Book Image

ARM?? Cortex?? M4 Cookbook

By : Dr. Mark Fisher
Book Image

ARM?? Cortex?? M4 Cookbook

By: Dr. Mark Fisher

Overview of this book

Embedded microcontrollers are at the core of many everyday electronic devices. Electronic automotive systems rely on these devices for engine management, anti-lock brakes, in car entertainment, automatic transmission, active suspension, satellite navigation, etc. The so-called internet of things drives the market for such technology, so much so that embedded cores now represent 90% of all processor’s sold. The ARM Cortex-M4 is one of the most powerful microcontrollers on the market and includes a floating point unit (FPU) which enables it to address applications. The ARM Cortex-M4 Microcontroller Cookbook provides a practical introduction to programming an embedded microcontroller architecture. This book attempts to address this through a series of recipes that develop embedded applications targeting the ARM-Cortex M4 device family. The recipes in this book have all been tested using the Keil MCBSTM32F400 board. This board includes a small graphic LCD touchscreen (320x240 pixels) that can be used to create a variety of 2D gaming applications. These motivate a younger audience and are used throughout the book to illustrate particular hardware peripherals and software concepts. C language is used predominantly throughout but one chapter is devoted to recipes involving assembly language. Programs are mostly written using ARM’s free microcontroller development kit (MDK) but for those looking for open source development environments the book also shows how to configure the ARM-GNU toolchain. Some of the recipes described in the book are the basis for laboratories and assignments undertaken by undergraduates.
Table of Contents (16 chapters)
ARM Cortex M4 Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Setting the RTE for the I2C Peripheral Bus


The LCD touchscreen, three-axis motion sensor (LIS302DL), audio-codec (CS42L52), 64k EEPROM (M24C64), camera, and other peripherals that are supported by the MCBSTM32F400 evaluation board are connected to the STM32C microcontroller by a synchronous serial bus called I2C. The bus standard adopted is called the Inter-Integrated Circuit (I2C) Interface, which was developed by Phillips in the 1980s. Before we can use any peripherals that are connected to the I2C bus, we must first configure the I2C interface. We'll illustrate this by a recipe called touchScreenDemo_c6v0. Later in this chapter, we'll show you how to configure other I2C peripherals.

How to do it…

To set RTE for an I2C Peripheral Bus perform the following steps:

  1. Open a new project (touchScreenDemo), in a new folder named touchScreenDemo_c6v0.

  2. Using the RTE manager, select Touchscreen (an I2C peripheral) under Software Component | Board Support.

  3. Set the CMSIS and Device options, as we've done...