HALs and Device Drivers
Learn to use Hardware Abstraction Layers (HALs) and write simple device drivers to interact with peripherals on microcontrollers.
Hardware Abstraction Layers (HALs)
Welcome to the world of embedded Rust! When working with microcontrollers, you'll encounter a crucial concept: Hardware Abstraction Layers (HALs).
A HAL is a software layer that provides a standardized interface to a microcontroller's peripherals, like GPIO pins, I2C, SPI, and UART. It hides the messy details of direct register manipulation.
Why We Need HALs
Imagine trying to blink an LED. On one microcontroller, you might set a bit in register GPIO_PORTA_DR. On another, it could be PIND_OUT.
- Complexity: Direct register access is tedious and error-prone.
- Portability: Without HALs, code written for one chip won't work on another, even if they're from the same family.
HALs solve this by giving you a consistent way to interact with hardware, regardless of the underlying chip.
All lessons in this course
- Introduction to Embedded Rust
- HALs and Device Drivers
- Operating System Development Concepts