Studying a Device One Register at a Time
A hardware datasheet lists dozens of registers, and trying to hold them all in your head at once is how people bounce off driver writing. Instead you take one register per sitting: read what the datasheet says it does, write the few lines of code that touch only that register, run it, and confirm the value you get back is the value the datasheet promised. The device becomes a small set of facts you have each personally verified, rather than a wall of documentation you skimmed.
Questions this Concept answers
- Why does confirming each register's behaviour against the datasheet matter more than reading the datasheet through?
Reading Microcontroller Datasheets and Reference Manuals for Bare-Metal Programming
Bare-metal microcontroller programming requires reading two primary vendor documents: the datasheet, which describes the chip's peripherals (GPIO, ADC, DAC, SPI, USART, timers, etc.) and their organi…