DM6446之GPIO中止

2012-06-20

DM6446之GPIO中断应用程序如下所示。#include stdio.h#include stdlib.h#include unistd.h#include

DM6446之GPIO中断

<br><p>应用程序如下所示。<br><textarea readonly name="code" class="html">#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <sys/ioctl.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h> #include <sys/select.h>#include <sys/time.h> #include <errno.h> /int main(void){    int fd,key_value,ret;    fd=open("/dev/key",0);     if(fd<0){        perror("open /dev/key error!\n");        exit(1);    }    printf("open /dev/key sucessfully!\n");    while(1){        ret=read(fd,&key_value,sizeof(key_value));         printf("In main(),key_value is '%d'\n\n",key_value);    }   close(fd);    return 0;}

1楼azhgul12小时前: 内核版本为2.6.18