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USB_ISR.c：源码内容
							//-----------------------------------------------------------------------------
// USB_ISR.c
//-----------------------------------------------------------------------------
// Copyright 2007 Vson Technology, Inc.
// http://www.usbmcu.com
//
// Program Description:
//
//
//
//
//
// MCU:            C8051F347
// Tool chain:     Keil C51 7.50 / Keil EVAL C51
//                 Silicon Laboratories IDE version 2.6
// Command Line:   
// Project Name:   TR1000
//
//
// Release 1.0
//    -All changes by Brin Cai
//    -24 JUL 2007
//
//
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include "Include_H.h"
typedef struct {            //  Structure definition of a block of data
    BYTE Piece[MAX_BLOCK_SIZE];
}   BLOCK;
typedef struct {            //  Structure definition of a flash memory page
    BYTE FlashPage[FLASH_PAGE_SIZE];
}   PAGE;
//xdata   BLOCK   TempStorage[BLOCKS_PR_PAGE];    // Temporary storage of between 
                                                // flash writes
code    BYTE    Pg0 _at_    0x1400;
code    BYTE    Pg1 _at_    0x1600;
code    BYTE    Pg2 _at_    0x1800;
code    BYTE    Pg3 _at_    0x1A00;
code    BYTE    Pg4 _at_    0x1C00;
code    BYTE    Pg5 _at_    0x1E00;
code    BYTE    Pg6 _at_    0x2000;
code    BYTE    Pg7 _at_    0x2200;
code    BYTE    Pg8 _at_    0x2400;
code    BYTE    Pg9 _at_    0x2600;
code    BYTE    Pg10    _at_    0x2800;
code    BYTE    Pg11    _at_    0x2A00;
code    BYTE    Pg12    _at_    0x2C00;
code    BYTE    Pg13    _at_    0x2E00;
code    BYTE    Pg14    _at_    0x3000;
code    BYTE    Pg15    _at_    0x3200;
code    BYTE    Pg16    _at_    0x3400;
code    BYTE    Pg17    _at_    0x3600;
code    BYTE    Pg18    _at_    0x3800;
code    BYTE    Pg19    _at_    0x3A00;
data bit bitInterruptFlag = 0;
//idata unsigned char gaucTxData2HostBuffer[64];
/*
idata   BYTE*   PageIndices[20] =   {&Pg0,  &Pg1,   &Pg2,   &Pg3,   &Pg4,   
                                     &Pg5,  &Pg6,   &Pg7,   &Pg8,   &Pg9,
                                     &Pg10, &Pg11,  &Pg12,  &Pg13,  &Pg14,  
									 &Pg15,  &Pg16,  &Pg17,  &Pg18,  &Pg19};
*/
data    UINT    BytesToWrite;   //  Total number of bytes to write to the host
//data    UINT    BytesToRead;    //  Total number of bytes to read from host
data    BYTE    Buffer[3];      //  Buffer for Setup messages
data    BYTE    NumBlocks;      //  Number of Blocks for this transfer
//data    BYTE    M_State;        //  Current Machine State
data    BYTE    BlockIndex;     //  Index of Current Block in Page
data    BYTE    PageIndex;      //  Index of Current Page in File
data    BYTE    BlocksRead;     //  Total Number of Blocks Read
data    BYTE    BlocksWrote;    //  Total Number of Blocks Written
data    BYTE*   ReadIndex;
// code const   BYTE    Serial1[0x0A] = {0x0A,0x03,'A',0,'B',0,'C',0,'D',0};
// Serial Number Defintion
code    BYTE    LengthFile[3]   _at_    0x1200;
//  {Length(Low Byte), Length(High Byte), Number of Blocks}
        
//-----------------------------------------------------------------------------
// Interrupt Service Routines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// USB_ISR
//-----------------------------------------------------------------------------
//
//
// This is the top level USB ISR. All endpoint interrupt/request
// handlers are called from this function.
//
// Handler routines for any configured interrupts should be
// added in the appropriate endpoint handler call slots.
