led_main.c

来自「ADC图形图像例子」· C语言 代码 · 共 64 行

/************************************************************************
 * File: led_main.c
 * 
 * Copyright: Peak Microtech Corporation
 *
 ***********************************************************************/
 
#include "register.h"
#include "io.h"

void delay(int n)
{
    int i;
    for( i=0; i<n; i++);
}

void led_init()
{
    long val;    
	
    /* Set the pin45 to be PIO27 */
    val = readl( REG_PMCR1 );	
	writel( REG_PMCR1 , val | 0x400 );
    
    /* Set the PIO27 to be Output (OC) mode */	
	val = readl( REG_PIOMOD );	
	writel( REG_PIOMOD , 0x00);
}


void led_on(void)
{
    int val;
    
    /* Turn on LED */    
	val = readl( REG_PIOLDAT );	
	writel( REG_PIOLDAT , 0x08000000);
}


void led_off(void)
{
    int val;
    
    /* Turn off LED */     
	val = readl( REG_PIOLDAT );	
	writel( REG_PIOLDAT , 0);
}

int main(void)
{
	led_init();
	
    while(1)
    {
        led_on();
        delay(1000000);
        led_off();
        delay(1000000);
    }

    return 0;
}