www.pudn.com > USBdiskRW.rar > fw.c

//----------------------------------------------------------------------------- 
//	File:		fw.c 
//	Contents:	Firmware frameworks task dispatcher and device request parser 
//				source. 
// 
//	Copyright (c) 2002 Cypress Semiconductor, Inc. All rights reserved 
// 
// $Archive: /USB/ez811/firmware/Emb_Host/fw.c $ 
// $Date: 4/03/02 4:32p $ 
// $Revision: 1 $ 
//----------------------------------------------------------------------------- 
#include "ezusb.h" 
#include "ezregs.h" 
#include "def.h" 
#include "utils.h" 
 
//----------------------------------------------------------------------------- 
// Random Macros 
//----------------------------------------------------------------------------- 
//#define	min(a,b) (((a)<(b))?(a):(b)) 
//#define	max(a,b) (((a)>(b))?(a):(b)) 
 
//----------------------------------------------------------------------------- 
// Constants 
//----------------------------------------------------------------------------- 
 
//----------------------------------------------------------------------------- 
// Global Variables 
//----------------------------------------------------------------------------- 
volatile BOOL	GotSUD; 
BOOL		Rwuen; 
BOOL		Selfpwr; 
volatile BOOL	Sleep;						// Sleep mode enable flag 
 
DWORD	pDeviceDscr;	// Pointer to Device Descriptor; Descriptors may be moved 
DWORD	pConfigDscr;	 
DWORD	pStringDscr;	 
 
//----------------------------------------------------------------------------- 
// Prototypes 
//----------------------------------------------------------------------------- 
void SetupCommand(void); 
void TD_Init(void); 
void TD_Poll(void); 
BOOL TD_Suspend(void); 
BOOL TD_Resume(void); 
 
BOOL DR_GetDescriptor(void); 
BOOL DR_SetConfiguration(void); 
BOOL DR_GetConfiguration(void); 
BOOL DR_SetInterface(void); 
BOOL DR_GetInterface(void); 
BOOL DR_GetStatus(void); 
BOOL DR_ClearFeature(void); 
BOOL DR_SetFeature(void); 
BOOL DR_VendorCmnd(void); 
 
//----------------------------------------------------------------------------- 
// Code 
//----------------------------------------------------------------------------- 
 
// Task dispatcher 
void SL811Main(void) 
{ 
	printf("\nSL811HST test\n") ; 
	printf("Please insert a USB Device\n") ; 
	printf("for example : USB Flash Disk, USB MOUSE, USB keyboard......\n") ; 
	// Initialize Global States 
	Sleep = FALSE;					// Disable sleep mode 
	Rwuen = FALSE;					// Disable remote wakeup 
	Selfpwr = FALSE;				// Disable self powered 
	GotSUD = FALSE;					// Clear "Got setup data" flag 
 
	                  
	TD_Init();                       // Initialize user device 
	 
 
	//EZUSB_IRQ_ENABLE();				// Enable USB interrupt (INT2) 
	EZUSB_ENABLE_RSMIRQ();				// Wake-up interrupt 
	 
 
	// The 8051 is responsible for all USB events, even those that have happened 
	// before this point.  We cannot ignore pending USB interrupts. 
	// The chip will come out of reset with the flags all cleared. 
	//	USBIRQ = 0xff;				// Clear any pending USB interrupt requests 
	PORTCCFG |= 0xc0;				// Turn on r/w lines for external memory  
 
	USBBAV = USBBAV | 1 & ~bmBREAK;	// Disable breakpoints and autovectoring 
	USBIEN |= bmSUDAV | bmSUTOK | bmSUSP | bmURES;	// Enable selected interrupts 
	//rINTMSK &= ~BIT_GLOBAL;					// Enable interrupts 
	//EA = 1;	 
 
  	// Task Dispatcher 
  
	while(getkey()!=ESC_KEY)		// Main Loop 
	{ 
		if(GotSUD)				// Wait for SUDAV 
		{ 
			//SetupCommand();	 		// Implement setup command 
  			GotSUD = FALSE;		   	// Clear SUDAV flag 
  			 
		} 
 
		// 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(); 
		//UFI_Inquiry() ;	 
	} 
	 
}