go-rpio/examples/blinker/blinker.go

/*

A blinker example using go-rpio library.
Requires administrator rights to run

Toggles a LED on physical pin 19 (mcu pin 10)
Connect a LED with resistor from pin 19 to ground.

*/

package main

import (
	"fmt"
	"github.com/stianeikeland/go-rpio"
	"os"
	"time"
)

var (
	// Use mcu pin 10, corresponds to physical pin 19 on the pi
	pin = rpio.Pin(10)
)

func main() {
	// Open and map memory to access gpio, check for errors
	if err := rpio.Open(); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	// Unmap gpio memory when done
	defer rpio.Close()

	// Set pin to output mode
	pin.Output()

	// Toggle pin 20 times
	for x := 0; x < 20; x++ {
		pin.Toggle()
		time.Sleep(time.Second / 5)
	}
}