u/FunDeckHermitin r/embedded • Recommends
On “What are some microcontroller companies that value hobbyists?”
The PIO feature is really interesting.
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In-depth: Raspberry Pi Pico's PIO - programmable I/O!
stacksmashing
229K subscribers • 15 videos on Hallway
- Recommended by 2 people: 2 in engineering communities.
- Presented by stacksmashing
- Linked in the descriptionraspberrypi/pico-examples
Intermediate. Assumes working knowledge.
176K views5 years ago2 recommendations
HardwareSystems programmingCPUs and computer architectureEmbedded systems
An in-depth technical exploration of the RP2040 microcontroller's unique Programmable I/O block and how it works.
In this video we take an in-depth look into the new Raspberry Pi Pico/RP2040 high-speed programmable I/O system: PIO! For a high level video check youtube.com/watch?v=o-tRJPCv0GA! I know this video is quite fast-paced and dense, but I'm trying to experiment with different formats for these in-depth videos :) Errata: - - the register is always decremented, not only if the condition is met - - The pin will be OFF for one cycle and ON for 2 cycles - said it the other way around accidentally - Luke on Twitter: twitter.com/wren6991 - Pico PIO examples: github.com/raspberrypi/pico-examples/tree/master/pio - C SDK Book: datasheets.raspberrypi.org/pico/raspberry-pi-pico-c-sdk.pdf - BBC Micro Emu on the Pico: youtube.com/watch?v=WaPJmCgseQw Links: - Twitter: twitter.com/ghidraninja - Patreon: patreon.com/stacksmashing Timestamps: - Intro - PIO architecture - The state machine - IO Mapping - Set Instruction - Jump Instruction - Mov Instruction - In/Out Instructions - Push/Pull Instructions - IRQ Instruction - Wait Instruction - Delay - Side-Set - Program WrappingWhy it's here
2 people recommend thisWhat people say. Recommended as a mandatory watch for understanding the powerful PIO capabilities of the Raspberry Pi Pico.
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u/FunDeckHermitin r/embedded • Recommends
On “RP2040 development”
I have made a BLDC motor controller with a Pi Pico.
1. Development is quite easy as it's just plug and play. Write code and put it on the pico through USB. PIO is quite a learning curve but it is very very powerful if you need something specific.
2. Dedicated USB hardware or tinkering with PIO
Mandatory PIO YouTube video
GitJer's repository
Blues Blog
u/Lekgolo167in r/embedded • Recommends
On “Does the RP2040 bit-bang its SPI interface or is there dedicated hardware? If the latter, which memory addresses do I 'byte-bang' to directly interact with an SPI peripheral?”
I guess I should be a bit more descriptive with that explanation. The pins are like 1-10, 21-24 for SPI0 but the SCLK for example would be pins 4, 24 or 8. I guess a better way to word it is the controller's SPI interface is routed out to a lot of pins (not that the pins functionality can be routed to any pin) . But still more flexible than only have 2 ports. If you're new to the Pico you may also find the programmable IO very interesting (see more here link to this video basically mini-state machines that control the IO.