gpio_test.c

三星公司的ARM芯片S3C2440的gpio驱动程序

/*
 * John zsh
 * mailzang.bokee.com
 *
 */

#include <stdio.h> 
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>

#define DEVICE_GPIODRIV "/dev/gpio_2440"

#include "gpio_2440.h"

int main(void)
{
	int fd; 
	int val=-1;
	int c;

	if((fd=open(DEVICE_GPIODRIV,O_RDWR | O_NONBLOCK))<0)
	{
		perror("open failed !! :can not open device"); 
		exit(1); 
	}


	while(1) {
#ifdef AT91RM9200_GPIO_ZSH

		printf("gpio_9200 select:\n");
		printf("0-get 1-set/clr 2-GPC14Low 3-GPC14High 4-GPC15Low 5-GPC15High 6-exit\n");
		scanf("%d", &c);
		if(c==0) {
			// GET test
				int t;
				ioctl(fd,IOSET, GPC14);
				ioctl(fd,IOGET, (unsigned long)(&t));
				printf("%x \n",t);
				usleep(100000);
				ioctl(fd,IOCLR, GPC14);
        			ioctl(fd,IOGET, (unsigned long)(&t));
        			printf("%x \n",t);
		}
		else if (c==1) {
			// SET & CLR test
			for(;;) {
				ioctl(fd, IOSET, GPC14);
				usleep(100000);
				ioctl(fd, IOCLR, GPC14);
				usleep(100000);
				ioctl(fd, IOSET, GPC15);
				usleep(100000);
				ioctl(fd, IOCLR, GPC15);
				usleep(100000);
			}
		}
		else if(c==2){
			ioctl(fd, IOCLR, GPC14);
		}
		else if(c==3){
			ioctl(fd, IOSET, GPC14);
		}
		else if(c==4){
			ioctl(fd, IOCLR, GPC15);
		}
		else if(c==5){
			ioctl(fd, IOSET, GPC15);
		}
		else if (c==6) {
			close(fd);
			exit(0);
		}
#endif
#ifdef S3C2440_GPIO_ZSH

printf("gpio_2440 select:\n");
printf("0-get 1-set/clr 2-GPF4Low 3-GPF4High 4-GPF5Low 5-GPF5High  6-GPF6Low 7-GPF6High  8-GPF7Low 9-GPF7High 10-exit\n");
		scanf("%d", &c);
		if(c==0) {
			// GET test
				int t;
				ioctl(fd,IOSET, GPF4);
				ioctl(fd,IOGET, (unsigned long)(&t));
				printf("%x \n",t);
				usleep(100000);
				ioctl(fd,IOCLR, GPF4);
        			ioctl(fd,IOGET, (unsigned long)(&t));
        			printf("%x \n",t);
		}
		else if (c==1) {
			// SET & CLR test
			for(;;) {
				ioctl(fd, IOSET, GPF4);
				usleep(100000);
				ioctl(fd, IOCLR, GPF4);
				usleep(100000);
				ioctl(fd, IOSET, GPF5);
				usleep(100000);
				ioctl(fd, IOCLR, GPF5);
				usleep(100000);
				ioctl(fd, IOSET, GPF6);
				usleep(100000);
				ioctl(fd, IOCLR, GPF6);
				usleep(100000);
				ioctl(fd, IOSET, GPF7);
				usleep(100000);
				ioctl(fd, IOCLR, GPF7);
				usleep(100000);
			}
		}
		else if(c==2){
			ioctl(fd, IOCLR, GPF4);
		}
		else if(c==3){
			ioctl(fd, IOSET, GPF4);
		}
		else if(c==4){
			ioctl(fd, IOCLR, GPF5);
		}
		else if(c==5){
			ioctl(fd, IOSET, GPF5);
		}
		else if(c==6){
			ioctl(fd, IOCLR, GPF6);
		}
		else if(c==7){
			ioctl(fd, IOSET, GPF6);
		}
		else if(c==8){
			ioctl(fd, IOCLR, GPF7);
		}
		else if(c==9){
			ioctl(fd, IOSET, GPF7);
		}
		else if (c==10) {
			close(fd);
			exit(0);
		}
#endif
	}
	
	close(fd);	
}