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STM32F4_course

Git repository for Basics of Microprocessors Technology course hosted by Institute of Control and Information Engineering on Poznan University of Technology.

Description

The main file (main.c) allows to choose (by commenting/uncommenting appropriate functions) example code for each class (eg. lab01(); lab02();). Each function is wrapped in infinite loop so only one will be executed. All the instructions for classes can be found on Google Drive (only in Polish language):
https://drive.google.com/open?id=0B7GyMR8rCWn4OUJHOVZHYXhNZ2M&authuser=0

In addition example code for testing expansion board is provided. It uses FreeRTOS operating system to test all the peripherals:

  • main board leds (4) and button - leds are turning on and off and button changes the direction,
  • expansion board leds (4) and buttons (4) - each button enables to toggle the corresponding led,
  • rgb led - fading effect,
  • potentiometer and small speaker - generating sinus wave and changing the frequency using potentiometer,
  • i2c thermometer and serial port - sending the measured temperature through the serial port.

Sample video with some functions shown can be seen:
https://www.youtube.com/watch?v=UjolNzCQiy4&feature=youtu.be

How to compile the code

FreeRTOS in this example require hard FPU, so following steps should be used:

  • in View->Configuartion menu, in Compile tab FPU hard option should be choosen,
  • in the same tab in Includepaths path to libraries should be added; in my case it was: C:\Program Files (x86)\GNU Tools ARM Embedded\4.8 2014q3\arm-none-eabi\lib\armv7e-m\fpu
  • in Link tab in Linked Libraries m libarary should be added.

IDE and Compiler Setup

This project is created with free CooCox IDE and GNU Tools for ARM.

Attributions

FreeRTOS code based on:
https://github.com/hmph/FreeRTOS-template-for-STM32F4 and following fork:
https://github.com/tocchi02/FreeRTOS-template-for-STM32F4

My changes: Some clean-ups, added more task, some changes to FreeRTOSConfig.h - heap size was too low for more than just few simple tasks.

I2C functions from:
http://eliaselectronics.com/
https://github.com/devthrash/STM32F4-examples

Fading RGB based on:
http://www.instructables.com/id/Digispark-RGB-LED-Fader/step4/Arduino-Program/

Details about STM32F4, FPU and CooCox:
http://virtual-shed.blogspot.com/2012/12/fpu-on-stm32f4-with-coocox_18.html

License

MIT