Clicker 2 for STM32

Overview

MikroE Clicker 2 for STM32 is a development board containing an STM32F407 microcontroller. It is equipped with two mikrobus sockets and furthermore has two headers for general signal break out. The board also has battery connection and a battery management unit on board. It can be powered either from a battery pack, such as a LiPo or from USB. The board is equipped with a 25MHz crystal as well as a 32.768kHz clock crystal.

Hardware

The Clicker 2 board contains the following connections:

  • Two MikroBUS connectors

  • Two headers with general connections

Furthermore the board contains two LEDs and two push buttons that are connected to the microcontroller.

Supported Features

The mikroe_clicker_2 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.

Connections and IOs

The two mikroBUS interfaces are aliased in the device tree so that their peripherals can be accessed using mikrobus_N_INTERFACE so e.g. the spi on bus 2 can be found by the alias mikrobus_2_spi. The counting corresponds with the marking on the board.

For connections on the edge connectors, please refer to Clicker 2 for STM32 User Manual.

Programming and Debugging

The mikroe_clicker_2 board supports the runners and associated west commands listed below.

flash debug

Applications for the mikroe_clicker_2 board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

The initial state of the board is set to lock. When you flash, it will fail with the message:

Error: stm32x device protected

Unlocking with openocd makes it possible to flash.

$ openocd -f /usr/share/openocd/scripts/interface/stlink-v2.cfg \
    -f /usr/share/openocd/scripts/target/stm32f4x.cfg -c init\
    -c "reset halt" -c "stm32f4x unlock 0" -c "reset run" -c shutdown

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b mikroe_clicker_2 samples/hello_world
west flash

You should see the following message on the console:

Hello World! mikroe_clicker_2

Debugging

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 mikroe_clicker_2 samples/hello_world
west debug

References