juicechu / go-npio

go-npio

Native GPIO-Gophers for your NanoPi!

go-npio is a Go library for accessing GPIO-pins on the [NanoPi M1 Plus].

Releases

• 0.0.1 - Support NanoPi M1 Plus.

#Todo

• [] PWM
• [] Clock
• [] Support NanoPi NEO and other NanoPi

Usage

import "github.com/juice/go-npio"

Open memory range for GPIO access in /dev/mem

err := npio.Open()

Initialize a pin, run basic operations. Pin refers to the wPi pin, not the physical pin on the NanoPi header. Pin 10 here is exposed on the pin header as physical pin 24.

pin := npio.Pin(10)

pin.Output()       // Output mode
pin.High()         // Set pin High
pin.Low()          // Set pin Low
pin.Toggle()       // Toggle pin (Low -> High -> Low)

pin.Input()        // Input mode
res := pin.Read()  // Read state from pin (High / Low)

pin.Mode(npio.Output)   // Alternative syntax
pin.Write(npio.High)    // Alternative syntax

Pull up/down/off can be set using:

pin.PullUp()
pin.PullDown()
pin.PullOff()

pin.Pull(rpio.PullUp)

Unmap memory when done

npio.Close()

Other

Currently, it supports basic functionality such as:

• Pin Direction (Input / Output)
• Write (High / Low)
• Read (High / Low)

It works by memory-mapping the NanoPi M1 Plus gpio range, and therefore require root/administrative-rights to run.