?? gpio_test.c
字號(hào):
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include "gpio_test.h"
#define DEVICE_GPIODRV "/dev/gpiotest"
int main()
{
int fd;
int val=-1;
if((fd=open(DEVICE_GPIODRV,O_RDONLY | O_NONBLOCK))<0)
{
printf("open device: %s\n",DEVICE_GPIODRV);
perror("can not open device");
exit(1);
}
while(1){
printf("0:set ,1:clear,2: quit :");
scanf("%d",&val);
if(val==0)
ioctl(fd,IOWRITE,0);
else if(val==1)
ioctl(fd,IOCLEAR,0);
else if(val==2){
close(fd);
return 0;
}else{
printf("val is %d\n",val);
continue;
}
}
return 0;
}
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