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boards: renesas: Add support for Renesas ek_ra4c1 board
Add support for Renesas ek_ra4c1 board Signed-off-by: Khoa Nguyen <[email protected]>
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‎boards/renesas/ek_ra4c1/Kconfig.ek_ra4c1

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# Copyright (c) 2025 Renesas Electronics Corporation
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_EK_RA4C1
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select SOC_R7FA4C1BD3CFP

‎boards/renesas/ek_ra4c1/board.cmake

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# Copyright (c) 2025 Renesas Electronics Corporation
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# SPDX-License-Identifier: Apache-2.0
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board_runner_args(jlink "--device=R7FA4C1BD")
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board_runner_args(pyocd "--target=R7FA4C1BD")
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include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
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include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

‎boards/renesas/ek_ra4c1/board.yml

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board:
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name: ek_ra4c1
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full_name: RA4C1 Evaluation Kit
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vendor: renesas
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socs:
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- name: r7fa4c1bd3cfp

‎boards/renesas/ek_ra4c1/doc/ek_ra4c1.webp

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‎boards/renesas/ek_ra4c1/doc/index.rst

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.. zephyr:board:: ek_ra4c1
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Overview
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********
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The EK-RA4C1, an Evaluation Kit for the RA4 Series, enables users to seamlessly evaluate
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the features of the RA4C1 MCU group and develop embedded systems applications using
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Flexible Software Package (FSP). The users can use rich on-board features along with
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their choice of popular ecosystems add-ons to bring their big ideas to life.
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The key features of the EK-RA4C1 board are categorized in three groups (consistent with
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the architecture of the kit) as follows:
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**Renesas RA4C1 Microcontroller Group**
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- R7FA4C1BD3CFP MCU (referred to as RA MCU)
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- 80 MHz, Arm® Cortex®-M33 core
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- 512 KB Code Flash, 96 KB SRAM
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- 100 pins, LQFP package
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- Native pin access through 3 x 26-pin headers (not populated)
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- Tamper Detection embedded into J4
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- Segment LCD Board Interface
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- MCU current measurement points for precision current consumption measurement
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- Multiple clock sources – RA MCU oscillator and sub-clock oscillator crystals,
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providing precision 8.000 MHz and 32,768 Hz reference clocks. Additional low-precision
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clocks are available internal to the RA MCU
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**System Control and Ecosystem Access**
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- Two 5 V input sources
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- USB (Debug)
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- External Power Supply 2-pin header (not populated)
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- Three Debug modes
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- Debug on-board (SWD)
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- Debug in (SWD)
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- Debug out (SWD, SWO and JTAG)
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- User LEDs and buttons
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- Three User LEDs (red, blue, green)
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- Power LED (white) indicating availability of regulated power
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- Debug LED (yellow) indicating the debug connection
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- Two User buttons
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- One Reset button
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- Five most popular ecosystems expansions
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- Two Seeed Grove® system (I2C/Analog) connectors (not populated)
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- SparkFun® Qwiic® connector (not populated)
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- Two Digilent PmodTM (SPI, UART and I2C) connectors
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- Arduino™ (UNO R3) connector
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- MikroElektronikaTM mikroBUS connector (not populated)
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- MCU boot configuration jumper
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- Low Voltage Mode voltage input and operation
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**Special Feature Access**
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- 32 MB (256 Mb) External Quad-SPI Flash
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- CAN-FD (3-pin header)
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- External Battery Connector
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- Configuration Switch
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Hardware
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********
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Detailed hardware features can be found at:
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- RA4C1 MCU: `RA4C1 Group User's Manual Hardware`_
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- EK-RA4C1 board: `EK-RA4C1 - User's Manual`_
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Supported Features
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==================
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.. zephyr:board-supported-hw::
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Programming and Debugging
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*************************
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Applications for the ``ek_ra4c1`` board can be built, flashed, and debugged in the usual way.
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See :ref:`build_an_application` and :ref:`application_run` for more details on
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building and running.
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Flashing
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========
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Program can be flashed to EK-RA4C1 via the on-board SEGGER J-Link debugger.
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SEGGER J-link's drivers are avaialbe at https://www.segger.com/downloads/jlink/
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To flash the program to board
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1. Connect to J-Link OB via USB port to host PC
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2. Make sure J-Link OB jumper is in default configuration as describe in `EK-RA4C1 - User's Manual`_
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Note: SW4-4 needs to be set to OFF
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3. Execute west command
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.. code-block:: console
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west flash -r jlink
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References
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**********
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- `EK-RA4C1 Website`_
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- `RA4C1 MCU group Website`_
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.. _EK-RA4C1 Website:
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https://www.renesas.com/en/design-resources/boards-kits/ek-ra4c1
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.. _RA4C1 MCU group Website:
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https://www.renesas.com/en/products/ra4c1
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.. _EK-RA4C1 - User's Manual:
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https://www.renesas.com/en/document/mat/ek-ra4c1-users-manual
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.. _RA4C1 Group User's Manual Hardware:
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https://www.renesas.com/en/document/mah/ra4c1-group-users-manual-hardware

‎boards/renesas/ek_ra4c1/ek_ra4c1-pinctrl.dtsi

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/*
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* Copyright (c) 2025 Renesas Electronics Corporation
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* SPDX-License-Identifier: Apache-2.0
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*/
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&pinctrl {
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sci4_default: sci4_default {
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group1 {
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/* tx rx */
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psels = <RA_PSEL(RA_PSEL_SCI_0, 2, 7)>,
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<RA_PSEL(RA_PSEL_SCI_0, 2, 6)>;
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};
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};
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spi0_default: spi0_default {
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group1 {
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/* MISO MOSI RSPCK SSL */
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psels = <RA_PSEL(RA_PSEL_SPI, 1, 10)>,
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<RA_PSEL(RA_PSEL_SPI, 1, 9)>,
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<RA_PSEL(RA_PSEL_SPI, 1, 11)>,
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<RA_PSEL(RA_PSEL_SPI, 1, 12)>;
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};
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};
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adc0_default: adc0_default {
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group1 {
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/* input */
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psels = <RA_PSEL(RA_PSEL_ADC, 0, 2)>;
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renesas,analog-enable;
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};
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};
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pwm4_default: pwm4_default {
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group1 {
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/* GTIOC4A GTIOC4B */
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psels = <RA_PSEL(RA_PSEL_GPT1, 3, 2)>,
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<RA_PSEL(RA_PSEL_GPT1, 3, 1)>;
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};
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};
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iic1_default: iic1_default {
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group1 {
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/* SCL1 SDA1 */
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psels = <RA_PSEL(RA_PSEL_I2C, 4, 0)>,
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<RA_PSEL(RA_PSEL_I2C, 4, 1)>;
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drive-strength = "medium";
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};
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};
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canfd0_default: canfd0_default {
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group1 {
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/* CRX0 CTX0 */
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psels = <RA_PSEL(RA_PSEL_CANFD, 1, 3)>,
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<RA_PSEL(RA_PSEL_CANFD, 1, 2)>;
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drive-strength = "high";
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};
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};
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};

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