pico

MultiBus for Raspberry Pi Pico[W]

Compile and install

• Clone PICO SDK from GitHub git clone https://github.com/raspberrypi/pico-sdk.git
• Set PICO_SDK_PATH: export PICO_SDK_PATH=/path/to/pico-sdk
• Clone MultiBus from GitHub git clone https://github.com/mringwal/multibus.git`
• Go to pico firmware folder cd multibus/firmware/pico
• Create build directory mkdir build && cd build
• Configure build cmake ..
• Build make
• Enter Pico Bootloader mode:
  • Unplug Pico
  • Hold BOOTSEL button while plugging USB cable in
  • Pico should show up as Mass Storage Device in your OS
• Flash firmware cp multibus-pico.uf2 /path/to/pico/MassStorageDevice
• Berify that a new virtual serial port has become available

Test

• Go to multibus/example/python/
• Run bridge_info.py python3 bridge_info.py path-to-pico-usb-cdc-serial-port

Hardware Info

The RP2040 has 2 I2C and 2 SPI Instances. For both, instance 0 is used in master mode.

GPIO	Function
4	I2C0-SDA
5	I2C0-SCL
18	SPI0-SCK
19	SPI0-MOSI
16	SPI0-MISO
17	SPI0-CSN