Hi, got my mini today. Nice board. I need to use all 4 adc channel (under Linux Qtopia 2.2), if i use /dev/adc i can get the first, but what about the other 3? Any way to read? Any api in the kernel? Thanks in advice ANY
ADC input
Have you got the factory DVD? #include <sys/ioctl.h> #include <fcntl.h> #include <linux/fs.h> #include <errno.h> #include <string.h> int main(void) { fprintf(stderr, "press Ctrl-C to stop\n"); int fd = open("/dev/adc", 0); if (fd < 0) { perror("open ADC device:"); return 1; } for(;;) { char buffer[30]; int len = read(fd, buffer, sizeof buffer -1); if (len > 0) { buffer[len] = '\0'; int value = -1; sscanf(buffer, "%d", &value); printf("ADC Value: %d\n", value); } else { perror("read ADC device:"); return 1; } usleep(500* 1000); } close(fd); } I'd try putting a 1, 2 or 3 into: int fd = open("/dev/adc", 0); If that doesn't do it, then I'd go and read: http://lxr.linux.no/#linux+v2.6.32/arch/arm/plat-s3c24xx/adc.c#L75 Good luck!