diff --git a/hello_gradient/Cargo.lock b/hello_gradient/Cargo.lock
index 97a1527..b44b77c 100644
--- a/hello_gradient/Cargo.lock
+++ b/hello_gradient/Cargo.lock
@@ -2,38 +2,51 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aligned"
-version = "0.2.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "as-slice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "as-slice"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "atsamd-hal"
-version = "0.4.1"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "atsamd21g18a 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitfield 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "embedded-hal 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "paste 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atsamd21g18a 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "paste 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "atsamd21g18a"
-version = "0.4.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bare-metal 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m-rt 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bare-metal 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bare-metal"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -41,22 +54,22 @@ dependencies = [
 
 [[package]]
 name = "bitfield"
-version = "0.13.1"
+version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cortex-m"
-version = "0.5.8"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "aligned 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bare-metal 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aligned 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bare-metal 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cortex-m-rt"
-version = "0.6.7"
+version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cortex-m-rt-macros 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -68,21 +81,29 @@ name = "cortex-m-rt-macros"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "embedded-hal"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "hello_gradient"
 version = "0.1.0"
@@ -93,23 +114,24 @@ dependencies = [
 
 [[package]]
 name = "itsybitsy_m0"
-version = "0.2.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "atsamd-hal 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m-rt 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "embedded-hal 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atsamd-hal 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "itsybitsy_m0_lights"
 version = "0.1.0"
 dependencies = [
- "cortex-m 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "embedded-hal 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itsybitsy_m0 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atsamd21g18a 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itsybitsy_m0 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lights 0.1.0",
  "panic-halt 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -120,7 +142,7 @@ version = "0.1.0"
 
 [[package]]
 name = "nb"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -130,48 +152,64 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "paste"
-version = "0.1.4"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "paste-impl 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro-hack 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "paste-impl 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "paste-impl"
-version = "0.1.4"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro-hack 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.4"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.27"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "quote"
-version = "0.6.11"
+name = "proc-macro2"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "0.6.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -192,12 +230,17 @@ name = "rand_core"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.4.0"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -221,24 +264,49 @@ name = "semver-parser"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "syn"
-version = "0.15.28"
+version = "0.15.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "syn"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "typenum"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "vcell"
-version = "0.1.0"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -251,36 +319,45 @@ name = "volatile-register"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
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diff --git a/itsybitsy_m0_lights/Cargo.toml b/itsybitsy_m0_lights/Cargo.toml
index 8a2e340..263b783 100644
--- a/itsybitsy_m0_lights/Cargo.toml
+++ b/itsybitsy_m0_lights/Cargo.toml
@@ -5,8 +5,9 @@ authors = ["Tangent 128 <Tangent128@gmail.com>"]
 edition = "2018"
 
 [dependencies]
-cortex-m = { version = "0.5.8", features = ["inline-asm"] }
-embedded-hal = "0.2.2"
-itsybitsy_m0 = "0.2.1"
+atsamd21g18a = "0.6.0"
+cortex-m = { version = "0.6.1", features = ["inline-asm"] }
+embedded-hal = "0.2.3"
+itsybitsy_m0 = "0.5.0"
 lights = { path = "../lights" }
 panic-halt = "0.2"
diff --git a/itsybitsy_m0_lights/src/lib.rs b/itsybitsy_m0_lights/src/lib.rs
index 938dc0f..bc081b0 100644
--- a/itsybitsy_m0_lights/src/lib.rs
+++ b/itsybitsy_m0_lights/src/lib.rs
@@ -8,18 +8,20 @@ extern crate panic_halt;
 pub use cortex_m::asm::delay;
 pub use hal::entry;
 
+use atsamd21g18a::{
+    Peripherals
+};
 use core::u8;
-use embedded_hal::digital::OutputPin;
+use embedded_hal::digital::v2::OutputPin;
 use hal::{
     clock::GenericClockController,
-    Peripherals
 };
 use lights::{
     HardwareRgb,
     Lights
 };
 
-pub fn boot() -> impl Lights<Pixel = HardwareRgb> {
+pub fn boot() -> NeopixelLights<impl OutputPin, impl OutputPin> {
     let mut peripherals = Peripherals::take().unwrap();
     let _clock = GenericClockController::with_internal_32kosc(
         peripherals.GCLK,
@@ -38,10 +40,10 @@ pub fn boot() -> impl Lights<Pixel = HardwareRgb> {
 
 // WS2815 lighting times
 // approx. 20ns per clock cycle;
-const ZERO_HIGH_CYCLES: u32 = 8; // about 160ns
-const ZERO_LOW_CYCLES: u32 = 42; // about 840ns
-const ONE_HIGH_CYCLES: u32 = 35; // about 700ns
-const ONE_LOW_CYCLES: u32 = 15; // about 300ns
+const ZERO_HIGH_CYCLES: u32 = 11; // about 220ns
+const ONE_HIGH_CYCLES: u32 = 29; // about 580ns
+const ZERO_LOW_CYCLES: u32 = 29; // about 580ns
+const ONE_LOW_CYCLES: u32 = 11; // about 220ns
 const LATCH_CYCLES: u32 = 15000; // about 300us
 
 pub struct NeopixelLights<T: OutputPin, U: OutputPin> {
@@ -52,11 +54,11 @@ pub struct NeopixelLights<T: OutputPin, U: OutputPin> {
 impl<T: OutputPin, U: OutputPin> NeopixelLights<T, U> {
     #[inline]
     fn write(&mut self, bit: bool) {
-        self.out.set_high();
-        self.high_out.set_high();
+        self.out.set_high().ok();
+        self.high_out.set_high().ok();
         delay(if bit { ONE_HIGH_CYCLES } else { ZERO_HIGH_CYCLES });
-        self.out.set_low();
-        self.high_out.set_low();
+        self.out.set_low().ok();
+        self.high_out.set_low().ok();
         delay(if bit { ONE_LOW_CYCLES } else { ZERO_LOW_CYCLES });
     }