USB编程

开发平台：
C/C++

vendor.c：源码内容
							//***********************************************************************
//									     								                  *
//                P H I L I P S   P R O P R I E T A R Y          		   *    
//                                                                      *
//          COPYRIGHT (c)   1999 BY PHILIPS SINGAPORE (APIC).    		   *
//                    --  ALL RIGHTS RESERVED  --                 		*	
//                                                                      *
// 	File Name	:       DMADebug.c                                    *
// 	Author		:       Albert Goh					 					      *
// 	Created		:      	3 March 2000                               	*
//                  	                                                   *
//***********************************************************************
//***********************************************************************
//                                                                      *
// GDMADebug.c is the file that contain the routine for the GDMA debug  *
// It will be able to configured as master for slave for the debugging	*
//                                                                      *
//***********************************************************************
//***********************************************************************
//                                                                      *
//  Module History														            *
//  **************														            *
//																		                  *
//  Date   	Version			Author				Changes					      *
//  ====	   =======			======				=======					      *
//  030300	  0.1 			Albert				Created    				      *
//                                                                      *
//                                                                      *
//***********************************************************************
//***********************************************************************
//*																		               *
//*	                     Include Files Definition						   *
//*																		               *
//***********************************************************************
#include "standard.h"
#include "Kernel.h"
#include "D14.h"
//***********************************************************************
//*																		               *
//*	                 External Variable Definition 					      *
//*																		               *
//***********************************************************************
extern USB_DEVICE USB_Device;
extern DMA_INT_FLAG DMA_Int_Flag;
extern USB_INT_FLAG USB_Int_Flag;
extern volatile D14_CNTRL_REG xdata D14_Cntrl_Reg;
extern void Start_mSEC_Timer(Data);
extern UC Data;
extern UI Temp,PIO_Count;
extern KERNEL Kernel_Flag;
extern ULI 	bytecount;
extern FILESIZE FileSize;
extern UI	count;
extern UC idata Endpt_FIFO[MAX_BUF];
extern UC Type;
//***********************************************************************
//*																		               *
//*	                     Variable Definition 							      *
//*																		               *
//***********************************************************************
UI Count_PIO;
//***********************************************************************
//*																		               *
//*	                     Prototype Definition 							   *
//*																		               *
//***********************************************************************
void DMA_Debug_Mode(void);
void DMA_Init(void);
void DMA_Mode(Data);
//***********************************************************************
//*																		               *
//*	                     Routine Definition								   *
//*																		               *
//***********************************************************************
//***********************************************************************
//*										    							               *
//*	Routine 	: DMA Debug Mode                                 		   *
//*	Input		: None             									            *
//*	Output	: None                               					      *
//*	Function	: Generic DMA mode routine                			      *
//*																		               *
//***********************************************************************
void DMA_Debug_Mode(void)
{
	if(Kernel_Flag.BITS.Transfer_Start)
	{
		if(FileSize.Size.Address[0] == 0 &&
			FileSize.Size.Address[1] == 0 &&
			FileSize.Size.Address[2] == 0)
		{
			Kernel_Flag.BITS.Out_Reset_Done = 0;
			Kernel_Flag.BITS.In_Reset_Done = 0;
		}
		
		if(FileSize.Size.DIR == 0x00 || FileSize.Size.DIR == 0x80)
			DMA_Mode(Write);
		else
			DMA_Mode(Read);
	}
}
//***********************************************************************
//*										    							               *
//*	Routine 	: DMA Mode                                       		   *
//*	Input		: DMA Controller setting         				            *
//*	Output	: None                               					      *
//*	Function	: to do GDMA data transfer                			      *
//*																		               *
//***********************************************************************
void DMA_Mode(Data)
{
	UI Datcount;
	if(Data)
	{
		//read
		do
		{
			//Check for Out Token ACK interrupt
			while(!USB_Int_Flag.BITS.EP2RX)
			{
				if(USB_Int_Flag.BITS.SUSP || Kernel_Flag.BITS.Bus_Reset || USB_Int_Flag.BITS.EP0SETUP)
					break;
			}
			EA_DISABLE;
			USB_Int_Flag.BITS.EP2RX = 0;
			EA_ENABLE;
			D14_Cntrl_Reg.D14_ENDPT_INDEX = 4;
			D14_Cntrl_Reg.D14_DMA_ENDPOINT = 2;
			//Read in FIFO data
			if (bytecount > PIO_Count)
			{
				Datcount = PIO_Count;
			}
			else
			{
				Datcount = bytecount;
			}
			if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
			{
				for(Count_PIO = 0 ; Count_PIO < Datcount ; Count_PIO++)
					Endpt_FIFO[Count_PIO] = D14_Cntrl_Reg.D14_DATA_PORT_LSB;
			}
			else
			{
				for(Count_PIO = 0 ; Count_PIO < Datcount; Count_PIO++)
					Temp = D14_Cntrl_Reg.D14_DATA_PORT_LSB;
			}
			bytecount -= Datcount;
		}while(bytecount);
	}
	else
	{
		//write
		do
		{
			//initialize endpoint index
			D14_Cntrl_Reg.D14_ENDPT_INDEX = 5;
			D14_Cntrl_Reg.D14_DMA_ENDPOINT = 2;
			//Write data to FIFO
			if (bytecount>PIO_Count)
			{
				D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB =( unsigned char ) PIO_Count;
				D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = ( unsigned char ) (PIO_Count>>8);
				Datcount = PIO_Count;
			}
			else
			{
				D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB =( unsigned char ) bytecount;
				D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = ( unsigned char ) (bytecount>>8);
				Datcount = bytecount;
			}
			if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
			{
				for(Count_PIO = 0 ; Count_PIO < Datcount ; Count_PIO++)
					D14_Cntrl_Reg.D14_DATA_PORT_LSB = Endpt_FIFO[Count_PIO];
			}
			else
			{
				for(Count_PIO = 0 ; Count_PIO < Datcount ; Count_PIO++)
					D14_Cntrl_Reg.D14_DATA_PORT_LSB = Count_PIO % 256;
			}
			//Check for In Token ACK
			while(!USB_Int_Flag.BITS.EP2TX)
			{    
				if(USB_Int_Flag.BITS.SUSP || Kernel_Flag.BITS.Bus_Reset || USB_Int_Flag.BITS.EP0SETUP)
					break;
			}    
			EA_DISABLE;
			USB_Int_Flag.BITS.EP2TX = 0;
			EA_ENABLE;
			bytecount -= Datcount; 
		}while(bytecount);
		//stop DMA controller
		DMA_Start = GDMA_Stop;
		//transfewr done,reset internal variables
		DMA_Int_Flag.BITS.DMA_DONE = 0;
		Count_PIO = 0;
	}
	Kernel_Flag.BITS.Transfer_Start = 0;  
}

						