First time using timer-triggered chained DMAs, where one DMA channel writes into the descriptors of another DMA channel to change what the other DMA is doing. This is just a 8x9 matrix array in a 6x12 configuration on a ch32v003, with #ch32fun github.com/cnlohr/cnhar...
June 13, 2025 at 5:39 AM
First time using timer-triggered chained DMAs, where one DMA channel writes into the descriptors of another DMA channel to change what the other DMA is doing. This is just a 8x9 matrix array in a 6x12 configuration on a ch32v003, with #ch32fun github.com/cnlohr/cnhar...
YAY! apparently the recent updates to CH32fun make it now work on my hardware!
I can do CH32!
I can do CH32!
March 3, 2025 at 7:20 PM
YAY! apparently the recent updates to CH32fun make it now work on my hardware!
I can do CH32!
I can do CH32!
August 21, 2025 at 12:40 AM
yay I have another working ch32 board. This should be a good replace for the pro mini. sadly the ch32fun version I have wont do the ch32v006 (yet)
March 14, 2026 at 12:48 AM
yay I have another working ch32 board. This should be a good replace for the pro mini. sadly the ch32fun version I have wont do the ch32v006 (yet)
So glad this finally landed in ch32fun. 100% open, plain and vanilla. Thanks for all the effort, Montemonte.
July 7, 2025 at 4:50 PM
So glad this finally landed in ch32fun. 100% open, plain and vanilla. Thanks for all the effort, Montemonte.
The code it meant to be compiled and run from /ch32fun/examples/ directory, so yea, ch32fun is a dependency.
The PS2 is bit-banged on 2 pins, the clock and data lines of the PS2 have 4.7k pullup resistors to 3.3V, with the mouse being powered by 5V.
This is running on a SOIC8 ch32v003J4M6
The PS2 is bit-banged on 2 pins, the clock and data lines of the PS2 have 4.7k pullup resistors to 3.3V, with the mouse being powered by 5V.
This is running on a SOIC8 ch32v003J4M6
August 16, 2026 at 8:00 PM
The code it meant to be compiled and run from /ch32fun/examples/ directory, so yea, ch32fun is a dependency.
The PS2 is bit-banged on 2 pins, the clock and data lines of the PS2 have 4.7k pullup resistors to 3.3V, with the mouse being powered by 5V.
This is running on a SOIC8 ch32v003J4M6
The PS2 is bit-banged on 2 pins, the clock and data lines of the PS2 have 4.7k pullup resistors to 3.3V, with the mouse being powered by 5V.
This is running on a SOIC8 ch32v003J4M6
github.com/ruenahcmohr/littlebot/…
here is the code for this bot so far.
sorry, it depends on the ch32fun library in a way I have not succesfully untangled yet.
here is the code for this bot so far.
sorry, it depends on the ch32fun library in a way I have not succesfully untangled yet.
https://github.com/ruenahcmohr/littlebot/…
January 18, 2026 at 6:14 PM
github.com/ruenahcmohr/littlebot/…
here is the code for this bot so far.
sorry, it depends on the ch32fun library in a way I have not succesfully untangled yet.
here is the code for this bot so far.
sorry, it depends on the ch32fun library in a way I have not succesfully untangled yet.
It seems my old WCH-LinkE USB programmer and #CH32V003 dev board vanished without a trace so I had to buy a new one. I modified the I²C OLED demo from the ch32fun repo of @cnlohr.bsky.social to show the #RISCV logo. 10¢ RISC V microcontroller FTW.
April 4, 2025 at 4:10 AM
It seems my old WCH-LinkE USB programmer and #CH32V003 dev board vanished without a trace so I had to buy a new one. I modified the I²C OLED demo from the ch32fun repo of @cnlohr.bsky.social to show the #RISCV logo. 10¢ RISC V microcontroller FTW.
This couldn't have been a better commit number to switch from ch32v003fun to #ch32fun. Glad to be able to help serve the community surrounding everyone's favorite line of #RISCV microcontrollers. Thank you to all the contributors for getting this project to go the distance.
