https://blog.usedbytes.com/tags/rp2040/ Recent content in RP2040 on usedbytes:Blog Hugo -- gohugo.io Mon, 13 Jun 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/06/m0o-shepherds-pi/ Mon, 13 Jun 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/06/m0o-shepherds-pi/ So clearly there are some issues to work out, but this was bit-banged from an OV7670 on a Pico. PIO next. #raspberrypi #PiWars pic.twitter.com/yJFQFhU9Xk — Brian Starkey (@usedbytes) September 14, 2021 [M0o+](https://blog.usedbytes.com/tags/m0o+/) -- The last of the three “prescribed” challenges is Shepherd’s Pi. In this challenge there are 6 sheep which need herding into a pen, and 3 wolves which must not be “killed” (knocked over). Challenge Decisions I started out hoping to do all three challenges autonomously, but when it came down to it I’ve had to complete Shepherd’s Pi via remote control. https://blog.usedbytes.com/2022/06/m0o-natures-bounty/ Sun, 12 Jun 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/06/m0o-natures-bounty/ So clearly there are some issues to work out, but this was bit-banged from an OV7670 on a Pico. PIO next. #raspberrypi #PiWars pic.twitter.com/yJFQFhU9Xk — Brian Starkey (@usedbytes) September 14, 2021 [M0o+](https://blog.usedbytes.com/tags/m0o+/) -- After tackling Hungry Cattle, Nature’s Bounty is next on the hit-list. Lots of videos/pictures in this post, because I think it helps a lot with explaining how it all works. The challenge is pretty daunting: The robot must find an apple tree, and pick 12 apples from it, three times in a row, in 5 minutes or less. https://blog.usedbytes.com/2022/06/m0o-hungry-cattle/ Sat, 11 Jun 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/06/m0o-hungry-cattle/ So clearly there are some issues to work out, but this was bit-banged from an OV7670 on a Pico. PIO next. #raspberrypi #PiWars pic.twitter.com/yJFQFhU9Xk — Brian Starkey (@usedbytes) September 14, 2021 [M0o+](https://blog.usedbytes.com/tags/m0o+/) -- Hungry Cattle is probably the easiest of the three main Pi Wars challenges to do autonomously and so is the one I chose to tackle first. The basic premise is delivering “cattle feed” (rice) to three troughs, placed at known positions within the arena. https://blog.usedbytes.com/2022/05/m0o-computer-vision/ Sun, 29 May 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/05/m0o-computer-vision/ So clearly there are some issues to work out, but this was bit-banged from an OV7670 on a Pico. PIO next. #raspberrypi #PiWars pic.twitter.com/yJFQFhU9Xk — Brian Starkey (@usedbytes) September 14, 2021 [M0o+](https://blog.usedbytes.com/tags/m0o+/) -- To be able to locate the different game pieces in the Pi Wars challenges M0o+ has a very basic camera. M0o+ is using a Pico for all the processing, so there’s really no chance of porting OpenCV to it. https://blog.usedbytes.com/2022/05/m0o-software-overview/ Sun, 15 May 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/05/m0o-software-overview/ So clearly there are some issues to work out, but this was bit-banged from an OV7670 on a Pico. PIO next. #raspberrypi #PiWars pic.twitter.com/yJFQFhU9Xk — Brian Starkey (@usedbytes) September 14, 2021 [M0o+](https://blog.usedbytes.com/tags/m0o+/) -- I’ve written a number of posts now about different “building blocks” which make up M0o+: The bootloader The network/bluetooth interface The chassis The camera The boom, parts 1, 2, and 3. There’s one crucial element missing from that list, which is needed to turn a collection of parts into an actual functioning robot than can compete in Pi Wars: The Software. https://blog.usedbytes.com/2022/02/pico-pio-camera/ Sat, 19 Feb 2022 00:00:00 +0000 https://blog.usedbytes.com/2022/02/pico-pio-camera/ This is a lengthy post which goes into lots of detail. The tl;dr is that the code is here: https://github.com/usedbytes/camera-pico-ov7670 In this post I’ll describe how I went about connecting an OV7670 camera module to the Raspberry Pi Pico that drive’s my Pi Wars at Home 2022 ‘bot M0o+. It’s all wrapped up in a separate library which should be easy-ish to incorporate in other projects. Trying to get this camera working was the very first thing I did, as a sort of Pico “feasibility study” to decide if entering a Pico-based robot was practical. https://blog.usedbytes.com/2021/12/pico-serial-bootloader/ Wed, 01 Dec 2021 00:00:00 +0000 https://blog.usedbytes.com/2021/12/pico-serial-bootloader/ My Pi Wars 2022 entry, M0o+, is powered by a Raspberry Pi Pico, which itself is powered by the RP2040 chip. The RP2040 has a built-in boot ROM with a USB bootloader, which allows the chip to show up as a USB flash drive for uploading code. This is usually a very convenient interface, making it extremely quick and simple to upload code to the device. However, in a Pi Wars robot, I don’t want to have to bring the Pico back to my computer and plug it in to iterate on the code - I see it as essential to be able to download new code to the robot wirelessly without needing to touch it.