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embedded-hal

The embedded-hal crate provides a number of traits covering common microcontroller peripherals:

• GPIO
• PWM
• Delay timers
• I2C and SPI buses and devices

Similar traits for byte streams (e.g. UARTs), CAN buses and RNGs are broken out into embedded-io, embedded-can and rand_core respectively.

Other crates then implement drivers in terms of these traits, e.g. an accelerometer driver might need an I2C or SPI device instance.

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• The traits cover using the peripherals but not initializing or configuring them, as initialization and configuration is highly platform-specific.
• There are implementations for many microcontrollers, as well as other platforms such as Linux on Raspberry Pi.
• embedded-hal-async provides async versions of the traits.
• embedded-hal-nb provides another approach to non-blocking I/O, based on the nb crate.

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