Renesas RX Zephyr Support - renesas/zephyr GitHub Wiki

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

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 #90708 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 #90708 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 RSK-RX130 Zephyr documentation	RSK-RX130-512KB Sample and Demo hardware configuration
QEMU RX	Available on Zephyr main repository QEMU 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
MTU	PWM	Available	RSK-RX130
RI2C	I2C	Available	RSK-RX130
RSPI	SPI	Available	RSK-RX130
ADC	ADC	In-progress review in upstream Zephyr repo #90203 Available in WIP branch	RSK-RX130
Flash controller	Flash	In-progress review in upstream repo #89637 Available in WIP branch	RSK-RX130
WDT	Watchdog	In-progress review in upstream repo #89914 Available in WIP branch	RSK-RX130
DTC	-	Available in WIP branch	RSK-RX130
LVD	-	Available in WIP branch	RSK-RX130
LPC	-	Available in WIP branch	RSK-RX130

Build and Flash guideline

For required tool and environment setup to develop Zephyr, please check: 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