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	In-progress contribution to Zephyr main repo WIP branch available, detail information are described in the next part RSK-RX130 Zephyr documentation	RSK-RX130-512KB Sample and Demo hardware configuration
QEMU RX	In-progress contribution to Zephyr main repo WIP branch available, detail information are described in the next part QEMU RX 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