https://github.com/harbaum/maerklin

https://github.com/harbaum/maerklin

Last synced: 8 months ago
JSON representation

• Host: GitHub
• URL: https://github.com/harbaum/maerklin
• Owner: harbaum
• Created: 2021-05-18T13:35:12.000Z (about 5 years ago)
• Default Branch: main
• Last Pushed: 2021-05-18T13:55:30.000Z (about 5 years ago)
• Last Synced: 2025-10-11T00:59:25.643Z (8 months ago)
• Language: C++
• Size: 88.9 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
# Maerklin for Arduino

This repository contains code to control Maerklin digital

model train engines using a Arduino Pro Micro and the

L298 bridge driver.

![Breadboard setup](breadboard.png)

Three demos are provided. All three will blink the lights of

a Maerlkin steam engine.

## mmtestuart

This demo uses the USART in UART mode to generate the necessary

signals. It's the easiest one to understand as it uses the standard

Serial interface but generates some of the timing using busy waits.

## mmtestmspi

This demo uses the USART in SPI mode to generate the necessary

signals. This is similar to the UART variant but implemts SPI mode which

is technically simpler but requires direct hardware programming

to achieve the correct timing. This still needs some busy waiting code

and is thus difficult to combine with other code.

## mmtestmspiirq

This demo uses the USART in SPI mode and an interrupt handler to

generate the necessary signals. This solution is the most complex one

as the entire timing is generated within an interrupt handler.  The

big advantage of this solution is that the entire signal generation

runs in the background and no blocking busy waits are needed. The

entire arduinos is thus free to do other operations in the foreground like

doing USB communication to send and receive control commands.