GymPal

A simple device for recording gym sessions, using AVR.

The GymPal is a lightweight piece of hardware with built-in storage, time-keeping, display, and controls, to allow you to record exercise metrics on-the-fly in a satisfying, tactile way.

Development

The software for this system is developed in C, using avr-libc, and the build toolchain is managed by make, using avr-gcc and avr-dude to upload firmware to the Atmega328p microcontroller.

sudo apt install gcc-avr
sudo apt install avr-libc
sudo apt install avrdude

After cloning this repository, you must first compile the build script with ./prepare-build-tools.d. Then, you can run ./build <command> to run various build commands. See ./build help for more information.

Hardware

Here's a list of the hardware that this project uses, just for reference:

• Microprocessor: Atmega328p
• Real-Time-Clock: DS3231SN
• Display (subject to change): SSD1306 OLED 128x64
• Onboard storage: Adafruit SD Card Module

Helpful Links

The following links are helpful for learning how to program an AVR-based microcontroller.

• avr-libc Homepage
• avr-libc Library Reference
• avrdude Firmware Uploader