R-Car Salvator-X

Overview

  • The H3 Salvator-X board is designed for evaluating the features and performance of the R-CAR H3 device from Renesas Electronics and it is also used for developing and evaluating application software for these R-CAR H3.

  • The H3 Salvator-X, based on the R-CAR H3 SIP, comes with LPDDR4 @4GB in 2-channel, each 64-bit wide+Hyperflash @64MB, CSI2 interfaces and several communication interfaces like USB, Ethernet, HDMI and can work standalone or can be adapted to other boards, via 440pin connector on bottom side.

More information about the H3 SoC can be found here: Renesas R-Car H3 chip

Hardware

Hardware capabilities for the H3 Salvator-X for can be found on the eLinux H3 Salvator-X page.

Note

Zephyr will be booted on the CR7 processor provided for RTOS purpose.

More information about the board can be found at Renesas R-Car Development Support website.

Supported Features

The rcar_salvator_x board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
rcar_salvator_x
/
r8a77951/r7

Type

Location

Description

Compatible

CPU

on-chip

ARM Cortex-R7 CPU1

arm,cortex-r7

CAN

on-chip

Renesas R-Car CAN controller1

renesas,rcar-can

Clock control

on-chip

Renesas R8A7795 SoC Clock Pulse Generator / Module Standby and Software Reset1

renesas,r8a7795-cpg-mssr

GPIO & Headers

on-chip

Renesas RCAR GPIO1 1

renesas,rcar-gpio

I2C

on-chip

Renesas R-Car I2C controller2

renesas,rcar-i2c

Input

on-board

Group of GPIO-bound input keys1

gpio-keys

Interrupt controller

on-chip

ARM Generic Interrupt Controller v21

arm,gic-v2

LED

on-board

Group of GPIO-controlled LEDs1

gpio-leds

Pin control

on-chip

Renesas R-Car Pin Function Controller1

renesas,rcar-pfc

PWM

on-chip

Renesas R-Car PWM controller1

renesas,pwm-rcar

Serial controller

on-chip

Renesas R-Car UART controller1 1

renesas,rcar-scif

SRAM

on-chip

Generic on-chip SRAM1

mmio-sram

Timer

on-chip

Renesas R-Car CMT timer1

renesas,rcar-cmt

Note

It is recommended to disable peripherals used by the R7 core on the Linux host.

Connections and IOs

R-Car Salvator-X connections

GPIO

By running Zephyr on H3 Salvator-X, the software readable push buttons ‘SW20’, ‘SW21’, ‘SW22’ can be used as input, and the software contollable LEDs ‘LED4’, ‘LED5’, ‘LED6’ can be used as output.

UART

Salvator-X board is providing two serial ports:

  • one is for A53/A57 processors

  • the other one is for CR7

Both ports are converted to USB through CP2102 converters and they are exposed as follows:

Connector

Processor

CN25

A53/A57

CN26

CR7

Programming and Debugging

The rcar_salvator_x board supports the runners and associated west commands listed below.

flash debug attach rtt debugserver
openocd ✅ (default) ✅ (default) ✅ ✅ ✅

Build and flash applications as usual (see Building an Application and Run an Application for more details).

Supported Debug Probe

The “Olimex ARM-USB-OCD-H” probe is the only officially supported probe. This probe is supported by OpenOCD that is shipped with the Zephyr SDK.

The “Olimex ARM-USB-OCD-H” probe needs to be connected to CN1 on Salvator-X.

Configuring a Console

Connect a USB cable from your PC to CN25 and/or CN26 then use the following settings with your serial terminal of choice (minicom, putty, etc.):

  • Speed: 115200

  • Data: 8 bits

  • Parity: None

  • Stop bits: 1

Flashing

First of all, open your serial terminal.

Applications for the rcar_salvator_x board configuration can be built in the usual way (see Building an Application for more details).

# From the root of the zephyr repository
west build -b rcar_salvator_x samples/hello_world
west flash

You should see the following message in the terminal:

*** Booting Zephyr OS build v2.6.0-rc1 ***
Hello World! rcar_salvator_x

Debugging

First of all, open your serial terminal.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b rcar_salvator_x samples/hello_world
west debug

You will then get access to a GDB session for debug.

By continuing the app, you should see the following message in the terminal:

*** Booting Zephyr OS build v2.6.0-rc1 ***
Hello World! rcar_salvator_x

References