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Testing Luckfox Pico RISC-V boards.

Pico board Pinout

Cross-compiling with cmake

Following instructions in https://wiki.luckfox.com/Luckfox-Pico/Core3566-SDK/, using docker image luckfoxtech/luckfox_pico:1.0 with the SDK mounted in the container in /home.

Cross-compiling and running a hello world application

Tests programs

See examples in test_programs folder.

Compiled binaries published in gitlab actions jobs.

RV1103

PWM

Resolution

Even if the unit is a nanosecond, apparently the minimum resolution of the provided firmware kernel (Linux luckfox 5.10.110) is 10ns: testing PWM resolution on RV1103

Jitter

It seems to have a jitter of ~5-10ns: testing PWM jitter on RV1103

Stability

There are gaps up to ~70us on the PWM output when using small duty cycles (~10ns): testing PWM stability on RV1103

This does not seem to happen when increasing the duty cycle to >20ns.

UART

UART TX testing