STM32 digital synthesiser

We've all had too much fun spamming different sounds on the keyboards in music class at school. For the Embedded Systems module, I wrote real-time firmware for a digital synthesiser, running on an STM32.

Working with low-level hardware features of the MCU, up to handling FreeRTOS processes, this project taught many core concepts of embedded systems. Using the DMA to transfer audio samples from a buffer in RAM, interrupt frequency was reduced. Careful task priority, based on task interval, ensured real-time control of the audio and reading of the inputs.

Knowledge gained:

• Embedded systems design
• MCU internal hardware
• Critical instant anaylsis of real-time systems
• Safe handling of shared data in multi-threaded systems

Check out some of the sounds it can make by perusing this video!

Go back home.