.. _rcar_h3_salvatorx_boards:

Renesas R-Car H3 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.

.. figure:: img/rcar_h3_salvatorx.jpg
   :align: center
   :alt: R-Car Salvator-X kit

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

Hardware
********

Hardware capabilities for the H3 Salvator-X for can be found on the `eLinux H3 Salvator-X page`_
of the board.

.. figure:: img/rcar_h3_features.jpg
   :align: center
   :alt: R-Car Salvator-X features

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

More information about the SoC that equips the board can be found here:

- `Renesas R-Car H3 chip`_

Supported Features
==================

Here is the current supported features when running Zephyr Project on the R-Car Salvator-X CR7:

+-----------+------------------------------+--------------------------------+
| Interface | Driver/components            | Support level                  |
+===========+==============================+================================+
| PINCTRL   | pinctrl                      |                                |
+-----------+------------------------------+--------------------------------+
| CLOCK     | clock_control                |                                |
+-----------+------------------------------+--------------------------------+
| GPIO      | gpio                         |                                |
+-----------+------------------------------+--------------------------------+
| UART      | uart                         | serial port-polling            |
+           +                              +                                +
|           | FT232RQ / CP2102             | serial port-interrupt          |
+-----------+------------------------------+--------------------------------+
| CAN       | can                          | normal mode                    |
+           +                              +                                +
|           | TCAN332GDCNT                 | loopback mode                  |
+-----------+------------------------------+--------------------------------+
| I2C       | i2c                          | interrupt driven               |
+-----------+------------------------------+--------------------------------+

It's also currently possible to write on the ram console.

Connections and IOs
===================

.. figure:: img/r-car-h3-salvator-x-connections.jpg
   :align: center
   :alt: 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
*************************

Build and flash applications as usual (see :ref:`build_an_application` and
:ref:`application_run` 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_h3_salvatorx_cr7`` board configuration can be built
in the usual way (see :ref:`build_an_application` for more details).

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: rcar_h3_salvatorx_cr7
   :goals: flash

You should see the following message in the terminal:

.. code-block:: console

	*** Booting Zephyr OS build v2.6.0-rc1 ***
	Hello World! rcar_h3_salvatorx_cr7

Debugging
=========

First of all, open your serial terminal.

Here is an example for the :ref:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: rcar_h3_salvatorx_cr7
   :goals: 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:

.. code-block:: console

	*** Booting Zephyr OS build v2.6.0-rc1 ***
	Hello World! rcar_h3_salvatorx_cr7

References
**********

- `Renesas R-Car H3 chip`_
- `Renesas R-Car Development Support website`_
- `eLinux H3 Salvator-X page`_

.. _Renesas R-Car H3 chip:
	https://www.renesas.com/eu/en/products/automotive-products/automotive-system-chips-socs/r-car-h3-high-end-automotive-system-chip-soc-vehicle-infotainment-and-driving-safety-support

.. _Renesas R-Car Development Support website:
   https://www.renesas.com/us/en/support/partners/r-car-consortium/r-car-development-support

.. _eLinux H3 Salvator-X page:
	https://elinux.org/R-Car/Boards/Salvator-X

.. _Install a toolchain:
	https://docs.zephyrproject.org/latest/getting_started/index.html#install-a-toolchain