arduino-pico

Raspberry Pi Pico Arduino core, for all RP2040 boards

This is a port of the RP2040 (Raspberry Pi Pico processor) to the Arduino ecosystem.

It uses a custom toolset with GCC 10.2 and Newlib 4.0.0, not depending on system-installed prerequisites. https://github.com/earlephilhower/pico-quick-toolchain

There is automated discovery of boards in bootloader mode, so they show up in the IDE, and the upload command works using the Microsoft UF2 tool (included).

To install:

mkdir -p ~/Arduino/hardware/pico
git clone https://github.com/earlephilhower/arduino-pico.git ~/Arduino/hardware/pico/rp2040
cd ~/Arduino/hardware/pico/rp2040
git submodule init
git submodule update
cd pico-sdk
git submodule init
git submodule update
cd ../tools
python3 ./get.py

The RP2040 PIO state machines (SMs) are used to generate jitter-free:

• Servos
• Tones

Lots of things are working now!

• digitalWrite/Read (basic sanity tested)
• shiftIn/Out (tested using Nokia5110 https://github.com/ionpan/Nokia5110)
• SPI (tested using SdFat 2.0 https://github.com/greiman/SdFat ... note that the Pico voltage regulator can't reliably supply enough power for a SD Card so use external power, and adjust the USE_SIMPLE_LITTLE_ENDIAN define in src/sdfat.h to 0)
• analogWrite/PWM (tested using Fade.ino)
• tone/noTone (using IRQ generated waveform)
• Wire/I2C (tested using DS3231 https://github.com/rodan/ds3231)
• EEPROM (tested examples)
• USB Serial(ACM) w/automatic reboot-to-UF2 upload)
• Hardware UART
• Servo (basic waveform testing, disables/re-enables without any short pulses)

If you want to contribute or have bugfixes, drop me a note at earlephilhower@yahoo.com or open an issue/PR here.

-Earle F. Philhower, III earlephilhower@yahoo.com