Just unboxed the #LicheePi4A #RISCV board. Currently installing #NixOS on it. Takes ages, cause there's no binary caches for riscv64-linux and it compiles everything from scratch. Feels a bit like the old Gentoo days 😛

But I can't complain so far. Everything seems to be working, I just have to be patient...

#Kdenlive running on #RISCV

New PCB ready to send for fabrication - a mini CO2 sensor with Sharp Memory LCD, precise RTC and UV/visible sensor too. The PCB is about as small as my KiCad skills and hands can make it - about 40mm wide. "Shoulder buttons" to navigate the UI. Supercapacitor to keep the RTC time for about a week with no power plus LiPo charge management. The heart of it is the #CH32V203 MCU - 144Mhz 32-bit #RISCV with 64K FLASH and 20K SRAM (about 46 cents each).

#QEMU 8.1 Released with New #PipeWire Audio Backend, Multi-Touch Support for the GTK GUI, and Many Improvements for #ARM and #RISCV https://9to5linux.com/qemu-8-1-released-with-new-pipewire-audio-backend-many-improvements

#OpenSource #FreeSoftware #KVM #virtualization

#Linux Weekly Roundup for July 23rd, 2023: #Debian 12.1, #Firefox HW accelerated video playback for #RaspberryPi 4, #Inkscape 1.3, #VirtualBox gets Linux 6.4 and 6.5 support, Debian on #RISCV, and much more https://9to5linux.com/9to5linux-weekly-roundup-july-23rd-2023

#OpenSource #FOSS

#Debian GNU/Linux Is Now Officially Supported on the #RISCV Hardware Architecture https://9to5linux.com/debian-gnu-linux-is-now-officially-supported-on-the-risc-v-architecture

#OpenSource

Created a new KiCad symbol today for the QFN20 version of the CH32V003. I wish it had more FLASH+RAM, but it's still useful for some relatively small, simple (and inexpensive) MCU projects.

#kicad
#RISCV

I assembled the first version of my CH32V203 Pocket CO2 Sensor project today. The Sharp LCD and most of the board works, but I forgot pull-up resistors on the RTC and it doesn't appreciate that. An ugly patch and I got things working; not too bad for a v1 board. The LiPo charging / LDO all work fine. I didn't solder the LSM6DS3 in case of an error and I was right to do that :)

#RISCV
#CH32V
#CO2

#Armbian 23.05 Released with #Debian 12 “Bookworm”-Based Images, Official i3 Support, and Updated #Ubuntu-Based Images https://9to5linux.com/armbian-23-05-releases-with-debian-12-bookworm-based-images-i3-support

#OpenSource #ARM #RISCV

CH32V Arduino support just released...

https://github.com/openwch/arduino_core_ch32

#RISCV
#CH32V

The #RISCV #CH32V203 version of my Pocket CO2 sensor is coming along. The schematic is nearly complete and I hope to order my first PCBs this weekend. Lots of sensors and soldering challenges. The parts so far:
- CH32V203F8P6 (64K FLASH / 20K SRAM, 144Mhz)
- SCD4x CO2 sensor
- LSM6DS3 6DOF IMU
- LTR-390 UV/Visible light sensor
- RV-3032-C7 low power RTC
- 3x high power white LEDs (flashlight)
- TP4057 battery charge controller
- 128x128 Sharp Memory LCD
- 2x push buttons
- 2x status LEDs

I didn't get USB working on the CH32V203, but I did get my bit bang I2C code working. The consolidation of functions in the TSSOP20 package are pretty terrible. SWDIO, USB and I2C are all on pins 1&2.
#RISCV

A video walk-through of my Pocket CO2 project. It's hard to gauge the scale and features from still images:

https://www.youtube.com/watch?v=Kik7NmzLE-k

#CO2
#scd40
#RISCV

#QEMU 8.0 Machine Emulation Software Is Out with New #ARM and #RISCV Features, Various Improvements https://9to5linux.com/qemu-8-0-virtualization-software-released-with-new-arm-and-risc-v-features

#OpenSource #FreeSoftware #virtualization

#Linux Weekly Roundup for April 9th, 2023: New #BlackArch Linux release, new Linux #gaming laptop from TUXEDO Computers, new #RISCV SBC from PINE64, new Tux Paint and OpenShot releases, new #KDE goodies, and much more https://9to5linux.com/9to5linux-weekly-roundup-april-9th-2023

#OpenSource #FOSS

You Can Now Buy the #Star64 #RISCV Single-Board Computer from #PINE64 https://9to5linux.com/star64-is-now-available-to-order-as-pine64s-first-risc-v-sbc

@PINE64 #Linux #OpenSource

Join Harish Pillay @harishpillay's session on "RISC-V: Most of everything that you wanted to know but did not know to ask" at #FOSSASIA Summit 2023 #Singapore 13-15 April #opensource #hardware #chip #riscv https://eventyay.com/e/7cfe0771/session/8167

Join Harish Pillay @harishpillay's session on "RISC-V: Most of everything that you wanted to know but did not know to ask" at #FOSSASIA Summit 2023 #Singapore 13-15 April #opensource #hardware #chip #riscv https://eventyay.com/e/7cfe0771/session/8167

#Ubuntu Now Officially Supports the World's First RISC-V Based SoC FPGA, the PolarFire SoC FPGA Icicle Kit Board from Microchip Technologies https://9to5linux.com/ubuntu-now-officially-supports-microchips-polarfire-soc-fpga-icicle-kit-risc-v-board

@ubuntu #Linux #OpenSource #RISCV

Is anyone else experimenting with the WCH CH32V line of RISC-V MCUs? My latest project is an improved pocket CO2 detector with a BOM cost of < $17.
#RISCV