Core2

Board Overview

Core2

Name:

m5stack_core2

Vendor:

M5Stack

Architecture:

xtensa

SoC:

esp32

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Overview

M5Stack Core2 is an ESP32-based development board from M5Stack. It is the successor for the Core module.

M5Stack Core2 features the following integrated components:

• ESP32-D0WDQ6-V3 chip (240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi)

• PSRAM 8MB

• Flash 16MB

• LCD IPS TFT 2”, 320x240 px screen (ILI9342C)

• Touch screen (FT6336U)

• PMU AXP192

• Audio NS4168 amplifier (1W-092 speaker)

• Vibration motor

• RTC BM8563

• USB CP2104

• SD-Card slot

• Grove connector

• IMO 6-axis IMU MPU6886

• MIC SPM1423

• Battery 390mAh 3,7V

Functional Description

The following table below describes the key components, interfaces, and controls of the M5Stack Core2 board.

Key Component	Description	Status
ESP32-D0WDQ6-V2 module	This MPU-ESP32 module provides complete Wi-Fi and Bluetooth functionalities and integrates a 16-MB SPI flash.	supported
32.768 kHz RTC	External precision 32.768 kHz crystal oscillator serves as a clock with low-power consumption while the chip is in Deep-sleep mode.	supported
Status LED	One user LED connected to the GPIO pin.	supported
USB Port	USB interface. Power supply for the board as well as the communication interface between a computer and the board. Contains: TypeC x 1, GROVE(I2C+I/O+UART) x 1	supported
Reset button	Reset button	supported
Power Switch	Power on/off button.	supported
LCD screen	Built-in LCD TFT display (LCD-ILI9342C, 2”, 320x240 px) controlled via SPI interface	supported
SD-Card slot	SD-Card connection via SPI-mode.	supported
6-axis IMU MPU6886	The MPU-6886 is a 6-axis motion tracker (6DOF IMU) device that combines a 3-axis gyroscope and a 3-axis accelerometer. For details please refer to M5Stack-Core2 base shield	supported
Grove port	Note: Grove port requires 5V to be enabled via bus_5v regulator	supported
Built-in microphone	The SPM-1423 I2S driven microphone.	todo
Built-in speaker	1W speaker for audio output via I2S interface.	todo
Battery-support	Power supply via battery is supported automatically. But there is no possibility to query current battery status.	todo

Power supply

M5Stack Core2 module is equipped with the feature-rich power management IC (x-powers,axp192-regulator). Following regulators are utilized on this module:

• vdd_mcu: Main power supply for the MCU.

• lcd_bg: Display backlight voltage.

• v_peri: Periphal supply. This regulator controls supply for the display, SD-Card.

• vib_motor: Vibration motor regulator.

• bus_5v BUS_5V supply for Grove port. Note: This fixed regulator supply is disabled by default.

These voltages can be controlled via regulator api.

Supported Features

The m5stack_core2 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.

m5stack_core2

/

esp32/appcpuesp32/procpu

m5stack_core2/esp32/appcpu target

Type	Location	Description	Compatible
CPU	on-chip	Espressif Xtensa LX6 CPU2	espressif,xtensa-lx6
ADC	on-chip	ESP32 ADC2	espressif,esp32-adc
Bluetooth	on-chip	Bluetooth HCI for Espressif ESP321	espressif,esp32-bt-hci
CAN	on-chip	ESP32 Two-Wire Automotive Interface (TWAI)1	espressif,esp32-twai
Clock control	on-chip	ESP32 RTC (Power & Clock Controller Module) Module1	espressif,esp32-rtc
Counter	on-chip	ESP32 Counter Driver based on RTC Main Timer1	espressif,esp32-rtc-timer
	on-chip	ESP32 general-purpose timers4	espressif,esp32-timer
DAC	on-chip	ESP32 Digital to Analog converter (DAC)1	espressif,esp32-dac
Ethernet	on-chip	ESP32 Ethernet1	espressif,esp32-eth
Flash controller	on-chip	ESP32 flash controller1	espressif,esp32-flash-controller
GPIO & Headers	on-chip	ESP32 GPIO controller2	espressif,esp32-gpio
I2C	on-chip	ESP32 I2C2	espressif,esp32-i2c
Input	on-chip	ESP32 touch sensor input1	espressif,esp32-touch
Interrupt controller	on-chip	ESP32 Interrupt controller1	espressif,esp32-intc
IPM	on-chip	ESP32 soft inter processor message1	espressif,esp32-ipm
Mailbox	on-chip	ESP32 soft mailbox1	espressif,mbox-esp32
MDIO	on-chip	ESP32 MDIO controller1	espressif,esp32-mdio
Memory controller	on-chip	ESP32 pseudo-static RAM controller1	espressif,esp32-psram
MTD	on-chip	Flash node1	soc-nv-flash
	on-chip	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Pin control	on-chip	ESP32 pin controller1	espressif,esp32-pinctrl
PWM	on-chip	ESP32 LED Control (LEDC)1	espressif,esp32-ledc
	on-chip	ESP32 Motor Control Pulse Width Modulator (MCPWM)2	espressif,esp32-mcpwm
RNG	on-chip	ESP32 TRNG (True Random Number Generator)1	espressif,esp32-trng
SDHC	on-chip	ESP32 SDHC controller1	espressif,esp32-sdhc
	on-chip	ESP32 SDHC controller slot2	espressif,esp32-sdhc-slot
Sensors	on-chip	ESP32 Pulse Counter (PCNT)1	espressif,esp32-pcnt
Serial controller	on-chip	ESP32 UART3	espressif,esp32-uart
SPI	on-chip	ESP32 SPI2	espressif,esp32-spi
SRAM	on-chip	Generic on-chip SRAM description2	mmio-sram
Watchdog	on-chip	ESP32 watchdog1 1	espressif,esp32-watchdog
Wi-Fi	on-chip	ESP32 SoC Wi-Fi1	espressif,esp32-wifi

