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Overview

boards/ite/it51xxx_evb/doc/index.rst

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.. zephyr:board:: it51xxx_evb

Overview

The IT51XXX is a 32-bit RISC-V microcontroller. And a highly integrated embedded controller with system functions. It is suitable for mobile system applications. The picture below is the IT51526 development board (also known as it51xxx_evb/it51526aw) and its debug card.

.. figure:: it51xxx_evb_and_debug_card.webp :align: center :alt: IT51526 EVB

To find out more about ITE, visit our World Wide Web at:ITE's website_

Hardware

The IT51XXX series contains different chip types(ex, it51526, it51527), and they support different hardware features. Listing the IT51526 hardware features as following:

  • RISC-V RV32IMC instruction set
  • 4KB instruction cache size
  • 128KB SRAM in total
  • Built-in 32.768 kHz clock generator
  • Embedded Flash, 512K/1024K-byte e-flash
  • eSPI, SPI, BRAM, KBC, PECI, UART
  • GPIO, PWM, ADC, INTC, WUC, Timer, Watchdog, KB scan, JTAG
  • Support 3 Voltage Comparator
  • Support Cryptographic Engine
  • 9 SMBus hosts, 3 targets, with 12 SMBus channels, compatible with I2C
  • I3C host: Support two I3C controllers, compliant with the MIPI I3C v1.0 SEPC.
  • Two-wire serial interface up to 12.5MHz using Push-Pull.
  • Support SDR, IBI, Hot-Join.
  • I3C target: Support SDR, FIFO co-use DLM. Support Push-Pull output.

Supported Features

.. zephyr:board-supported-hw::

Programming and debugging on it51526

In order to upload the application to the device, you'll need our flash tool and Download board. You can get them at: ITE's website_.

Wiring

#. Connect the Download Board to your host computer using the USB cable.

#. Connect the it51xxx_evb to the evolution motherboard.

#. Connect the Download Board J5 to J38(GPC1 & GPC2) on the evolution motherboard.

#. Connect the USB to UART wire to UART0 connector on the evolution motherboard.

.. image:: it51xxx_evb_wiring.webp :align: center :alt: it51xxx_evb wiring

.. note:: Be careful during connection! Use separate wires to connect I2C pins with pins on the it51xxx_evb board. Wiring connection is described in the table below.

+-------------+---------------+
|   J5        | it51xxx_evb   |
|   Connector | J38 Connector |
+=============+===============+
|      2      |      C1       |
+-------------+---------------+
|      3      |      C2       |
+-------------+---------------+
|      4      |      GND      |
+-------------+---------------+

For USB to UART cable, connect the evolution motherboard as below:

+-------------+---------------+
| USB to UART | Evolution     |
| cable       | motherboard   |
|             | UART0         |
|             | Connector     |
+=============+===============+
|     USB     |     UART0     |
+-------------+---------------+

Building

#. Build :zephyr:code-sample:hello_world application as you would normally do (see :Zephyr Getting Started Guide_):.

.. zephyr-app-commands:: :board: it51xxx_evb/it51526aw :zephyr-app: samples/hello_world :goals: build

#. The file :file:zephyr.bin will be created by west.

Flashing

Windows

Use the winflash tool to program a zephyr application to the it51xxx/it51526aw board flash.

#. Flashing steps as described in the link: Flashing steps_.

#. Turn on the it51xxx_evb/it51526aw board switch, you should see "Hello World! it51xxx_evb/it51526aw" sent by the board. If you don't see this message, press the Reset button and the message should appear.

Ubuntu

#. Run your favorite terminal program to listen for output. Under Linux the terminal should be :code:/dev/ttyUSB0. Do not close it.

For example:

.. code-block:: console

  $ minicom -D /dev/ttyUSB0 -b 115200

#. Open a second terminal window and use the Linux flash tool to flash your board.

.. code-block:: console

  $ sudo ~/itetool/ite -f build/zephyr/zephyr.bin

.. note:: The source code of ITE tool can be downloaded here: https://www.ite.com.tw/upload/2024_01_23/6_20240123162336wu55j1Rjm4.bz2

#. Split first and second terminal windows to view both of them. You should see "Hello World! it51xxx_evb/it51526aw" in the first terminal window. If you don't see this message, press the Reset button and the message should appear.

Debugging

it51xxx_evb board can be debugged by connecting USB to UART. We can write commands and read messages through minicom in the Ubuntu terminal.

Troubleshooting

#. If the flash tool reports a failure, re-plug the 8390 Download board or power cycle the it51xxx_evb board and try again.

References

.. target-notes::

.. _ITE's website: https://www.ite.com.tw/en .. _Zephyr Getting Started Guide: https://docs.zephyrproject.org/latest/getting_started/index.html .. _Flashing steps: https://docs.zephyrproject.org/latest/boards/ite/it82xx2_evb/doc/index.html#flashing