ESP32-S3-DevKitM
Overview
The ESP32-S3-DevKitM is an entry-level development board equipped with either ESP32-S3-MINI-1 or ESP32-S3-MINI-1U, a module named for its small size. This board integrates complete Wi-Fi and Bluetooth Low Energy functions. For more information, check ESP32-S3-DevKitM User Guide [1].
Hardware
ESP32-S3 is a low-power MCU-based system on a chip (SoC) with integrated 2.4 GHz Wi-Fi and Bluetooth® Low Energy (Bluetooth LE). It consists of high-performance dual-core microprocessor (Xtensa® 32-bit LX7), a low power coprocessor, a Wi-Fi baseband, a Bluetooth LE baseband, RF module, and numerous peripherals.
ESP32-S3-DevKitM includes the following features:
Dual core 32-bit Xtensa Microprocessor (Tensilica LX7), running up to 240MHz
Additional vector instructions support for AI acceleration
512KB of SRAM
384KB of ROM
Wi-Fi 802.11b/g/n
Bluetooth LE 5.0 with long-range support and up to 2Mbps data rate
Digital interfaces:
45 programmable GPIOs
4x SPI
1x LCD interface (8-bit ~16-bit parallel RGB, I8080 and MOTO6800), supporting conversion between RGB565, YUV422, YUV420 and YUV411
1x DVP 8-bit ~16-bit camera interface
3x UART
2x I2C
2x I2S
1x RMT (TX/RX)
1x pulse counter
LED PWM controller, up to 8 channels
1x full-speed USB OTG
1x USB Serial/JTAG controller
2x MCPWM
1x SDIO host controller with 2 slots
General DMA controller (GDMA), with 5 transmit channels and 5 receive channels
1x TWAI® controller, compatible with ISO 11898-1 (CAN Specification 2.0)
Addressable RGB LED, driven by GPIO48.
Analog interfaces:
2x 12-bit SAR ADCs, up to 20 channels
1x temperature sensor
14x touch sensing IOs
Timers:
4x 54-bit general-purpose timers
1x 52-bit system timer
3x watchdog timers
Low Power:
Power Management Unit with five power modes
Ultra-Low-Power (ULP) coprocessors: ULP-RISC-V and ULP-FSM
Security:
Secure boot
Flash encryption
4-Kbit OTP, up to 1792 bits for users
Cryptographic hardware acceleration: (AES-128/256, Hash, RSA, RNG, HMAC, Digital signature)
Asymmetric Multiprocessing (AMP)
ESP32S3-DevKitM allows 2 different applications to be executed in ESP32-S3 SoC. Due to its dual-core architecture, each core can be enabled to execute customized tasks in stand-alone mode and/or exchanging data over OpenAMP framework. See Inter-Processor Communication (IPC) folder as code reference.
For more information, check the datasheet at ESP32-S3 Datasheet [2] or the technical reference manual at ESP32-S3 Technical Reference Manual [3].
Supported Features
Current Zephyr’s ESP32-S3-DevKitM board supports the following features:
Interface |
Controller |
Driver/Component |
|---|---|---|
UART |
on-chip |
serial port |
GPIO |
on-chip |
gpio |
PINMUX |
on-chip |
pinmux |
USB-JTAG |
on-chip |
hardware interface |
SPI Master |
on-chip |
spi |
TWAI/CAN |
on-chip |
can |
ADC |
on-chip |
adc |
Timers |
on-chip |
counter |
Watchdog |
on-chip |
watchdog |
TRNG |
on-chip |
entropy |
LEDC |
on-chip |
pwm |
MCPWM |
on-chip |
pwm |
PCNT |
on-chip |
qdec |
GDMA |
on-chip |
dma |
USB-CDC |
on-chip |
serial |
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
Simple boot
The board could be loaded using the single binary image, without 2nd stage bootloader. It is the default option when building the application without additional configuration.
Note
Simple boot does not provide any security features nor OTA updates.
MCUboot bootloader
User may choose to use MCUboot bootloader instead. In that case the bootloader must be built (and flashed) at least once.
There are two options to be used when building an application:
Sysbuild
Manual build
Note
User can select the MCUboot bootloader by adding the following line to the board default configuration file.
CONFIG_BOOTLOADER_MCUBOOT=y
Sysbuild
The sysbuild makes possible to build and flash all necessary images needed to bootstrap the board with the ESP32 SoC.
To build the sample application using sysbuild use the command:
west build -b esp32s3_devkitm --sysbuild samples/hello_world
By default, the ESP32 sysbuild creates bootloader (MCUboot) and application images. But it can be configured to create other kind of images.
Build directory structure created by sysbuild is different from traditional Zephyr build. Output is structured by the domain subdirectories:
build/
├── hello_world
│ └── zephyr
│ ├── zephyr.elf
│ └── zephyr.bin
├── mcuboot
│ └── zephyr
│ ├── zephyr.elf
│ └── zephyr.bin
└── domains.yaml
Note
With --sysbuild option the bootloader will be re-build and re-flash
every time the pristine build is used.
For more information about the system build please read the Sysbuild (System build) documentation.
Manual build
During the development cycle, it is intended to build & flash as quickly possible. For that reason, images can be built one at a time using traditional build.
The instructions following are relevant for both manual build and sysbuild. The only difference is the structure of the build directory.
Note
Remember that bootloader (MCUboot) needs to be flash at least once.
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 esp32s3_devkitm/esp32s3/procpu samples/hello_world
The usual flash target will work with the esp32s3_devkitm board
configuration. Here is an example for the Hello World
application.
# From the root of the zephyr repository
west build -b esp32s3_devkitm/esp32s3/procpu samples/hello_world
west flash
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! esp32s3_devkitm
Debugging
ESP32-S3 support on OpenOCD is available at OpenOCD ESP32 [4].
ESP32-S3 has a built-in JTAG circuitry and can be debugged without any additional chip. Only an USB cable connected to the D+/D- pins is necessary.
Further documentation can be obtained from the SoC vendor in JTAG debugging for ESP32-S3 [5].
Here is an example for building the Hello World application.
# From the root of the zephyr repository
west build -b esp32s3_devkitm/esp32s3/procpu samples/hello_world
west flash
You can debug an application in the usual way. Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b esp32s3_devkitm/esp32s3/procpu samples/hello_world
west debug