Hi everybody. I'm writing an Qtopia application to control the led through led's driver. int fd; fd = open("/dev/leds0", 0); if (fd < 0) { fd = open("/dev/leds", 0); } if (fd < 0) { return; } ioctl(fd, 1, 1); //turn led1 on close(fd); i put those code in Qtopia file (led.cpp). I did compile it successful. And the application load rightly in mini2440 board. However, when i press the button which run above code, the whole system is stopped running -> i have to press reset button :( Someone know this problem, please help me, thankss.
Qtopia and led's driver
Hi again. I face a new problem with this driver. When i removed the code "close(fd)", it just works for the first time :( I try to use Qfile to open led's driver, it works fine with "close(fd)", but i could not read the data from led's driver but only the normal file. Who knows this problem? please help me