//
//-----------------------------------------------------------------------------
void USB_ISR () interrupt 8
{
   BYTE bCommonInt, bInInt, bOutInt;
   // Read interrupt registers
   UREAD_BYTE(CMINT, bCommonInt);
   UREAD_BYTE(IN1INT, bInInt);
   UREAD_BYTE(OUT1INT, bOutInt);
   
   // Check for reset interrupt
   if (bCommonInt & rbRSTINT)
   {
      // Call reset handler
      M_State = USB_RESET_STATUS;
	  //USBReset();
      //M_State = WAIT_OPEN_DEVICE_STATUS;
      
   }
   // Check for Endpoint0 interrupt
   if (bInInt & rbEP0)
   {
      // Call Endpoint0 handler
	  M_State = EP0_HANDLER_STATUS;
      //Endpoint0();
   }
   // Endpoint1 IN
   if (bInInt & rbIN1)
   {
	 bitInterruptFlag = 1;
	 //sbitLED = 1;
	 /*
	 switch (M_State)
     {
      case
         TX_CONFIG_RESPONSE_TO_HOST_STATUS:                  // Stay in Wait State
         M_State = TX_KEY_DATA_TO_HOST_STATUS;
		 break;
      case
         TX_KEY_DATA_TO_HOST_STATUS:                  // Stay in Idle State
         M_State = TX_TOUCHPAD_DATA_TO_HOST_STATUS;
		 break;
      case
         TX_TOUCHPAD_DATA_TO_HOST_STATUS:   // Response Host After receive the Config Data
         M_State = TX_CONFIG_RESPONSE_TO_HOST_STATUS;//ST_TX_KEY_DATA_TO_HOST;
         break;
     
      default:
         M_State = DEVICE_IDLE_STATUS;           // Unknown State, stay in Error State
         break;
      }//switch
	  */
   }//if
   // Endpoint2 OUT
   if (bOutInt & rbOUT2)
   {
      bitInterruptFlag = 1;
	  M_State = RX_CONFIG_DATA_FROM_HOST_STATUS;
   }
   //State_Machine();
}
//-----------------------------------------------------------------------------
// Support Subroutines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// USBReset
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// - Initialize the global Device Status structure (all zeros)
// - Resets all endpoints
//-----------------------------------------------------------------------------
void USBReset ()
{
   BYTE i, bPower = 0;
   BYTE * pDevStatus;
  // Reset device status structure to all zeros (undefined)
   pDevStatus = (BYTE *)&gDeviceStatus;
   for (i=0;i<sizeof(DEVICE_STATUS);i++)
   {
      *pDevStatus++ = 0x00;
   }
   // Set device state to default
   gDeviceStatus.bDevState = DEV_DEFAULT;
   // REMOTE_WAKEUP_SUPPORT and SELF_POWERED_SUPPORT
   // defined in file "usb_desc.h"
   gDeviceStatus.bRemoteWakeupSupport = REMOTE_WAKEUP_SUPPORT;
   gDeviceStatus.bSelfPoweredStatus = SELF_POWERED_SUPPORT;
   // Reset all endpoints
   // Reset Endpoint0
   gEp0Status.bEpState = EP_IDLE;         // Reset Endpoint0 state
   gEp0Status.bEp = 0;                    // Set endpoint number
   gEp0Status.uMaxP = EP0_MAXP;           // Set maximum packet size
   // Reset Endpoint1 IN
   gEp1InStatus.bEpState = EP_HALTED;     // Reset state
   gEp1InStatus.uNumBytes = 0;            // Reset byte counter
   // Reset Endpoint2 OUT
   gEp2OutStatus.bEpState = EP_HALTED;    // Reset state
   gEp2OutStatus.uNumBytes = 0;           // Reset byte counter
   // Get Suspend enable/disable status. If enabled, prepare temporary
   // variable bPower.
   if (SUSPEND_ENABLE)
   {
      bPower = 0x01;                      // Set bit0 (Suspend Enable)
   }
   // Get ISO Update enable/disable status. If enabled, prepare temporary
   // variable bPower.
