main.c.bak

用Visual C++实现键盘的驱动程序

/* $Id: //depot/software/SDK2/Triscend/a7hal/examples/hello/main.c#1 $ */
/*
 **********************************************************
 *  main.c
 *  Copyright(C) 2001-2002 Triscend Corporation. All Rights Reserved.
 *  This file is licensed under the terms of Triscend SDK License Agreement.
 **********************************************************
 */

#include <a7hal.h>
#include <stdio.h>
#include <stdlib.h>

#include "main.h"
#include "keyboard.h"

#define keyctrl 	*( ( unsigned char * ) keyCtrl )
#define keystat  	*( ( unsigned char * ) keyState )



static unsigned char keyvaluetable[] = 
{'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
//----------for keypad----------

volatile char keypressed,keyreleased,keyvalid,key,keyout;

/*
 *  Timer0 Interrupt Handler
 */
void Delay(int period);
void timer0_ISR( unsigned long whichTimer )
{
	int i,j = 0;
	int halt;
	unsigned char pre = keystat;
    a7hal_timer_clearInt( A7HAL_ICU_TIMER0 );
	a7hal_icu_intDisable( A7HAL_ICU_TIMER0 );
    a7hal_icu_intDisable( A7HAL_ICU_CSL0 );
	keyctrl = 1;
	for(i = 0; (i < 6) && (pre != keystat); i++, keyctrl <<= 1);
	if (i < 6)
	{
		pre = ~pre & 0x0f;	
		if (keystat != 0xf)
		{	
			while (pre > 1)
			{
				pre >>= 1;
				j++;
			}
			printf("%c ", keyvaluetable[i * 4 + j] );
			Delay(1000);
			while (keystat != 0xf);
		}
	}
	keyctrl = 0xff;
	a7hal_icu_intEnable( A7HAL_ICU_CSL0 );
}

/*
 *  IRQ0 Interrupt Handler  --  keypad IRQ Capture
 */
void irq0_ISR( unsigned long param )
{
	//printf("key irq generate!\n");
    a7hal_icu_intDisable( A7HAL_ICU_CSL0 );
    a7hal_icu_intEnable( A7HAL_ICU_TIMER0 );
	a7hal_timer_start( 5000, 0, A7HAL_DIV_256 | A7HAL_PERIODIC );
}


int main(  )
{	
	//char ch;
    char *src;
    
    a7hal_uart_init ();
    printf( "Uart Init Finished .\n" );

    
    /* Connect an ISR for the FIQ */
    a7hal_icu_intConnect( timer0_ISR, A7HAL_INT_LVL_TIMER0, 0 );
    /* Enable the timer interrupt and the FIQ */
    a7hal_icu_intEnable( A7HAL_INT_LVL_TIMER0 );
    /* Start the timer */
    //a7hal_timer_start( 0x8000, 0, A7HAL_DIV_256 | A7HAL_PERIODIC );
    //a7hal_timer_stop( 0 );
    printf( "Timer Init Finished .\n" );    
  
    /* Enable the irq0 interrupt  */
    a7hal_icu_intConnect( irq0_ISR, A7HAL_ICU_CSL0, 0 );
    a7hal_icu_intEnable( A7HAL_ICU_CSL0 );
    printf( "Irq0 Init Finished .\n" ); 

    //src = ( char * ) malloc( 128 );    

    //----------for keypad----------
    keyctrl = 0xff;
    keypressed=0;
    keyvalid= 0;
    
	printf( "Press any key to continue ...\n" );

    for ( ;; )
    {    	
	    //gets( src );
		if(keyvalid==1)
		{
			keyvalid=0;
			//ch = keymap(keyout);
			//get key value
			//printf("%c",ch);
			//keyctrl = 0xff;
			//a7hal_icu_intEnable( A7HAL_ICU_CSL0 );

		}
    }
}
void Delay(int period)
{
	int i,j;
	long value;
	for(i=0;i<period;i++)
	{
		for(j=0;j<period;j++)
		{
			value = i*j;
		}
	}
}