github.com/elehobica/pico_tinygo_buttons

Raspberry Pi Pico TinyGo Buttons

Overview

This project is a library for handling multiple buttons on Raspberry Pi Pico by TinyGo.

• confirmed with TinyGo 0.27.0

This project features to detect:

• Single Push event
• Repeated Single Push event
• Multiple Push event (exclusive with Repeated Single)
• Long (Long) Push event (exclusive with Repeated Single)

Supported Board and Device

• Raspberry Pi Pico
• 5 Way Switch + 2 Buttons

Pin Assignment & Connection

5 Way Switch + 2 Buttons

Pico Pin #	Pin Name	Function	Connection
23	GND	GND	COM
24	GP18	GPIO Input	RESET
25	GP19	GPIO Input	SET
26	GP20	GPIO Input	CENTER
27	GP21	GPIO Input	RIGHT
29	GP22	GPIO Input	LEFT
31	GP26	GPIO Input	DOWN
32	GP27	GPIO Input	UP

How to build

• Build is confirmed only in TinyGo Docker environment with Windows WSL2 integration
• Before starting docker, clone repository to your local enviroment (by GitBash etc.)

> cd /d/somewhere/share
> git clone -b main https://github.com/elehobica/pico_tinygo_buttons.git

• Docker

> wsl
(in WSL2 shell)
$ docker pull tinygo/tinygo:0.27.0
$ docker images
$ docker run -it -v /mnt/d/somewhere/share:/share tinygo/tinygo:0.27.0 /bin/bash
(in docker container)
# cd /share

(copy repository for docker native directory for best performance of WSL2, otherwise stay /share)
(# cp -r /share/pico_tinygo_buttons ~/ && cd ~ )

# cd pico_tinygo_buttons

• Go Module Configuration

# go mod init github.com/elehobica/pico_tinygo_buttons
# go mod tidy

• TinyGo Build

# tinygo build -target=pico --serial uart -o pico_tinygo_buttons.uf2

(copy UF2 back to Windows local if working on docker native directory)
(# cp pico_tinygo_buttons.uf2 /share/pico_tinygo_buttons/ )

• Put UF2

Then, go back to Windows environment and put "pico_tinygo_buttons.uf2" on RPI-RP2 drive

Usage Guide

Button Function Assignment

• Multiple / Long / LongLong detection for Center button
• Single / Repeated Single detection for Left/Right/Up/Down buttons
• Single detection for Set/Reset buttons

Note

• If Multiple detection enabled, time lag defined by 'actFinishCnt' is needed to determine action
• Repeat count information of Repeated Single detection is served for UI items to accelerate something by continuous button push
• Use NewButtonConfig() for customizing button detection parameters other than default configurations
• Trriple clicks of Center button shows processing time of button scan function (in this example project)

Log Example

=========================
== pico_tinygo_buttons ==
=========================
center: 1
left: 1
right: 1
up: 1
up: 1
right: 1
down: 1
down: 1 (Repeated 1)
down: 1 (Repeated 2)
center: 2
set: 1
reset: 1
center: Long
center: LongLong
center: 3
time 41us (scan: 650)