Merge #191

191: Added AVR crates to lists r=adamgreig a=jonahbron

I've recently gotten involved with an AVR HAL project and realized they were not listed in the official list.  They are still under development and not published, but it seems good to have them exposed.

Co-authored-by: Jonah Dahlquist <[email protected]>

Author: bors[bot]

README.md

@@ -120,6 +120,7 @@ Peripheral Access Crates were also called Device Crates.
 
 - [`atsamd21`](https://github.com/atsamd-rs/atsamd) Peripheral access API for Microchip (formerly Atmel) SAMD21 microcontrollers.  This git repo hosts both the peripheral access crate and the hal.
 - [`atsamd51`](https://github.com/atsamd-rs/atsamd) Peripheral access API for Microchip (formerly Atmel) SAMD51 microcontrollers.  This git repo hosts both the peripheral access crate and the hal.
+- [`avr-device`](https://github.com/Rahix/avr-device) Peripheral access API for Microchip (formerly Atmel) AVR microcontroller family.
 - [`sam3x8e`](https://crates.io/crates/sam3x8e) Peripheral access API for Atmel SAMD3X8E microcontrollers (generated using svd2rust)  - ![crates.io](https://img.shields.io/crates/v/sam3x8e.svg)
 
 ### Nordic
@@ -184,6 +185,7 @@ Implementations of [`embedded-hal`] for microcontroller families and systems run
 ### Microchip
 
 - [`atsamd-hal`](https://crates.io/crates/atsamd-hal) - HAL for SAMD21 and SAMD51 - ![crates.io](https://img.shields.io/crates/v/atsamd-hal.svg)
+- ['avr-hal'](https://github.com/Rahix/avr-hal) - HAL for AVR microcontroller family and AVR-based boards
 
 ### Nordic
 
@@ -295,6 +297,10 @@ Crates tailored for specific boards.
 - [`pyportal`](https://crates.io/crates/pyportal) - ![crates.io](https://img.shields.io/crates/v/pyportal.svg)
 - [`trellis_m4`](https://crates.io/crates/trellis_m4) - ![crates.io](https://img.shields.io/crates/v/trellis_m4.svg)
 
+### Arduino
+
+- [`avr-hal`](https://github.com/Rahix/avr-hal) - Board support crate for several AVR-based boards including the Arduino Uno and the Arduino Leonardo
+
 ### Nordic
 
 - [`dwm1001`](https://crates.io/crates/dwm1001) - [Decawave DWM1001-DEV] - ![crates.io](https://img.shields.io/crates/v/dwm1001.svg)