();      // Stall End Point 0
                     break;
                  case GD_HID:					  // Get-Descriptor: HID
                     SUDPTRL = pLSB(HIDDscrOffset);
                     break;
#endif
                  default:                   // Invalid request
                     EZUSB_STALL_EP0();      // Stall End Point 0
               }  // switch
            break;
         case SC_GET_INTERFACE:              // *** Get Interface
            EP0BUF[0] = AlternateSetting;
            EP0BCL = 1;
            break;
         case SC_SET_INTERFACE:                  // *** Set Interface
            TOGCTL = 0x2;     // Reset data toggle for EP2
            TOGCTL = 0x22;
            TOGCTL = 0x14;    // Reset data toggle for EP4
            TOGCTL = 0x34;
            AlternateSetting = setupdat2;
            break;