February 26, 2025 at 9:49 PM
I will be giving a talk at Teardown 2025 on June 21, on the power of bringing up microcontrollers from nothing and the story behind ch32fun crowdsupply.com/teardown/por...
Teardown 2025 | Crowd Supply
www.crowdsupply.com
June 2, 2025 at 11:50 PM
I will be giving a talk at Teardown 2025 on June 21, on the power of bringing up microcontrollers from nothing and the story behind ch32fun crowdsupply.com/teardown/por...
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000minutes years
* 1.9013259
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000000minutes years
* 1901.3259
Fact check is clear! 👍
* 1.9013259
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000000minutes years
* 1901.3259
Fact check is clear! 👍
March 12, 2025 at 11:55 PM
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000minutes years
* 1.9013259
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000000minutes years
* 1901.3259
Fact check is clear! 👍
* 1.9013259
zippo:/morfiles/programming/c/ch32/ch32fun/examples/serialADC# units 1000000000minutes years
* 1901.3259
Fact check is clear! 👍
Turn a $0.10 CH32V003 MCU into a tiny PLD. Write logic in Verilog, (Verilator + @cnlohr.bsky.social 's ch32fun) lowers it to bare-metal C that bit-bangs GPIO. Slower than a real gate (0.6µs delay) but already in your drawer & can solder it & and it is 5V. github.com/wavedrom/cherepanov
GitHub - wavedrom/cherepanov: MCU as PLD
MCU as PLD. Contribute to wavedrom/cherepanov development by creating an account on GitHub.
github.com
July 28, 2026 at 8:57 PM
Turn a $0.10 CH32V003 MCU into a tiny PLD. Write logic in Verilog, (Verilator + @cnlohr.bsky.social 's ch32fun) lowers it to bare-metal C that bit-bangs GPIO. Slower than a real gate (0.6µs delay) but already in your drawer & can solder it & and it is 5V. github.com/wavedrom/cherepanov
There are smaller and cheaper ones that are still RISC-V, not some weirdo instruction set, and with decent peripherals. Look at CH32V for options from double core w/ USB3 down to single core and tens of KB of RAM for about $0.10. Good stuff!
Open-source tools include github.com/cnlohr/ch32fun
Open-source tools include github.com/cnlohr/ch32fun
GitHub - cnlohr/ch32fun: Open source minimal stack for the ch32 and ch5xx WCH RISC-V Microcontrollers
Open source minimal stack for the ch32 and ch5xx WCH RISC-V Microcontrollers - cnlohr/ch32fun
github.com
May 9, 2026 at 5:28 PM
There are smaller and cheaper ones that are still RISC-V, not some weirdo instruction set, and with decent peripherals. Look at CH32V for options from double core w/ USB3 down to single core and tens of KB of RAM for about $0.10. Good stuff!
Open-source tools include github.com/cnlohr/ch32fun
Open-source tools include github.com/cnlohr/ch32fun
ch32funはレジスタを直操作かつそれをマクロで呼び出す形式にしてるからバイナリが小さくなるのかな
March 12, 2026 at 10:43 AM
ch32funはレジスタを直操作かつそれをマクロで呼び出す形式にしてるからバイナリが小さくなるのかな
