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Home > The Amp Hour Electronics Podcast > #637 – CH32V003…fun! with CNLohr


	Podcast:		The Amp Hour Electronics Podcast
	Episode:		#637 – CH32V003…fun! with CNLohr
	Category:		Science & Medicine
	Duration:		01:15:12
	Publish Date:		2023-06-25 21:04:00
	Description:		Welcome to the show, CNLohr of the YouTube channel of the same name! CNLohr has been working on projects and a library for the ch32v003, the $0.10 RISC V part Dave has made a video about that part, using the official toolchain from MounRiver How far will you take the chip? Moving from knowing the arm instruction set to the RISC V instruction set The benefits of knowing assembly The CH32V003 is a RISC V part in the low end space made by WCH. CN thinks it’s about eqiuvalent to an AVR You can buy a dev board on Tindie (this is the one Dave and Chris have) Compiler tooling is done for you AVR GCC While discussing Espressif entering the market the way in which they did, CN said, “There’s only going to be one of these in all of computing” Community reversing esp8266 using a virtual machine that had a leaked toolchain on it. Compared to cc2500 / mediatek / realtek ESP8266 without an RTOS “nonOS SDK“ lwip and wifi stack Community port of FreeRTOS onto the ESP8266 CN worked on the “NoSDK 8266“ It didn’t have the WiFi enabled which meant timing wasn’t critical and he could overclock it to 380 MHz Minecraft on a microscope slide Ethernet on an AVR Other people in this space igor plug lwusb is massive (relative to the space on the CH32V003) What about the support burden of writing things yourself? Chris made a comparision to college USB on CH32v003 CNLohr already had hardware on hand for decoding and debugging the USB stack He livestreamed the development! Chris said he was not sure he could livestream, but CN said that the audience acts like rubber ducks and pair programming ESPUSB vusb on avr Does communicty work like this have an influence on the market? Padouk 3-8 cent micro Grainuum library (later figured out it was written by past guest xobs!) lufa / tinyusb What are the physical requirements to implement USB without a transceiver? Only real thing is you need a pullup on the USB D- line You also need to change pins from intput to output in the window of responding Can make HID devices, but everything is low speed USB (1.5 Mbps) CN built the Nixie tube controller On GitHub there are examples on how to use various aspects of the part The chip has DMA During the chip shortages, CN was browsing lcsc and found a 10:1 transformer and wondered if he could make a flyback with it Single wire debug Check out the CH332V003fun library on github Getting started The next few months CN will be working on getting everything to be really good for the library There will also be support for other (larger, more expensive) parts Join the Discord! (cnlohr) Follow CNLohr on YouTube
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