#include <reg52.h>sbit led1 = P1 ^ 2;void delay(unsigned int xx)//延时{int i = 0;while(xx--){for(i = 0; i < 400; i++);}}int main(){while(1){led1 = 1//灭delay(100);led1 = 0;//亮delay(100);}}
#include <S3C2440.h>#define LED_A_ON(i) GPADAT &= ~(0x1 << i) //A口i灯亮#define LED_B_ON(i) GPBDAT &= ~(0x1 << i) //B口i灯亮#define LED_A_OFF(i) GPADAT |= (0x1 << i) //A口i灯亮#define LED_B_OFF(i) GPBDAT |= (0x1 << i) //B口i灯亮void LED_INIT(void);//初始化控制灯void delay(unsigned int xx);//延时int main(){LED_INIT();while(1)//流水灯实验{LED_B_ON(5);LED_B_OFF(6);LED_A_OFF(25);LED_A_OFF(26);delay(100);LED_B_ON(6);LED_B_OFF(5);LED_A_OFF(25);LED_A_OFF(26);delay(100);LED_A_ON(25);LED_B_OFF(5);LED_B_OFF(6);LED_A_OFF(26);delay(100);LED_A_ON(26);LED_B_OFF(5);LED_B_OFF(6);LED_A_OFF(25);delay(100);}}void LED_INIT()//初始化控制灯{GPBCON &= ~(0x03 << 10);//GPB5清零GPBCON |= (0x01 << 10); //置1GPACON &= ~(0x3 << 25);GPADAT |= (0x3 << 25);GPBDAT |= (0x3 << 5);delay(10000);}
原文：http://www.cnblogs.com/jianghanxv/p/5521695.html