Add basic support for Trinket M0 board

README.md

@@ -38,6 +38,9 @@ There are a couple of crates provided by this repo:
 * [`gemma_m0`](https://wez.github.io/atsamd21-rs/atsamd21e18a/gemma_m0/) is a board support crate
   for the Adafruit Gemma M0 board.  Similar to the Metro M0 crate, it re-exports the
   `atsamd21-hal` crate functionality using more convenient names.
+* [`trinket_m0`](https://wez.github.io/atsamd21-rs/atsamd21e18a/trinket_m0/) is a board support crate
+  for the Adafruit Trinket M0 board.  Similar to the Metro M0 crate, it re-exports the
+  `atsamd21-hal` crate functionality using more convenient names.
 * [`itsybitsy_m0`](https://wez.github.io/atsamd21-rs/atsamd21g18a/itsybitsy_m0/) is a board support crate
   for the Adafruit ItsyBitsy M0 board.  It re-exports the `atsamd21-hal` crate functionality
   using more convenient names; for example, the IO pins are exported using the labels

boards/trinket_m0/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "trinket_m0"
+version = "0.1.0"
+authors = ["Ben Bergman <ben@benbergman.ca>"]
+description = "Board Support crate for the Adafruit Trinket M0"
+keywords = ["no-std", "arm", "cortex-m", "embedded-hal"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/wez/atsamd21-rs"
+readme = "README.md"
+documentation = "https://wez.github.io/atsamd21-rs/atsamd21e18a/trinket_m0/"
+
+[dependencies]
+cortex-m = "~0.5"
+embedded-hal = "~0.2"
+nb = "~0.1"
+
+[dependencies.cortex-m-rt]
+version = "~0.6"
+optional = true
+
+[dependencies.atsamd21-hal]
+path = "../../hal"
+version = "~0.2"
+default-features = false
+
+[dev-dependencies]
+panic-abort = "~0.2"
+
+[features]
+# ask the HAL to enable atsamd21e18a support
+default = ["rt", "atsamd21-hal/samd21e18a"]
+rt = ["cortex-m-rt", "atsamd21-hal/samd21e18a-rt"]
+unproven = ["atsamd21-hal/unproven"]
+use_semihosting = []

boards/trinket_m0/README.md

@@ -0,0 +1,10 @@
+# Adafruit Trinket M0 Board Support Crate
+
+This crate provides a type-safe API for working with the [Adafruit Trinket M0
+board](https://www.adafruit.com/product/3501).
+
+## Examples?
+
+Check out the repository for examples:
+
+https://github.com/wez/atsamd21-rs/tree/master/boards/trinket_m0/examples

boards/trinket_m0/build.rs

@@ -0,0 +1,16 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+fn main() {
+    if env::var_os("CARGO_FEATURE_RT").is_some() {
+        let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+        File::create(out.join("memory.x"))
+            .unwrap()
+            .write_all(include_bytes!("memory.x"))
+            .unwrap();
+        println!("cargo:rustc-link-search={}", out.display());
+        println!("cargo:rerun-if-changed=memory.x");
+    }
+    println!("cargo:rerun-if-changed=build.rs");
+}

boards/trinket_m0/examples/blinky_basic.rs

@@ -0,0 +1,31 @@
+#![no_std]
+#![no_main]
+
+extern crate trinket_m0 as hal;
+extern crate panic_abort;
+
+use hal::clock::GenericClockController;
+use hal::delay::Delay;
+use hal::prelude::*;
+use hal::{entry, CorePeripherals, Peripherals};
+
+#[entry]
+fn main() -> ! {
+    let mut peripherals = Peripherals::take().unwrap();
+    let core = CorePeripherals::take().unwrap();
+    let mut clocks = GenericClockController::with_internal_32kosc(
+        peripherals.GCLK,
+        &mut peripherals.PM,
+        &mut peripherals.SYSCTRL,
+        &mut peripherals.NVMCTRL,
+    );
+    let mut pins = hal::Pins::new(peripherals.PORT);
+    let mut red_led = pins.d13.into_open_drain_output(&mut pins.port);
+    let mut delay = Delay::new(core.SYST, &mut clocks);
+    loop {
+        delay.delay_ms(200u8);
+        red_led.set_high();
+        delay.delay_ms(200u8);
+        red_led.set_low();
+    }
+}

boards/trinket_m0/memory.x

@@ -0,0 +1,8 @@
+MEMORY
+{
+  /* Leave 8k for the default bootloader on the Trinket M0 */
+  FLASH (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 256K - 8K
+  RAM (xrw)  : ORIGIN = 0x20000000, LENGTH = 32K
+}
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);
+

boards/trinket_m0/src/lib.rs

@@ -0,0 +1,45 @@
+#![no_std]
+#![recursion_limit="1024"]
+
+extern crate atsamd21_hal as hal;
+
+#[cfg(feature = "rt")]
+extern crate cortex_m_rt;
+#[cfg(feature = "rt")]
+pub use cortex_m_rt::entry;
+
+pub use hal::atsamd21e18a::*;
+use hal::prelude::*;
+pub use hal::*;
+
+use gpio::{Floating, Input, Port};
+
+define_pins!(
+    /// Maps the pins to their arduino names and
+    /// the numbers printed on the board.
+    struct Pins,
+    target_device: atsamd21e18a,
+
+    pin d0 = a8,
+    pin d1 = a2,
+    pin d2 = a9,
+    pin d3 = a7,
+    pin d4 = a6,
+
+    /// Digital pin number 13, which is also attached to
+    /// the red LED.  PWM capable.
+    pin d13 = a10,
+
+    /// The DotStar clock
+    pin dotstar_ci = a1,
+    /// The DotStar data line
+    pin dotstar_di = a0,
+
+    pin swdio = a31,
+    pin swdclk = a30,
+
+    /// The USB D- pad
+    pin usb_dm = a24,
+    /// The USB D+ pad
+    pin usb_dp = a25,
+);

build-all.sh

@@ -9,5 +9,6 @@ set -xe
 cargo build --manifest-path boards/metro_m0/Cargo.toml --example blinky_basic
 cargo build --manifest-path boards/gemma_m0/Cargo.toml --examples
 cargo build --manifest-path boards/itsybitsy_m0/Cargo.toml --examples
+cargo build --manifest-path boards/trinket_m0/Cargo.toml --examples
 cargo build --manifest-path boards/samd21_mini/Cargo.toml --examples
 cargo build --manifest-path boards/arduino_mkrzero/Cargo.toml --examples

build-docs.py

@@ -10,7 +10,7 @@
 # get enabled for the HAL module are different and we don't want to
 # emit misleading docs.
 crates_by_pac = {
-    'atsamd21e18a': ['gemma_m0'],
+    'atsamd21e18a': ['gemma_m0', 'trinket_m0'],
     'atsamd21g18a': ['metro_m0', 'samd21_mini', 'arduino_mkrzero', 'itsybitsy_m0']
 }