led.c

s3c44b0 中断实验

/*********************************************************************************************
* File：	led.c
* Author:	tops
* Desc：	control board's LEDs
* History:	
*********************************************************************************************/
#include "44b.h"
#include "44blib.h"

/*------------------------------------------------------------------------------------------*/
/*                                     global variables                                     */
/*------------------------------------------------------------------------------------------*/
int f_nLedState;                                                // LED status   
            
/*------------------------------------------------------------------------------------------*/
/*                                     function declare                                     */
/*------------------------------------------------------------------------------------------*/
void led_test();                                                // LED test	
void leds_on();                                                 // all leds on  
void leds_off();                                                // all leds off
void led1_on();                                                 // led 1 on 
void led1_off();                                                // led 1 off 	
void led2_on();                                                 // led 2 on 
void led2_off();                                                // led 2 off 
void led3_on();                                                 // led 3 on 
void led3_off();                                                // led 3 off 	
void led4_on();                                                 // led 4 on 
void led4_off();                                                // led 4 off 
void led_display(int nLedStatus);                               // led control 

/*********************************************************************************************
* name:		led_test
* func:		leds test funciton
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led_test()
{
	
	leds_off();
	
	delay(3000);

	// led1->led4 以跑马灯方式点亮
	led1_on();
	delay(3000);
	led1_off();
	led2_on();
	delay(3000);
	led2_off();
	led3_on();
	delay(3000);
	led3_off();
	led4_on();
	delay(3000);
	led4_off();
	
	delay(3000);
	
	
}

/*********************************************************************************************
* name:		leds_on,led_off
* func:		all leds light or close 
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void leds_on()
{
	led_display(0xF);
}

void leds_off()
{
	led_display(0x0);
}

/*********************************************************************************************
* name:		led1_on,led1_off
* func:		led 1 light or close 
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led1_on()
{
	f_nLedState = f_nLedState | 0x1;
	led_display(f_nLedState);
}

void led1_off()
{
	f_nLedState = f_nLedState&0xfe;
	led_display(f_nLedState);
}

/*********************************************************************************************
* name:		led2_on,led2_off
* func:		led 2 light or close  
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led2_on()
{
	f_nLedState = f_nLedState | 0x2;
	led_display(f_nLedState);
}

void led2_off()
{
	f_nLedState = f_nLedState&0xfd;
	led_display(f_nLedState);
}

/*********************************************************************************************
* name:		led3_on,led3_off
* func:		led 3 light or close  
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led3_on()
{
	f_nLedState = f_nLedState | 0x4;
	led_display(f_nLedState);
}

void led3_off()
{
	f_nLedState = f_nLedState&0xFB;
	led_display(f_nLedState);
}

/*********************************************************************************************
* name:		led4_on,led4_off
* func:		led 4 light or close  
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led4_on()
{
	f_nLedState = f_nLedState | 0x8;
	led_display(f_nLedState);
}

void led4_off()
{
	f_nLedState = f_nLedState&0xf7;
	led_display(f_nLedState);
}

/*********************************************************************************************
* name:		led_display
* func:		light or close the Led 1,2,3,4 
* para:		nLedStatus	-- input, light LED 1,2,3,4 according to the nLedStatus
*								  nLedStatus   = 1 : LED 1(D6) on
*								  nLedStatus   = 2 : LED 2(D7) on
                                  nLedStatus   = 4 : LED 3(D8) on
                                  nLedStatus   = 8 : LED 4(D9) on
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void led_display(int nLedStatus)
{
	f_nLedState = nLedStatus;
	
	// change the led's current status
	if((nLedStatus&0x01) == 0x01)
		rPDATF &= 0xFFF7;                                 // GPF3:LED1 (D6) on
	else
		rPDATF |= (1<<3);                                 // off

	if((nLedStatus&0x02) == 0x02)
		rPDATF &= 0xFFEF;                                 // GPF4:LED2 (D7) on
	else
		rPDATF |= (1<<4);                                 // off

	if((nLedStatus&0x04) == 0x04)
		rPDATB &= 0xFBFF;                                   // GPB10:LED3 (D8) on
	else
		rPDATB |= (1<<10);                                 // off

	if((nLedStatus&0x08) == 0x08)
		rPDATB &= 0xFF7F;                                   // GPB7:LED4 (D9) on
	else
		rPDATB |= (1<<7);                                 // off
}