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Mikroe Clicker 2 for STM32 and STLink v2

Mikroe Clicker 2 for STM32 and STLink v2

In this tutorial we are going to see how to connect a STLink v2 debugger to a Clicker 2 for STM32 enabling users to do debugging which could be very useful in development phases. A debugger is a computer program which is used to test and debug another program usually named Target.

In embedded things are slightly different since the code is executed on an external MCU and it is required an interface Computer-MCU. In this case the Target is the MCU and a debugger is composed by the ensemble of a hardware and a software tool. Nonetheless, when the majority of people is continue reading...

Getting started with mikroe Clicker 2 for STM32 with ChibiOS

Getting started with mikroe Clicker 2 for STM32 with ChibiOS

The Clicker 2 for STM32 is a compact development kit by mikroe (also known as MikroElektronika). This board is equipped with 2 mikroBUS socket that allow to connect the Click Boards. These boards, designed by mikroe, are small add-ons that allow to easily connect most common devices to your MCU. Indeed, in the last years mikroe has produced a lot of Click Boards (more than one hundred) with an extended documentation and with code examples.

During the Maker Faire Rome 2015, we meet some mikroe employee and we have explained them the purposes of PLAY Embedded. Some weeks continue reading...

Reading a Joystick on STM32 using ChibiOS

Reading a Joystick on STM32 using ChibiOS

The joystick proposed here is much known between makers. It provides two axis and a key button and every axis is actually a potentiometer: that means axis data is analogue and we need to use ADC to read its positioning.

Potentiometers are provided of springs so, without forcing, wipers are approximately positioned in the centre of the two resistive elements. As this device is very simple to use, it is not easy find a related datasheet. Indeed, for the most of the applications, it would be useless. Anyway, joystick used in this demo is a very cheap one marked as continue reading...

7-segment display and STM32 using ChibiOS

7-segment display and STM32 using ChibiOS

We have already introduced MAX7219 in STM32, ChibiOS and a 8×8 LED Matrix, so we are going to jump directly to code section. For convenience we just report link to documentation:

MAX7219 Datasheet

Note that even if pins are arranged in a different way, pin-out remains the same of the 8×8 LED matrix.

In this demo we are going to use Code-B decode to write with ease some number on our 8 digit 7-segment display.

In the demo shown in the video above we set up MAX7219 as normal operation mode, Code-B decode mode for each digit, scanning the whole display with the maximum continue reading...

IR Remote and STM32 using ChibiOS

IR Remote and STM32 using ChibiOS

Using Infra-Red for remote control is a technology born in the 70’s and after 40 years it is still used because the good ratio performances-costs and low power consumption. IR remote require a line of sight, because of that latest remote includes bluetooth technology.

Today it is possible to buy a small remote and receiving circuitry spending a few dollars. In Embedded system using IR could be a fast and cheap solution for remote control even if nowadays RF, Bluetooth and WiFi modules are very affordable.

Searching documentation for cheap devices is often not easy at continue reading...