Accessing GPIO and LED Blinking - LED Blinking Program in C for Beaglebone Black board

In this video tutorial, we are showing how to use GPIO or General Pupose I/O pins of Beaglebone Black Board. You will learn using available GPIO driver in Embedded Linux. We will use LED connected to GPIO and blink LED. We will write C program for LED blinking.

Topics covered in this video tutorial ...
Introduction to Beaglebone Black
GPIO Programming
LED Interfacing
C Program
Build and Run C Program on Beaglebone Black Board


C Program

Include following files using... stdio.h, unistd.h, fcntl.h

#define LOOP 5
int main (void)
{
int i=0,f=0;

// set direction out
f=open("/sys/class/gpio/gpio60/direction",O_RDWR);
write(f,"out",3);
close(f);
f=open("/sys/class/gpio/gpio60/value",O_WRONLY);
// Note - correct i = LOOP, make it i less than or equal to LOOP
for(i=1;i=LOOP;i++)
{
// LED On
write(f,"1",1);
sleep(1);
// LED off;
write(f,"0",1);
sleep(1);
}
close(f);

printf("\nLED Blink Program is terminated !!!");
} // end of main

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