M5Stack STAMP-C3
Overview
STAMP-C3 featuring ESPRESSIF ESP32-C3 RISC-V MCU with Wi-Fi connectivity for IoT edge devices such as home appliances and Industrial Automation.
For more details see the M5Stack STAMP-C3 [1] page.
Supported Features
The STAMP-C3 board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
PMP |
on-chip |
arch/riscv |
INTMTRX |
on-chip |
intc_esp32c3 |
PINMUX |
on-chip |
pinctrl_esp32 |
USB UART |
on-chip |
serial_esp32_usb |
GPIO |
on-chip |
gpio_esp32 |
UART |
on-chip |
uart_esp32 |
I2C |
on-chip |
i2c_esp32 |
SPI |
on-chip |
spi_esp32_spim |
TWAI |
on-chip |
can_esp32_twai |
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 stamp_c3 samples/hello_world
The usual flash target will work with the stamp_c3 board
configuration. Here is an example for the Hello World
application.
# From the root of the zephyr repository
west build -b stamp_c3 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! stamp_c3
Debugging
As with much custom hardware, the ESP32 modules require patches to OpenOCD that are not upstreamed yet. Espressif maintains their own fork of the project. The custom OpenOCD can be obtained at OpenOCD ESP32 [2]
The Zephyr SDK uses a bundled version of OpenOCD by default. You can overwrite that behavior by adding the
-DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>
parameter when building.
Here is an example for building the Hello World application.
# From the root of the zephyr repository
west build -b stamp_c3 samples/hello_world -- -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>
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 stamp_c3 samples/hello_world
west debug