Raspberry Pi Pico PIO - Ep. 9 - Direct Memory Access and Pulse Width Modulation: A Deeper Dive

Join David as he takes a deeper dive into Direct Memory Access (DMA) and Pulse Width Modulation (PWM) for the RP2040. Included is an example on sequencing through a series of GPIO pins without any processor involvement after the sequence has started. 00:00 - Introduction 01:32 - DMA refresher 02:15 - DMA chaining and aliases 05:00 - PWM details, slices, and channels 07:30 - Detailed example 08:15 - PWM code 09:50 - DMA code 18:45 - Closing Links: Files for this episode: https://github.com/LifeWithDavid/Raspberry-Pi-Pico-PIO/blob/main/dma_step_fade.c RP204 Datasheet: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf Raspberry Pi Pico C/C++ SDK: https://datasheets.raspberrypi.org/pico/raspberry-pi-pico-c-sdk.pdf PWM basics video: https://www.youtube.com/watch?v=GQLED3gmONg&t=434s Music: (Pinnacle 19.5 royalty-free music): Pulsing Dance House Fever Reaction Time City Night Groove