芯灵思Sinlinx A33开发板Linux中断编程 3-应用程序

应用程序代码参考

#include

#define DEV_NAME "/dev/mybtn"

int main(int argc, char *args[])

{

int fd = 0;

int ret = 0;

unsigned char recv_buf[1] = {"0"};

fd = open(DEV_NAME, O_RDONLY);

//fd = open(DEV_NAME, O_RDONLY|O_NONBLOCK);

if(fd < 0) {

perror("open");

}

while(1) {

strcpy(recv_buf, "0000");

//读取按键数据

ret = read(fd, recv_buf, 1);

if((ret < 0) && (errno != EAGAIN)) {

perror("read");

exit(-1);

}

//输出按键状态

printf("%srn", recv_buf);

}

return 0;

}

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