ET171 Development Board

Overview

The et171 development board is used for development and verification, and can be used for application development through interfaces such as UART, GPIO, SPI, and I2C.

Hardware

The platform provides following hardware components:

  • 32-bit RISC-V CPU

  • 384KB embedded SDRAM

  • UART

  • I2C

  • SPI

  • GPIO

  • PWM

  • DMA

  • USB

Supported Features

The egis_et171 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.

Connections and IOs

The et171 platform has 1 GPIO controller. It is providing 17 bits of IO. It is responsible for pin input/output, pull-up, etc.

The et171 platform has 3 SPI controllers, 2 of which can additionally support QSPI and XIP mode.

The et171 platform has one USB 2.0 controller that supports up to USB 2.0 high-speed mode.

Except USB DP/DM, all et171 peripheral I/O devices are mapped to 31 I/O pins through the multiplexer controller.

System Clock

The et171 platform has a multi-stage frequency divider with a maximum speed of 200 MHz.

Programming and debugging

The egis_et171 board supports the runners and associated west commands listed below.

flash debug

The et171 is compatible with Andes ae350, so you can use Andes ICE for debugging. For debugging zephyr applications or upload them into a RAM, you will need to connect ICE from host computer to et171 board and execute the ICE management software, ICEman, on this host computer.

Connecting Andes ICE (AICE)

AICE is used for debugging and uploading RAM code to the board.

Building

You can build applications in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b egis_et171 samples/hello_world

Flashing

Since this is a B2B prototype, there is no publicly available flashing tool. If you have any development needs, please contact the contact window of Egis Technology Inc. .

If you has a debugger (AICE-MICRO [1]) with ICEman (Andes Development Kit [2]) , set the CONFIG_XIP=n to enable running the program in RAM mode via the ICE debugger.

At first, you should run ICEman before load program.

# Enable execute file permission of ICEman
$ chmod a+x ./ICEman

# Running the ICEman server
$ sudo ./ICEman -Z v5

# When your ICEman server is running
# You can load the program into RAM and execute it via gdb
$ riscv64-zephyr-elf-gdb build/zephyr/zephyr.elf
(gdb) target remote :1111
(gdb) monitor reset halt
(gdb) load
(gdb) quit

References