EK-RX261
The Renesas EK-RX261 evaluation kit (RTK5EK2610S00001BE) with an R5F52618BGFP: an RX261 MCU (RXv3 core, single-precision FPU, 64 MHz, 512 KiB code flash, 128 KiB RAM). It is LabWired's first Renesas RX part.
LabWired runs it on its RX core (the RXv3 instruction set with the ICU in the
core), with SCI6 as the console, CMT0-3 and the SYSTEM/FLASH start-up
handshakes. Unmodified upstream Zephyr v4.3.0 images for ek_rx261 start
at the fixed reset vector:
| Script | Firmware | Result |
|---|---|---|
zephyr-hello.yaml |
samples/hello_world |
banner + Hello World! ek_rx261/r5f52618bgfp on SCI6 |
zephyr-sync.yaml |
samples/synchronization |
thread_a / thread_b alternate on CMT0 tick interrupts |
zephyr-kernel-common.yaml |
tests/kernel/common |
12 suites, 61 pass + 1 skip (atomics, irq_offload, clock, …) |
zephyr-uart-basic-api.yaml |
tests/drivers/uart/uart_basic_api |
7/7 on the interrupt-driven SCI driver (RXI6/TXI6/TEI6 ICU vectors) |
Not claimed yet
PORT/MPC pin control (no LEDs or switches), SCI6 ERI (receive-error interrupt), DTC, group interrupts, IRQ pins, the RXv3 register banks, user-mode privilege checks and FPU exceptions. SIM-DERIVED: no bench part.
Evidence and the full claim table: examples/ek-rx261/VALIDATION.md.
Rebuild the fixtures: crates/firmware-ek-rx261-zephyr/build.sh.