Pico RISC-V Debugger

Turn your RP2040 into ch32v003 flasher/debugger. Based on project aappleby/picorvd (see links below).

Requirements

• pico-sdk
• PICO_SDK_PATH environment variable
• FreeRTOS Kernel

git clone https://github.com/FreeRTOS/FreeRTOS-Kernel --recurse-submodules

• FREERTOS_KERNEL_PATH environment variable (optional)

Getting started

0. Connect pin PD1 on your CH32V device to the Pico's SWIO pin (defaults to pin GP5), connect CH32V ground to Pico ground, and add a 1Kohm pull-up resistor from SWIO to +3.3v.

1. Build debugger.

mkdir build
(cd build && cmake .. && make pico_rvd)

2. Flash it to pico.

Copy build/pico_rvd.uf2 to RPI-RP2

or run command

(cd build && make pico_rvd---deploy)

Steps 1 and 2 required only once.

3. Build ch32v003 blink example and flash it.

(cd examples/blink && make)

Console

Pico detects as two ttyACMx devices. First one is debugger console. Connect via

minicom -D /dev/ttyACM0

or

tio /dev/ttyACM0

and type "help" to get list of commands.

Links

• https://github.com/aappleby/picorvd
• https://github.com/cnlohr/ch32v003fun