ARM板控制LED灯驱动代码和应用代码

#include<unistd.h> #include<sys/types.h> #include<sys/stat.h> #include<fcntl.h> #include<stdlib.h> #include<stdio.h> #include<pthread.h> #include<semaphore.h> #define DEV "/dev/2440led" #define LED_1_OFF 0x00 #define LED_2_OFF 0x10 #define LED_3_OFF 0x20 #define LED_4_OFF 0x30 #define LED_1_ON 0x01 #define LED_2_ON 0x11 #define LED_3_ON 0x21 #define LED_4_ON 0x31 #define LED_FLASH_TIME 100000 //100ms void led_open(int fd,int id); void led_close(int fd,int id); int id,fd; sem_t sem; void thread1(void *arg) { while(1) { sem_wait(&sem); printf("\n\n================欢迎来到手动模式界面================\n\n"); printf("1.生活模式\n"); printf("2.聚会模式\n"); printf("3.节日模式\n"); printf("4.娱乐模式\n"); printf("\n\n================欢迎来到自动模式界面================\n\n"); printf("5.省电模式\n"); printf("6.睡觉模式\n"); printf("7.工作模式\n"); printf("8.退出模式\n"); printf("\n\nplease slect:"); scanf("%d",&id); if(id>=8) break; sem_post(&sem); } } void thread2(void *arg) { while(1) { sem_wait(&sem); if(id==1) { printf("\n\n================欢迎来到生活模式界面================\n\n"); printf("\n\n================祝你生活愉快！================\n\n"); led_open(fd,2); led_open(fd,3); led_open(fd,1); led_open(fd,4); } if(id==2) { printf("\n\n================欢迎来到聚会模式界面================\n\n"); printf("\n\n================祝大家聚会快乐！================\n\n"); while(1) { led_open(fd,1); led_open(fd,2); led_open(fd,3); led_open(fd,4); sleep(1); led_close(fd,1); led_close(fd,2); led_close(fd,3); led_close(fd,4); sleep(1); } } if(id==3) { printf("\n\n================欢迎来到节日模式界面================\n\n"); printf("\n\n================祝你及你的家人团团圆圆！================\n\n"); while(1) { led_open(fd,1); led_open(fd,3); sleep(1); led_open(fd,2); led_open(fd,4); led_close(fd,1); led_close(fd,3); sleep(1); led_close(fd,2); led_close(fd,4); sleep(2); } } if(id==4) { printf("\n\n================欢迎来到娱乐模式界面================\n\n"); printf("\n\n================难得今天歇息，好好玩吧！================\n\n"); while(1) { led_open(fd,4); led_open(fd,1); sleep(2); led_open(fd,2); led_open(fd,3); led_close(fd,1); led_close(fd,3); sleep(1); led_close(fd,2); led_close(fd,4); sleep(1); led_open(fd,1); led_open(fd,4); led_open(fd,2); led_open(fd,3); sleep(3); led_close(fd,3); led_close(fd,4); sleep(4); } } if(id==5) { led_open(fd,1); led_open(fd,4); led_close(fd,2); led_close(fd,3); } if(id==6) { led_close(fd,4); led_open(fd,1); led_open(fd,2); led_open(fd,3); sleep(2); led_close(fd,1); sleep(5); led_close(fd,2); sleep(10); led_close(fd,3); } if(id==7) { led_close(fd,4); led_close(fd,1); led_open(fd,2); led_open(fd,3); sleep(10); led_close(fd,3); sleep(2); led_close(fd,2); } sem_post(&sem); close(fd); } } int main(void) { pthread_t id1,id2; int fd,ret; ret=sem_init(&sem,0,1); if(ret!=0) { perror("sem_init"); } if((fd=open(DEV,O_RDWR))<0) printf("open led error\n"); ret=pthread_create(&id1,NULL,(void *)thread1,(void *)id); if(ret!=0) { printf("Create pthread error!\n"); exit(1); } ret=pthread_create(&id2,NULL,(void *)thread2,(void *)id); if(ret!=0) { printf("Create pthread error!\n"); exit(1); } pthread_join(id1,NULL); pthread_join(id2,NULL); exit(0); } void led_close(int fd,int id) { int led; switch(id) { case 1: led=LED_1_OFF; break; case 2: led=LED_2_OFF; break; case 3: led=LED_3_OFF; break; case 4: led=LED_4_OFF; break; default: led=0xff; break; } write(fd,&led,1); } void led_open(int fd,int id) { int led; switch(id) { case 1: led=LED_1_ON; break; case 2: led=LED_2_ON; break; case 3: led=LED_3_ON; break; case 4: led=LED_4_ON; break; default: led=0xff; break; } write(fd,&led,1); }