Renesas RX Zephyr Support

The following content in this page describe current Zephyr support status for Renesas RX MCU family, for detail about RX MCU, please visit RX 32-Bit Performance / Efficiency MCUs

Table of contents

• List of supported RX devices on Zephyr
• HWIP support status
• Build and Flash guideline
• WIP integration branch information

List of supported RX devices on Zephyr

Device name	Status	Samples and demo Hardware connection
EK-RX261	In-progress contribution to Zephyr main repo WIP branch available, detail information are described in the next part	EK-RX261 Sample and Demo hardware configuration
FPB-RX261	In-progress contribution to Zephyr main repo WIP branch available, detail information are described in the next part	FPB-RX261 Sample and Demo hardware configuration
RSK-RX130	Available on Zephyr main repository EK-RA8M1 Zephyr documentation	RSK-RX130-512KB Sample and Demo hardware configuration
QEMU RX	Available on Zephyr main repository EK-RA8M1 Zephyr documentation

HWIP support status

Renesas HW IP	Mapping to Zephyr	Status	Board
I/O Ports	GPIO	Available	RSK-RX130
SCI (UART)	UART	Available	QEMU RX
CGC	Clock control	Available	All available devices
CMT	System Timer	Available	RSK-RX130, QEMU RX

Build and Flash guideline

For required tool and environment setup to develop Zephyr, please check: https://github.com/duynguyenxa/Test/wiki/Getting-started-guide

Currently RX arch hasn't support on Zephyr SDK yet, so we need to setup GCC RX toolchain as "cross-compile" on Zephyr build system For reference, please visit https://docs.zephyrproject.org/latest/develop/toolchains/other_x_compilers.html

Following step are required for build and flashing Zephyr binary image to RX board

Software preparation:

• Download and install GCC RX toolchain for https://llvm-gcc-renesas.com/rx-download-toolchains/
• Download and install SEGGER Jlink: https://www.segger.com/downloads/jlink/

NOTE: Please make sure that the installed software are added into environment PATH

Build environment setup:

• Set Zephyr toolchain variant to cross compile: $ export ZEPHYR_TOOLCHAIN_VARIANT=cross-compile

• Export toolchain PATH for Zephyr build system: $ export CROSS_COMPILE=<path/to/your/bin/rx-elf-

  e.g

  $ export CROSS_COMPILE=/opt/toolchains/gcc_8.3.0.202411_rx_elf/bin/rx-elf-

Build command: $ west build -b rsk_rx130@512kb -p always samples/basic/blinky

Flash command: $ west flash

WIP integration branch information

Branch name	Information
upstream/rx_zephyr_support_PR1.1	Upstream branch, basic support for RX architecture: + Support for Renesas RX architecture on Zephyr + RX130 SoC and RSKRX130 board support for RX SoC + Serial interface driver support (SCI UART) + Pinctrl driver support for RX SoC + GPIO driver support for RX SoC + Clock control driver support for RX SoC
wip/rx_support_alpha1.2	New feature update for RSKRX130 board: + Add 64-bit system timer feature + Add tickless capable system timer + Support I2C driver (Master mode) for RX130 MCU + Support SPI driver for RX130 MCU + Support PWM driver for RX130 MCU + Add support external interrupt configuration feature for GPIO for RX130 MCU
wip/rx_support_1.3	New feature update for RSKRX130 board: + Change build system to use "cross-compile" + Change board define for RSK-RX130 boards, now it's using board revision + Add support for power management on RX130 + Add driver support for DTC (Data transfer control) on UART, I2C, SPI driver on RX130 + Add support for Device power management on UART, I2C, SPI driver + Add driver support for 12-bit ADC on RX130 + Add driver support for flash controller on RX130 + Add driver support for IWDT (watchdog) on RX130 + Add driver support for LVD on RX130 + Add driver support for CTSU (captive touch) on RX130