m5stack_core2/esp32/procpu target

Type	Location	Description	Compatible
CPU	on-chip	Espressif Xtensa LX6 CPU2	espressif,xtensa-lx6
ADC	on-chip	ESP32 ADC2	espressif,esp32-adc
Bluetooth	on-chip	Bluetooth HCI for Espressif ESP321	espressif,esp32-bt-hci
CAN	on-chip	ESP32 Two-Wire Automotive Interface (TWAI)1	espressif,esp32-twai
Clock control	on-chip	ESP32 RTC (Power & Clock Controller Module) Module1	espressif,esp32-rtc
Counter	on-chip	ESP32 Counter Driver based on RTC Main Timer1	espressif,esp32-rtc-timer
	on-chip	ESP32 general-purpose timers4	espressif,esp32-timer
DAC	on-chip	ESP32 Digital to Analog converter (DAC)1	espressif,esp32-dac
Display	on-board	ILI9342C 320x240 display controller1	ilitek,ili9342c
Ethernet	on-chip	ESP32 Ethernet1	espressif,esp32-eth
Flash controller	on-chip	ESP32 flash controller1	espressif,esp32-flash-controller
GPIO & Headers	on-chip	ESP32 GPIO controller2	espressif,esp32-gpio
	on-board	AXP192 GPIO Controller AX192 features 5 native GPIOs1	x-powers,axp192-gpio
	on-board	GPIO pins exposed on Grove 4 pins headers1	grove-header
	on-board	GPIO pins exposed on M5Stack M-Bus headers1	m5stack,mbus-header
I2C	on-chip	ESP32 I2C1 1	espressif,esp32-i2c
Input	on-chip	ESP32 touch sensor input1	espressif,esp32-touch
	on-board	FT3267/FT5XX6/FT6XX6 capacitive touch panels1	focaltech,ft5336
Interrupt controller	on-chip	ESP32 Interrupt controller1	espressif,esp32-intc
IPM	on-chip	ESP32 soft inter processor message1	espressif,esp32-ipm
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
Mailbox	on-chip	ESP32 soft mailbox1	espressif,mbox-esp32
MDIO	on-chip	ESP32 MDIO controller1	espressif,esp32-mdio
Memory controller	on-chip	ESP32 pseudo-static RAM controller1	espressif,esp32-psram
Multi-Function Device	on-board	X-Powers AXP1921	x-powers,axp192
MTD	on-chip	Flash node1	soc-nv-flash
	on-chip	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Pin control	on-chip	ESP32 pin controller1	espressif,esp32-pinctrl
PWM	on-chip	ESP32 LED Control (LEDC)1	espressif,esp32-ledc
	on-chip	ESP32 Motor Control Pulse Width Modulator (MCPWM)2	espressif,esp32-mcpwm
Regulator	on-board	AXP192 PMIC1	x-powers,axp192-regulator
	on-board	Fixed voltage regulators1	regulator-fixed
RNG	on-chip	ESP32 TRNG (True Random Number Generator)1	espressif,esp32-trng
RTC	on-board	NXP PCF8563 RTC1	nxp,pcf8563
SDHC	on-chip	ESP32 SDHC controller1	espressif,esp32-sdhc
	on-chip	ESP32 SDHC controller slot2	espressif,esp32-sdhc-slot
Sensors	on-chip	ESP32 Pulse Counter (PCNT)1	espressif,esp32-pcnt
Serial controller	on-chip	ESP32 UART1 2	espressif,esp32-uart
SPI	on-chip	ESP32 SPI1 1	espressif,esp32-spi
SRAM	on-chip	Generic on-chip SRAM description2	mmio-sram
Watchdog	on-chip	ESP32 watchdog1 1	espressif,esp32-watchdog
Wi-Fi	on-chip	ESP32 SoC Wi-Fi1	espressif,esp32-wifi

Start Application Development

Before powering up your M5Stack Core2, please make sure that the board is in good condition with no obvious signs of damage.

System requirements

Prerequisites

Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command below to retrieve those files.

west blobs fetch hal_espressif

Note

It is recommended running the command above after west update.

Building & Flashing

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

# From the root of the zephyr repository
west build -b m5stack_core2/esp32/procpu samples/hello_world

The usual flash target will work with the m5stack_core2 board configuration. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b m5stack_core2/esp32/procpu samples/hello_world
west flash

The baud rate of 921600bps is set by default. If experiencing issues when flashing, try using different values by using --esp-baud-rate <BAUD> option during west flash (e.g. west flash --esp-baud-rate 115200).

You can also open the serial monitor using the following command:

west espressif monitor

After the board has automatically reset and booted, you should see the following message in the monitor:

***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
Hello World! m5stack_core2

Debugging

M5Stack Core2 debugging is not supported due to pinout limitations.

Related Documents

• M5Stack-Core2 schematic (PDF)

• ESP32-PICO-D4 Datasheet (PDF)

• M5Stack-Core2 docs

• ESP32 Datasheet (PDF)

• ESP32 Hardware Reference