guitar-me

Overview

A work-in-progress guitar multieffects platform, based on an STM32F303 microcontroller and its integrated analog peripherals.

Features

• Analog signal conditioning including anti-aliasing and reconstruction filters
• Real-time audio processing pipeline with DMA and double buffering
• Performance monitoring via busy/idle LED brightness
• Decimation and interpolation (CMSIS-DSP)
• Configurable peak IIR filter (CMSIS-DSP)
• Rotary encoder support for user control (via timer)
• Basic I2C OLED display configuration
• Button support, second encoder and advanced user control interface
• Displaying meaningful information on the OLED
• Solving OLED I2C's interference with real-time processing (DMA, maybe FreeRTOS?)
• Analog stage optimisation and PCB design

Build and run

cmake --preset [debug/release]                          # configure
cmake --build --preset [debug/release]                  # build
cmake --build --preset [debug/release] --target flash   # build and flash
./debug.sh                                              # debug with openocd and gdb