GPIO的两种调用方法事例(2)

printf(\ }else {

// already pressed down! let's count the time! t_now = time(NULL);

if (t_now-t_old>=TIME_OUT && flag_issued==0){

// Pressed LONG ENOUGH, issue the handler script!! flag_issued = 1; longtu_timeout(); } } }else{

// No button pressed. if (flag_issued){ flag_issued = 0;

printf(\.\\n\ } }

last_val = val; usleep(100); }

munmap(base, 0x000); close(mfd); return 0; }

http://bbs.csdn.net/topics/380159421

http://blog.csdn.net/williamwanglei/article/details/8636564