   if (ISO_UPDATE_ENABLE)
   {
      bPower |= 0x80;                     // Set bit7 (ISO Update Enable)
   }
   UWRITE_BYTE(POWER, bPower);
}
//-----------------------------------------------------------------------------
// Endpoint0
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
//-----------------------------------------------------------------------------
void Endpoint0 ()
{
   BYTE bTemp = 0;
   BYTE bCsr1, uTxBytes;
   UWRITE_BYTE(INDEX, 0);                 // Target ep0
   UREAD_BYTE(E0CSR, bCsr1);
   // Handle Setup End
   if (bCsr1 & rbSUEND)                   // Check for setup end
   {                                      // Indicate setup end serviced
      UWRITE_BYTE(E0CSR, rbSSUEND);
      gEp0Status.bEpState = EP_IDLE;      // ep0 state to idle
      M_State = DEVICE_IDLE_STATUS;              // ported from usb_file.c
   }
   // Handle sent stall
   if (bCsr1 & rbSTSTL)                   // If last state requested a stall
   {                                      // Clear Sent Stall bit (STSTL)
      UWRITE_BYTE(E0CSR, 0);
      gEp0Status.bEpState = EP_IDLE;      // ep0 state to idle
      M_State = DEVICE_IDLE_STATUS;              // ported from usb_file.c
   }
   // Handle incoming packet
   if (bCsr1 & rbOPRDY)
   {
      // Read the 8-byte command from Endpoint0 FIFO
      FIFORead(0, 8, (BYTE*)&gEp0Command);
      // Byte-swap the wIndex field
      bTemp = gEp0Command.wIndex.c[1];
      gEp0Command.wIndex.c[1] = gEp0Command.wIndex.c[0];
      gEp0Command.wIndex.c[0] = bTemp;
      // Byte-swap the wValue field
      bTemp = gEp0Command.wValue.c[1];
      gEp0Command.wValue.c[1] = gEp0Command.wValue.c[0];
      gEp0Command.wValue.c[0] = bTemp;
      // Byte-swap the wLength field
      bTemp = gEp0Command.wLength.c[1];
      gEp0Command.wLength.c[1] = gEp0Command.wLength.c[0];
      gEp0Command.wLength.c[0] = bTemp;
      // Decode received command
      switch (gEp0Command.bmRequestType & CMD_MASK_COMMON)
      {
         case  CMD_STD_DEV_OUT:           // Standard device requests
            // Decode standard OUT request
            switch (gEp0Command.bRequest)
            {
               case SET_ADDRESS:
                  SetAddressRequest();
                  break;
               case SET_FEATURE:
                  SetFeatureRequest();
                  break;
               case CLEAR_FEATURE:
                  ClearFeatureRequest();
                  break;
               case SET_CONFIGURATION:
                  SetConfigurationRequest();
                  break;
               case SET_INTERFACE:
                  SetInterfaceRequest();
                  break;
               // All other OUT requests not supported
               case SET_DESCRIPTOR:
               default:
                  gEp0Status.bEpState = EP_ERROR;
                  break;
            }
            break;
         // Decode standard IN request
         case CMD_STD_DEV_IN:
            switch (gEp0Command.bRequest)
            {
               case GET_STATUS:
                  GetStatusRequest();
                  break;
               case GET_DESCRIPTOR:
                  GetDescriptorRequest();
                  break;
               case GET_CONFIGURATION:
                  GetConfigurationRequest();
                  break;
               case GET_INTERFACE:
                  GetInterfaceRequest();
                  break;
               // All other IN requests not supported
               case SYNCH_FRAME:
			      break;//add at Aug.3, 2007
               default:
                  gEp0Status.bEpState = EP_ERROR;
                  break;
            }
            break;
         // All other requests not supported
         default:
            gEp0Status.bEpState = EP_ERROR;
      }
      // Write E0CSR according to the result of the serviced out packet
      bTemp = rbSOPRDY;
      if (gEp0Status.bEpState == EP_ERROR)
      {
         bTemp |= rbSDSTL;                // Error condition handled
                                          // with STALL
         gEp0Status.bEpState = EP_IDLE;   // Reset state to idle
      }
      UWRITE_BYTE(E0CSR, bTemp);
   }
   bTemp = 0;                             // Reset temporary variable
   // If state is transmit, call transmit routine
   if (gEp0Status.bEpState == EP_TX)
   {
      // Check the number of bytes ready for transmit
      // If less than the maximum packet size, packet will
