This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Arduino UNO R4 Minima

Overview

The Arduino UNO R4 Minima is a development board featuring the Renesas RA4M1 SoC in the Arduino form factor and is compatible with traditional Arduino.

Programming and debugging

Building & Flashing

You can build and flash an application in the usual way (See Building an Application and Run an Application for more details).

Here is an example for building and flashing the Blinky application.

# From the root of the zephyr repository
west build -b arduino_uno_r4_minima samples/basic/blinky
west flash

Debugging

Debugging also can be done in the usual way. The following command is debugging the Blinky application. Also, see the instructions specific to the debug server that you use.

# From the root of the zephyr repository
west build -b arduino_uno_r4_minima samples/basic/blinky
west debug

Using pyOCD

Various debug adapters, including cmsis-dap probes, can debug the Arduino UNO R4 with pyOCD. The default configuration uses the pyOCD for debugging. You must install CMSIS-Pack when flashing or debugging Arduino UNO R4 Minima with pyOCD. If not installed yet, execute the following command to install CMSIS-Pack for Arduino UNO R4.

pyocd pack install r7fa4m1ab

Restoring Arduino Bootloader

If you corrupt the Arduino bootloader, you can restore it with the following command.

wget https://raw.githubusercontent.com/arduino/ArduinoCore-renesas/main/bootloaders/UNO_R4/dfu_minima.hex
pyocd flash -e sector -a 0x0 -t r7fa4m1ab dfu_minima.hex