testgpio.c

AT9260处理器Linux2.6.24内核通用IO驱动程序

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


#define	OUT0			0x00
#define	OUT1			0x01
#define	OUT2			0x02
#define	OUT3			0x03
#define	OUT4			0x04
#define	OUT5			0x05
#define	OUT6			0x06
#define	OUT7			0x07
#define	OUT8			0x08
#define	OUT9			0x09
#define	OUT10			0x0A
#define	OUT11			0x0B
#define	OUT12			0x0C
#define	OUT13			0x0D
#define	OUT14			0x0E
#define	OUT15			0x0F

#define	IN0			0x00
#define	IN1			0x01
#define	IN2			0x02
#define	IN3			0x03
#define	IN4			0x04
#define	IN5			0x05
#define	IN6			0x06
#define	IN7			0x07
#define	IN8			0x08
#define	IN9			0x09
#define	IN10			0x0A
#define	IN11			0x0B
#define	IN12			0x0C
#define	IN13			0x0D

#define	GPIO_SET		0x01
#define	GPIO_GET		0x02


typedef struct gpio_data {
	unsigned int pin;
	unsigned int data;
}gpio_data;



int main()
{
	static struct gpio_data local_data;
	int i = 0;
	int fd = 0;

	fd = open("/dev/GPIO", O_RDWR);
	if(fd < 0){
		printf("Device open failed!\n");
		exit(1);
	}

	for(i = 0; i < 16; i ++){
		local_data.pin = i;
		local_data.data = 1;
		ioctl(fd, GPIO_SET, &local_data);
	}

	sleep(3);

	for(i = 0; i < 16; i ++){
		local_data.pin = i;
		local_data.data = 0;
		ioctl(fd, GPIO_SET, &local_data);
	}

	for(i = 0; i < 14; i ++){
		local_data.pin = i;
		ioctl(fd, GPIO_GET, &local_data);
		printf("Port[IN%d]: %d\n", i, local_data.data);
//		sleep(1);
	}

	close(fd);

	return 0;
}