      // not be of the maximum size
      if (gEp0Status.uNumBytes <= EP0_MAXP)
      {
         uTxBytes = gEp0Status.uNumBytes;
         gEp0Status.uNumBytes = 0;        // update byte counter
         bTemp |= rbDATAEND;              // This will be the last
                                          // packet for this transfer
         gEp0Status.bEpState = EP_IDLE;   // Reset endpoint state
      }
      // Otherwise, transmit maximum-length packet
      else
      {
         uTxBytes = EP0_MAXP;
         gEp0Status.uNumBytes -= EP0_MAXP;// update byte counter
      }
      // Load FIFO
      FIFOWrite(0, uTxBytes, (BYTE*)gEp0Status.pData);
      // Update data pointer
      gEp0Status.pData = (BYTE*)gEp0Status.pData + uTxBytes;
      // Update Endpoint0 Control/Status register
      bTemp |= rbINPRDY;                  // Always transmit a packet
                                          // when this routine is called
                                          // (may be zero-length)
      UWRITE_BYTE(E0CSR, bTemp);          // Write to Endpoint0 Control/Status
   }
}
//-----------------------------------------------------------------------------
// BulkOrInterruptOut
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   :
// 1) PEP_STATUS pEpOutStatus
//
//-----------------------------------------------------------------------------
void BulkOrInterruptOut(PEP_STATUS pEpOutStatus)
{
   UINT uBytes;
   BYTE bTemp = 0;
   BYTE bCsrL, bCsrH;
   UWRITE_BYTE(INDEX, pEpOutStatus->bEp); // Index to current endpoint
   UREAD_BYTE(EOUTCSRL, bCsrL);
   UREAD_BYTE(EOUTCSRH, bCsrH);
   // Make sure this endpoint is not halted
   if (pEpOutStatus->bEpState != EP_HALTED)
   {
      // Handle STALL condition sent
      if (bCsrL & rbOutSTSTL)
      {
         // Clear Send Stall, Sent Stall, and data toggle
         UWRITE_BYTE(EOUTCSRL, rbOutCLRDT);
      }
      // Read received packet
      if(bCsrL & rbOutOPRDY)
      {
         // Get packet length
         UREAD_BYTE(EOUTCNTL, bTemp);     // Low byte
         uBytes = (UINT)bTemp & 0x00FF;
         UREAD_BYTE(EOUTCNTH, bTemp);     // High byte
         uBytes |= (UINT)bTemp << 8;
         if (M_State == DEVICE_IDLE_STATUS) 
         {
            FIFORead(0x02, uBytes, &Buffer);
         }			 
         else
         {
            FIFORead(0x02, uBytes, (BYTE*)(&gaucTempStorage[BlockIndex]));
         }
         // Clear out-packet-ready
         UWRITE_BYTE(INDEX, pEpOutStatus->bEp);
         UWRITE_BYTE(EOUTCSRL, 0);
         // Read updated status register
         //UWRITE_BYTE(INDEX, pEpOutStatus->bEp); // Index to current endpoint
         //UREAD_BYTE(EOUTCSRL, bCsrL);
      }
   }
}
//-----------------------------------------------------------------------------
// BulkOrInterruptIn
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   :
// 1) PEP_STATUS pEpOutStatus
// 2) BYTE * DataToWrite
// 3) UINT NumBytes
//
// - Places DataToWrite on the IN FIFO
// - Sets Packet Ready Bit
//-----------------------------------------------------------------------------
void BulkOrInterruptIn (PEP_STATUS pEpInStatus, BYTE * DataToWrite,
                        UINT NumBytes)
{
   BYTE bCsrL, bCsrH;
   UWRITE_BYTE(INDEX, pEpInStatus->bEp);  // Index to current endpoint
   UREAD_BYTE(EINCSRL, bCsrL);
   UREAD_BYTE(EINCSRH, bCsrH);
   // Make sure this endpoint is not halted
   if (pEpInStatus->bEpState != EP_HALTED)
   {
      // Handle STALL condition sent
      if (bCsrL & rbInSTSTL)
      {
         UWRITE_BYTE(EINCSRL, rbInCLRDT); // Clear Send Stall and Sent Stall,
                                          // and clear data toggle
      }
      // If a FIFO slot is open, write a new packet to the IN FIFO
      if (!(bCsrL & rbInINPRDY))
      {
         pEpInStatus->uNumBytes = NumBytes;
         pEpInStatus->pData = (BYTE*)DataToWrite;
         // Write <uNumBytes> bytes to the <bEp> FIFO
         FIFOWrite(pEpInStatus->bEp, pEpInStatus->uNumBytes,
            (BYTE*)pEpInStatus->pData);
         BytesToWrite -= NumBytes;
         ReadIndex += NumBytes;
         BlocksWrote++;
         // Set Packet Ready bit (INPRDY)
         UWRITE_BYTE(EINCSRL, rbInINPRDY);
         // Check updated endopint status
         //UREAD_BYTE(EINCSRL, bCsrL);
      }
   }
}
//-----------------------------------------------------------------------------
// End Of File
//-----------------------------------------------------------------------------

						