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Bare-Metal Embedded C Programming

Bare-Metal Embedded C Programming

By : Israel Gbati
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Bare-Metal Embedded C Programming

Bare-Metal Embedded C Programming

5 (2)
By: Israel Gbati

Overview of this book

Bare-Metal Embedded C Programming takes you on an unparalleled journey to equip you with the skills and knowledge to excel in the world of embedded systems. The author, with over a decade of hands-on experience in engineering, takes a unique, practical approach to teach you how to decode microcontroller datasheets so that you’re able to extract vital information for precise firmware development. Register manipulation will become second nature to you as you learn to craft optimized code from scratch. The book provides in-depth insights into the hardware intricacies of microcontrollers. You'll navigate user manuals and documentation with ease, ensuring a profound understanding of the underlying technology. The true uniqueness of this book lies in its commitment to fostering independent expertise. Instead of simply copy pasting, you'll develop the capability to create firmware with confidence, paving the way for professional-grade mastery. By the end of this book, you'll have honed your skills in reading datasheets, performing register manipulations, and crafting optimized code, as well as gained the confidence needed to navigate hardware intricacies and write optimized firmware independently, making you a proficient and self-reliant embedded systems developer.
Table of Contents (22 chapters)
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Developing the UART driver

In this section, we will apply everything we’ve learned about the UART peripheral to develop a driver for transmitting data using the USART2 peripheral.

Let’s begin by identifying the GPIO pins connected to the UART2 peripheral. To do this, refer to the table on page 39 of the STM32F411RE datasheet. This table lists all the GPIO pins of the microcontroller, along with their descriptions and additional functionalities. As shown in Figure 10.3, part of this table reveals that PA1 has an alternate function labeled as USART2_TX:

Figure 10.3: The USART2_TX pin

Figure 10.3: The USART2_TX pin

To use PA2 as the USART2_TX line, we need to configure PA2 as an alternate function pin in the GPIOA_MODER register and then specify the alternate function number for USART2_TX in the GPIOA_AFRL register. The STM32F4 microcontroller allows us to choose from 16 different alternate functions, numbered from AF00 to AF15. The alternate function mapping table, which...

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