March 12, 2026 at 7:55 AM
And now I'm off implementing the i2c-puppet API on the #ch32v003. There isn't a lot of documentation on how to do things so I needed to read cnlohr's source code for #ch32fun and cross-check it with the #WCH reference manual for the microcontroller to figure out how to do things. #riscv #handheld
April 22, 2025 at 5:19 PM
UIAPduino + Arduino.hだと最適化が甘いのか、結構すぐFlashメモリがいっぱいになる。特にArudinoを使う時は、ライブラリを使いたいときなので余計に。
ch32funならかなり最適化され、小さなバイナリになるため積極的に使いたいものだがArduinoのライブラリ等とはお別れになる。
#電子工作
ch32funならかなり最適化され、小さなバイナリになるため積極的に使いたいものだがArduinoのライブラリ等とはお別れになる。
#電子工作
March 12, 2026 at 7:53 AM
UIAPduino + Arduino.hだと最適化が甘いのか、結構すぐFlashメモリがいっぱいになる。特にArudinoを使う時は、ライブラリを使いたいときなので余計に。
ch32funならかなり最適化され、小さなバイナリになるため積極的に使いたいものだがArduinoのライブラリ等とはお別れになる。
#電子工作
ch32funならかなり最適化され、小さなバイナリになるため積極的に使いたいものだがArduinoのライブラリ等とはお別れになる。
#電子工作
ch1115とかいう石の載ったoled買ってみた
動作テストしてなかったのでテストしてみました
u8g2のissue見てるとssd1306の設定で動くっぽいけど、私の試したch32funを謎mcu用に改変したやつだとssd1306ではなくsh1107を出発点にしないといけなかった
石の中のgramと表示で8行ズレてるみたいでそのへんの改良を盛り込んでた
mcuのram使用量やi2cの転送量を減らせたのでまんぞく
3個買ってたけど（このテストする前に）追加3個買ってたから届くの楽しみ
さらにあと3個買えたら買いたいね
動作テストしてなかったのでテストしてみました
u8g2のissue見てるとssd1306の設定で動くっぽいけど、私の試したch32funを謎mcu用に改変したやつだとssd1306ではなくsh1107を出発点にしないといけなかった
石の中のgramと表示で8行ズレてるみたいでそのへんの改良を盛り込んでた
mcuのram使用量やi2cの転送量を減らせたのでまんぞく
3個買ってたけど（このテストする前に）追加3個買ってたから届くの楽しみ
さらにあと3個買えたら買いたいね
May 17, 2026 at 9:50 AM
ch1115とかいう石の載ったoled買ってみた
動作テストしてなかったのでテストしてみました
u8g2のissue見てるとssd1306の設定で動くっぽいけど、私の試したch32funを謎mcu用に改変したやつだとssd1306ではなくsh1107を出発点にしないといけなかった
石の中のgramと表示で8行ズレてるみたいでそのへんの改良を盛り込んでた
mcuのram使用量やi2cの転送量を減らせたのでまんぞく
3個買ってたけど（このテストする前に）追加3個買ってたから届くの楽しみ
さらにあと3個買えたら買いたいね
動作テストしてなかったのでテストしてみました
u8g2のissue見てるとssd1306の設定で動くっぽいけど、私の試したch32funを謎mcu用に改変したやつだとssd1306ではなくsh1107を出発点にしないといけなかった
石の中のgramと表示で8行ズレてるみたいでそのへんの改良を盛り込んでた
mcuのram使用量やi2cの転送量を減らせたのでまんぞく
3個買ってたけど（このテストする前に）追加3個買ってたから届くの楽しみ
さらにあと3個買えたら買いたいね
ch32fun coroutines
github.com/SrBurns-rep/...
github.com/SrBurns-rep/...
GitHub - SrBurns-rep/ch32fun-coroutines: RISC-V Coroutines for ch32fun
RISC-V Coroutines for ch32fun. Contribute to SrBurns-rep/ch32fun-coroutines development by creating an account on GitHub.
github.com
September 3, 2026 at 9:30 AM
ch32fun coroutines
github.com/SrBurns-rep/...
github.com/SrBurns-rep/...
do you use it with the ch32fun HAL?
August 31, 2026 at 12:39 PM
do you use it with the ch32fun HAL?
UIAPduinoが届いたんで1個試してみるべとMacでセットアップしようとしたら、riscvのツールチェーンのインストールが面倒すぎる。オレはhomebrewじゃなくmacportが使いたいんじゃ〜い（Arduion IDEだけではまったく完結しないのである）
www.uiap.jp/uiapduino/pr...
www.uiap.jp/uiapduino/pr...
UIAPduino Pro Micro CH32V003 V1.4 | UIAP
USB接続のオープンソースCH32V003開発ボードです。Arduino IDEやch32funに対応します。USBホスト保護ヒューズを備えており、CH32V003のHIDデバイスを実証できます。
www.uiap.jp
August 11, 2026 at 7:32 AM
UIAPduinoが届いたんで1個試してみるべとMacでセットアップしようとしたら、riscvのツールチェーンのインストールが面倒すぎる。オレはhomebrewじゃなくmacportが使いたいんじゃ〜い（Arduion IDEだけではまったく完結しないのである）
www.uiap.jp/uiapduino/pr...
www.uiap.jp/uiapduino/pr...
