Usbtiny support

Cargo.toml

@@ -37,6 +37,7 @@ members = [
     "examples/sparkfun-promini-5v",
     "examples/trinket-pro",
     "examples/trinket",
+    "examples/usbtiny",
 ]
 exclude = [
     # The RAVEDUDE! Yeah!

arduino-hal/Cargo.toml

@@ -30,6 +30,7 @@ sparkfun-promini-3v3 = ["mcu-atmega", "atmega-hal/atmega328p", "atmega-hal/enabl
 sparkfun-promini-5v = ["mcu-atmega", "atmega-hal/atmega328p", "atmega-hal/enable-extra-adc", "board-selected"]
 trinket = ["mcu-attiny", "attiny-hal/attiny85", "board-selected"]
 nano168 = ["mcu-atmega", "atmega-hal/atmega168", "atmega-hal/enable-extra-adc", "board-selected"]
+usbtiny = ["mcu-attiny", "attiny-hal/attiny85", "board-selected"]
 
 # We must select a board to build on docs.rs
 docsrs = ["arduino-uno"]

arduino-hal/src/clock.rs

@@ -30,4 +30,6 @@ pub(crate) mod default {
     pub type DefaultClock = avr_hal_generic::clock::MHz16;
     #[cfg(any(feature = "trinket", feature = "sparkfun-promini-3v3"))]
     pub type DefaultClock = avr_hal_generic::clock::MHz8;
+    #[cfg(any(feature = "usbtiny"))]
+    pub type DefaultClock = avr_hal_generic::clock::MHz1;
 }

arduino-hal/src/lib.rs

@@ -25,6 +25,7 @@
 #![cfg_attr(feature = "trinket-pro", doc = "**Trinket Pro**.")]
 #![cfg_attr(feature = "trinket", doc = "**Trinket**.")]
 #![cfg_attr(feature = "nano168", doc = "**Nano clone (ATmega168)**.")]
+#![cfg_attr(feature = "usbtiny", doc = "**USBTiny**.")]
 //! This means that only items which are available for this board are visible.  If you are using a
 //! different board, try building the documentation locally with
 //!
@@ -74,6 +75,7 @@ compile_error!(
     * trinket-pro
     * trinket
     * nano168
+    * usbtiny
     "
 );
 

arduino-hal/src/port/mod.rs

@@ -55,3 +55,8 @@ pub use trinket_pro::*;
 mod trinket;
 #[cfg(feature = "trinket")]
 pub use trinket::*;
+
+#[cfg(feature = "usbtiny")]
+mod usbtiny;
+#[cfg(feature = "usbtiny")]
+pub use usbtiny::*;

arduino-hal/src/port/usbtiny.rs

@@ -0,0 +1,23 @@
+pub use attiny_hal::port::{mode, Pin, PinMode, PinOps};
+
+avr_hal_generic::renamed_pins! {
+    pub struct Pins {
+        /// `#0`: `PB0`, `0`, `PCINT0`, `D1`(SPI), `SDA`(I2C), `MOSI`, `AREF`, `OC0A`, `AIN0`
+        pub d0: attiny_hal::port::PB0 = pb0,
+        /// `#1`: `PB1`, `1`, `PCINT1`, `D0`(SPI), `SDA`(I2C), `MISO`, `AREF`, `OC0B`, `OC1A`, `AIN1`
+        pub d1: attiny_hal::port::PB1 = pb1,
+        /// `#2`: `PB2`, `2/A1`, `PCINT2` `SCK`(SPI), `SCL`(I2C), `INT0`, `ADC1`
+        pub d2: attiny_hal::port::PB2 = pb2,
+        /// `#3`: `PB3`, `3/A3`, `PCINT3`, `ACD3`, `XTAL1`
+        pub d3: attiny_hal::port::PB3 = pb3,
+        /// `#4`: `PB4`, `4/A2`, `PCINT4`, `OCB1`, `ADC2`, `XTAL2`
+        pub d4: attiny_hal::port::PB4 = pb4,
+        /// `#5`: `PB5`, `5/A0`, `PCINT5`, `RESET`, `ADC0`
+        pub d5: attiny_hal::port::PB5 = pb5,
+    }
+
+    impl Pins {
+        type Pin = Pin;
+        type McuPins = attiny_hal::Pins;
+    }
+}

examples/usbtiny/.cargo/config.toml

@@ -0,0 +1,9 @@
+[build]
+target = "avr-none"
+rustflags = ["-C", "target-cpu=attiny85"]
+
+[target.'cfg(target_arch = "avr")']
+runner = "ravedude"
+
+[unstable]
+build-std = ["core"]

examples/usbtiny/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "usbtiny-examples"
+version = "0.0.0"
+authors = ["Derek Hemingson <shadetheartist@gmail.com>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+panic-halt = "1.0.0"
+embedded-hal = "1.0.0"
+
+[dependencies.arduino-hal]
+path = "../../arduino-hal"
+features = ["usbtiny"]

examples/usbtiny/Ravedude.toml

@@ -0,0 +1,5 @@
+[general]
+board = "usbtiny"
+
+# For documentation about this file, check here:
+# https://github.com/Rahix/avr-hal/blob/main/ravedude/README.md#ravedudetoml-format

examples/usbtiny/src/bin/usbtiny-blink.rs

@@ -0,0 +1,19 @@
+#![no_std]
+#![no_main]
+
+use panic_halt as _;
+
+#[arduino_hal::entry]
+fn main() -> ! {
+    let dp = arduino_hal::Peripherals::take().unwrap();
+    let pins = arduino_hal::pins!(dp);
+
+    // Digital pin 1 is also connected to an onboard LED marked "L"
+    let mut led = pins.d1.into_output();
+    led.set_high();
+
+    loop {
+        led.toggle();
+        arduino_hal::delay_ms(100);
+    }
+}

examples/usbtiny/src/bin/usbtiny-custom-clock.rs

@@ -0,0 +1,24 @@
+#![no_std]
+#![no_main]
+
+use arduino_hal::clock::MHz8;
+use arduino_hal::hal::delay::Delay;
+use embedded_hal::delay::DelayNs;
+use panic_halt as _;
+
+
+#[arduino_hal::entry]
+fn main() -> ! {
+
+    let dp = arduino_hal::Peripherals::take().unwrap();
+    let pins: arduino_hal::Pins = arduino_hal::pins!(dp);
+
+
+    let mut led = pins.d1.into_output();
+    let mut delay: Delay<MHz8> = Delay::new();
+
+    loop {
+        led.toggle();
+        delay.delay_ms(1);
+    }
+}

ravedude/src/boards.toml

@@ -282,3 +282,14 @@
     do-chip-erase = true
 
     # The AVR Butterfly does not have USB-Serial, thus no port is known or needed.
+[usbtiny]
+    name = "USBTiny"
+
+    [usbtiny.reset]
+    automatic = true
+
+    [usbtiny.avrdude]
+    programmer = "usbtiny"
+    partno = "attiny85"
+    baudrate = -1
+    do-chip-erase = true