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99 lines
4.7 KiB
Markdown
99 lines
4.7 KiB
Markdown
<!--
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Copyright (C) 2018 Gunar Schorcht
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Copyright (C) 2020 Google LLC
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This file is subject to the terms and conditions of the GNU Lesser
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General Public License v2.1. See the file LICENSE in the top level
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directory for more details.
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-->
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@defgroup boards_esp32_esp-ethernet-kit-v1_2 ESP32-Ethernet-Kit V1.2 Board
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@ingroup boards_esp32_esp-ethernet-kit
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@brief Support for for Espressif ESP32-Ethernet-Kit V1.2
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@author Gunar Schorcht <gunar@schorcht.net>
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@author Erik Ekman <eekman@google.com>
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\section esp32-ethernet-kit-v1_2 Espressif ESP32-Ethernet-Kit v1.2
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## Table of Contents {#esp32_ethernet_kit_v1_2_toc}
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1. [Overview](#esp32_ethernet_kit_v1_2_overview)
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2. [Hardware](#esp32_ethernet_kit_v1_2_hardware)
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1. [Board Configuration](#esp32_ethernet_kit_v1_2_board_configuration)
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2. [Board Pinout](#esp32_ethernet_kit_v1_2_pinout)
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3. [Other Documentation Resources](#esp32_ethernet_kit_v1_2_other-resources)
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## Overview {#esp32_ethernet_kit_v1_2_overview}
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The Espressif [ESP32-Ethernet-Kit](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-ethernet-kit.html) is a development board that uses the ESP32-WROVER-E module. Most important features of the board are
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- 100 Mbps Ethernet via IP101G PHY
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- USB bridge with JTAG interface
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Furthermore, some GPIOs are broken out for extension. The USB bridge based on FDI FT2232HL provides a JTAG interface for OCD debugging through the USB interface.
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For flashing and debugging the board, see \ref boards_esp32_esp-ethernet-kit common board documentation.
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@image html "https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32/_images/esp32-ethernet-kit-v1.2.jpg" "ESP32-Ethernet-Kit V1.2" width=500
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[Back to table of contents](#esp32_ethernet_kit_v1_2_toc)
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## Hardware {#esp32_ethernet_kit_v1_2_hardware}
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This section describes
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- the default [board configuration](#esp32_ethernet_kit_v1_2_board_configuration),
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- the [board pinout](#esp32_ethernet_kit_v1_2_pinout).
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[Back to table of contents](#esp32_ethernet_kit_v1_2_toc)
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### Board Configuration {#esp32_ethernet_kit_v1_2_board_configuration}
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ESP32-Ethernet-Kit v1.2 has the following on-board components
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- 100 Mbps Ethernet via IP101G PHY
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- USB bridge with JTAG interface
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For detailed information about the configuration of ESP32 boards, see
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section Peripherals in \ref esp32_riot.
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@note
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Only a few GPIOs are broken out and available for external hardware on ESP32-Ethernet-Kit boards. Which GPIOs are available as peripherals depends on used modules.
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<center>
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Function | GPIOs | Remarks |Configuration
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:---------------|:-------|:--------|:----------------------------------
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BTN0 | GPIO0 | not available if `esp_eth` is used | |
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ADC | GPIO34, GPIO35, GPIO36, GPIO39 | | \ref esp32_adc_channels "ADC Channels"
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DAC | - | | \ref esp32_dac_channels "DAC Channels"
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PWM_DEV(0) | GPIO2, GPIO4 | | \ref esp32_pwm_channels "PWM Channels"
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I2C_DEV(0):SDA | GPIO32 | | \ref esp32_i2c_interfaces "I2C Interfaces"
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I2C_DEV(0):SCL | GPIO33 | | \ref esp32_i2c_interfaces "I2C Interfaces"
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SPI_DEV(0):CLK | GPIO14 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
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SPI_DEV(0):MISO | GPIO12 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
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SPI_DEV(0):MOSI | GPIO13 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
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SPI_DEV(0):CS0 | GPIO15 | HSPI is used | \ref esp32_spi_interfaces "SPI Interfaces"
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UART_DEV(0):TxD | GPIO1 | Console (configuration is fixed) | \ref esp32_uart_interfaces "UART interfaces"
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UART_DEV(0):RxD | GPIO3 | Console (configuration is fixed) | \ref esp32_uart_interfaces "UART interfaces"
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</center>
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\n
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@note
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SPI_DEV(0) is not available if module `esp_jtag` is used. For the SPI_DEV(0) pins to work properly, the function switches (DIP switches) for the JTAG signals must be set to OFF.
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[Back to table of contents](#esp32_ethernet_kit_v1_2_toc)
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### Board Pinout {#esp32_ethernet_kit_v1_2_pinout}
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The board schematic can be found [here](https://dl.espressif.com/dl/schematics/SCH_ESP32-Ethernet-Kit_A_V1.2_20200528.pdf).
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By default, only 4 bidirectional GPIO pins are unused: GPIO2, GPIO4, GPIO32, GPIO33. The suggested configuration is for PWM
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and I2C, but they can also be used for SPI or another serial port. By disabling the JTAG interface on the board,
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another 4 GPIOs can be made available (GPIO12, GPIO13, GPIO14, GPIO15).
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[Back to table of contents](#esp32_ethernet_kit_v1_2_toc)
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## Other Documentation Resources {#esp32_ethernet_kit_v1_2_other-resources}
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There is a comprehensive [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-ethernet-kit.html) for the ESP32-Ethernet-Kit with a lot information about hardware configuration.
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[Back to table of contents](#esp32_ethernet_kit_v1_2_toc)
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