I'm trying to manipulate my GPIOs using C code and running into "Permission
Denied" when running my code and opening the file /sys/class/gpio/export.
I'm using nano editor, compiling on the Beaglebone with gcc, and I'm under
root user.
I would like to do this, so I can set directions and values for the GPIOs
with my code. I've heard this might be a problem with user and kernel space
conflicting. I know there are library calls in python and other languages
to do this that work. Does anyone know what this problem might be and our
their alternate calls I can do in C?
I tried to just include the necessary parts of the code.
Code:
#include<fcntl.h>
static const char *GPIO_PATH = "/sys/class/gpio/export";
int main(){
int file;
if ((file = open(GPIO_PATH, O_RDWR))<0){
perror("GPIO: Can't open the device.");
return -1;
}
return 0;
}
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