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Overview

boards/st/st25dv_mb1283_disco/doc/index.rst

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.. zephyr:board:: st25dv_mb1283_disco

Overview

The ST25DV04K device is a dynamic NFC/RFID tag IC with a dual interface. It embeds a 4 Kbits EEPROM memory. It can be operated from an I2C interface, or by a 13.56 MHz RFID reader, or by a NFC phone. The ST25DV04K Class 5 antenna daughter card, included in the kit, can be replaced by Class 1 or Class 6 antennas.

The ST25DV-DISCOVERY is a demonstration kit to evaluate the features and capabilities of the ST25DV series. It is based on the NFC ST25DV04K device embedded on a daughter card using a Class 5 antenna and a STM32 processor driving a mother board.

.. note:: The ST25DV itself is not implemented yet.

Hardware

The ST25DV Discovery kit provides the following hardware components:

  • Main board: ST25DV_Discovery_Mboard:

    • STM32F405VGT6 LQFP100 32-bit microcontroller, with 1 Mbyte Flash memory, 192 + 4 Kbytes SRAM.
    • LCD color screen (320 x 200 pixels)
    • Touch screen driver
    • Different color LEDs (power, user, ST link)
    • User push button
    • Joystick for menu selection
    • Reset button
    • On board ST link for microcontroller firmware upgrade and debug
    • ST link mini USB
    • User micro USB
    • USB micro or mini connector for board powering
    • Demonstration edition (optional add-on module) with Bluetooth® Low Energy module, Wi-Fi ® module and JTAG 20 pin connector

It exists in two variants, MB1283 and MB1285.

  • Antenna daughter board: ST25DV_Discovery_ANT_C5:

    • 40 mm x 24 mm, 13.56 MHz inductive antenna etched on the PCB
    • ST25DV04K Dynamic NFC / RFID tag
    • I 2 C interface connector
    • Energy harvesting output (VOUT) with a 10nF capacitance filtering circuit
    • GPO configurable as RF WIP/BUSY output, to indicate that an RF operation is ongoing

The antenna board can be removed, and its 14-pin 0.254mm header connector used as an eval kit header.

Connections and IOs

Default Zephyr Peripheral Mapping

  • UART_6 TX/RX : PC6/PC7 (ST-Link Virtual Port Com)
  • UART_2 TX/RX : PA2/PA3 (Available on J6 connector)
  • I2C1 SCL/SDA : PB6/PB7 (Touchscreen STMPE811, interrupt pin PB5)
  • SPI2 SCK/MOSI/CS : PB13/PC3/PB12 (LCD display FRD24048TP, reset pin PC1, DC pin PC0)
  • SPI1 SCK/MISO/MOSI/CS : PA5/PA6/PA7/PA4 (External ST25DV connector J6)
  • GPIO : PE8/PE9/PE10/PE11/PE12 (Joystick)
  • LD1 : PC13 (Orange led)
  • LD2 : PC4 (Yellow led)
  • GPIO : PE15/PE7 (Available on external ST25DV connector J6)
  • GPIO : PE14 (Available on J5 connector)

Supported Features

.. zephyr:board-supported-hw::

Serial Port

The Zephyr console output and shell are assigned to UART6, which is connected to the onboard ST-LINK/V2 Virtual COM port interface. Default communication settings are 115200 8N1.

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the st25dv_mb1283_disco board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details).

If programming fails, press the reset button (black) and release it while "west flash" is running.

Flashing

ST25DV Discovery kit includes an ST-LINK/V2 embedded debug tool interface. This interface is supported by the openocd version included in the Zephyr SDK.

Flashing an application to ST25DV Discovery

First, connect the ST25DV Discovery kit to your host computer using the USB port to prepare it for flashing. Then build and flash your application.

Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: st25dv_mb1283_disco :goals: build flash

Run a serial host program to connect with your board:

.. code-block:: console

$ minicom -D /dev/ttyACM0

You should see the following message on the console:

.. code-block:: console

Hello World! st25dv_mb1283_disco

Debugging

You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: st25dv_mb1283_disco :goals: debug

.. _ST25DV-DISCO website: https://www.st.com/en/nfc/st25dv-i2c-series-dynamic-nfc-tags.html

.. _ST25DV datasheet: https://www.st.com/resource/en/datasheet/st25dv04k.pdf

.. _STM32F40xxx reference manual: https://www.st.com/resource/en/reference_manual/rm0090-stm32f405415-stm32f407417-stm32f427437-and-stm32f429439-advanced-armbased-32bit-mcus-stmicroelectronics.pdf