At the same time helped revamp the USBD library of ch32fun! Now it's smaller and 1:1 compatible with the USBFS library, and also supports HID events.
Now USB can be nicely used on ch32v203s without a USBFS PHY.
Currently residing in this pr if anyone wants to try: github.com/cnlohr/ch32f...
Now USB can be nicely used on ch32v203s without a USBFS PHY.
Currently residing in this pr if anyone wants to try: github.com/cnlohr/ch32f...
Update USBD library to match USBFS API & support HID by cheyao · Pull Request #935 · cnlohr/ch32fun
Tested with examples:
bootloader
usbfs_bulk_echo
usbfs_cdc_tty
usbfs_device
usbfs_cdc_ecm (Not 100% sure if I'm accessing the network interface correctly, not a networking guy)
Update:
usbfs...
github.com
August 2, 2026 at 9:50 AM
At the same time helped revamp the USBD library of ch32fun! Now it's smaller and 1:1 compatible with the USBFS library, and also supports HID events.
Now USB can be nicely used on ch32v203s without a USBFS PHY.
Currently residing in this pr if anyone wants to try: github.com/cnlohr/ch32f...
Now USB can be nicely used on ch32v203s without a USBFS PHY.
Currently residing in this pr if anyone wants to try: github.com/cnlohr/ch32f...
CH32V006ボードの詳細はこちらのようです！
https://www.uiap.jp/uiapduino/pro-micro/ch32v006/v1dot1
https://www.uiap.jp/uiapduino/pro-micro/ch32v006/v1dot1
UIAPduino Pro Micro CH32V006 V1.1 | UIAP
USB接続のオープンソースCH32V006開発ボードです。Arduino IDEやch32funに対応します。USBホスト保護ヒューズを備えています。UIAPduino Pro Microの上位モデルです。
www.uiap.jp
April 1, 2026 at 11:44 PM
CH32V006ボードの詳細はこちらのようです！
https://www.uiap.jp/uiapduino/pro-micro/ch32v006/v1dot1
https://www.uiap.jp/uiapduino/pro-micro/ch32v006/v1dot1
Feed: "Adafruit Industries – Makers, hackers, artists, designers and engineers!"
By: Anne Barela on Monday, April 13, 2026
By: Anne Barela on Monday, April 13, 2026
Turning a CH32V003 microcontroller into a tiny monochrome video BASIC machine
V003 Home Computer turns a CH32V003 microcontroller into a tiny monochrome PAL text machine with a built-in line-numbered BASIC interpreter. Video is generated directly by the MCU, and keyboard input can be controlled with the ch32fun single-wire monitor. Using an external crystal oscillator and the PLL gives the best video quality. The internal RC oscillator of the […]
blog.adafruit.com
April 14, 2026 at 8:38 AM
Feed: "Adafruit Industries – Makers, hackers, artists, designers and engineers!"
By: Anne Barela on Monday, April 13, 2026
By: Anne Barela on Monday, April 13, 2026
Feed: "Adafruit Industries – Makers, hackers, artists, designers and engineers!"
By: Anne Barela on Wednesday, March 11, 2026
By: Anne Barela on Wednesday, March 11, 2026
DAPLink (CMSIS-DAP) V1 ported to the CH32V003 microcontroller
The ultra-low cost WCH CH32V003 RISC-V microcontroller is quite attractive to designers of hardware products. BogdanTheGeek on GitHub has posted a fork of DAPLink, DAPLink (CMSIS-DAP) V1 ported to CH32V003 using ch32fun and rv003usb for USB support. It is noted that only SWD is supported. DAPLink (CMSIS-DAP) in general is an open-source firmware project from Arm that acts […]
blog.adafruit.com
March 12, 2026 at 12:31 AM
Feed: "Adafruit Industries – Makers, hackers, artists, designers and engineers!"
By: Anne Barela on Wednesday, March 11, 2026
By: Anne Barela on Wednesday, March 11, 2026