embedded-trainings-2020/embedded-workshop-book/src/bsc-exercise.md

BSC Exercise

In this exercise you will learn how to write a board support crate. The template will already contain the LED and timer implementation.

Note: Introduction to the exercise is a guided tour through the template and running the hello example.

Learning goals

• implement buttons functionality
• UARTE implementation
• impl blocks, associated functions, methods
• generate docs!

Prerequesits

Tasks

• Write a button implementation. This entails the following steps
  • struct Buttons with 4 fields, that represents each of the four buttons
  • struct Button that is a wrapper for the pin that a single button is connected to
  • a method is_pushed that checks if a single button is pushed.
  • initialize the pins in fn init()
  • add the struct Button to the definition and instantiation of struct Board.
  • Run apps/buttons.rs to test.
• Write a UARTE implementation.

Knowledge

Representation of Peripherals

The boards peripherals are represented as nested structs. The struct Board contains fields that represent single peripherals or groups of peripherals as structs, which in turn either contain a field of the single peripheral or ...

You have to add structs to represent the buttons and the UARTE peripheral to the board struct.

Comments

impl blocks

visibility of structs, fields and functions: the pub keyword

Hardware documentation for pin configuration