diff --git a/harrogate/Cargo.lock b/harrogate/Cargo.lock
index d122f09..fc18191 100644
--- a/harrogate/Cargo.lock
+++ b/harrogate/Cargo.lock
@@ -4,45 +4,57 @@ version = 3
 
 [[package]]
 name = "aligned"
-version = "0.3.1"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3a316c7ea8e1e9ece54862c992def5a7ac14de9f5832b69d71760680efeeefa"
+checksum = "c19796bd8d477f1a9d4ac2465b464a8b1359474f06a96bb3cda650b4fca309bf"
 dependencies = [
  "as-slice",
 ]
 
 [[package]]
-name = "as-slice"
-version = "0.1.0"
+name = "apa102-spi"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "293dac66b274fab06f95e7efb05ec439a6b70136081ea522d270bc351ae5bb27"
+checksum = "d92cd690fd2aae5bc549e2dc392d9082aab3ccf851aa39b0ab84b2934f4c57a3"
 dependencies = [
- "generic-array",
+ "embedded-hal",
+ "smart-leds-trait",
+]
+
+[[package]]
+name = "as-slice"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45403b49e3954a4b8428a0ac21a4b7afadccf92bfd96273f1a58cd4812496ae0"
+dependencies = [
+ "generic-array 0.12.4",
+ "generic-array 0.13.3",
+ "generic-array 0.14.4",
  "stable_deref_trait",
 ]
 
 [[package]]
 name = "atsamd-hal"
-version = "0.7.4"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9811af7fba403281be49cb14a8f3ba9083151fc305f00b04d0717dd41791a957"
+checksum = "868f22ff864d664efd9a0134cad0905d918f62f3b14d7761ca6d64bdcb1df96b"
 dependencies = [
- "atsamd21g18a",
+ "atsamd21g",
  "bitfield",
  "cortex-m 0.6.7",
  "embedded-hal",
- "nb",
+ "nb 0.1.3",
  "paste",
- "rand_core 0.5.1",
+ "rand_core",
  "vcell",
  "void",
 ]
 
 [[package]]
-name = "atsamd21g18a"
-version = "0.6.0"
+name = "atsamd21g"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5486b991ab0012b18f749e0b4bd71d882b4d6134dd58a1c16b571cf2e3d40eb"
+checksum = "1d4092551cf82644de22191ad79c734adbd88df8e2b861e7b614d7e7891c83c7"
 dependencies = [
  "bare-metal",
  "cortex-m 0.6.7",
@@ -59,12 +71,28 @@ dependencies = [
  "rustc_version",
 ]
 
+[[package]]
+name = "bitbang-hal"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "470e1522d257e4c76245980d27d5d279442cb18955cc6341249b904074033f4a"
+dependencies = [
+ "embedded-hal",
+ "nb 0.1.3",
+]
+
 [[package]]
 name = "bitfield"
 version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
 
+[[package]]
+name = "bytemuck"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9966d2ab714d0f785dbac0a0396251a35280aeb42413281617d0209ab4898435"
+
 [[package]]
 name = "cortex-m"
 version = "0.6.7"
@@ -92,9 +120,9 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt"
-version = "0.6.10"
+version = "0.6.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17805910e3ecf029bdbfcc42b7384d9e3d9e5626153fa810002c1ef9839338ac"
+checksum = "b6d8353767db816419630a76d5f1ad5b09610d22b67ceb59647df6a8abc667f8"
 dependencies = [
  "cortex-m-rt-macros",
  "r0",
@@ -102,35 +130,53 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt-macros"
-version = "0.1.5"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7ae692573e0acccb1579fef1abf5a5bf1d2f3f0149a22b16870ec9309aee25f"
+checksum = "4717562afbba06e760d34451919f5c3bf3ac15c7bb897e8b04862a7428378647"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "rand",
- "syn 0.15.44",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "embedded-hal"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa998ce59ec9765d15216393af37a58961ddcefb14c753b4816ba2191d865fcb"
+checksum = "db184d3fa27bc7a2344250394c0264144dfe0bc81a4401801dcb964b8dd172ad"
 dependencies = [
- "nb",
+ "nb 0.1.3",
  "void",
 ]
 
 [[package]]
 name = "generic-array"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+checksum = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
 dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f797e67af32588215eaaab8327027ee8e71b9dd0b2b26996aedf20c030fce309"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
+name = "generic-array"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "harrogate"
 version = "0.1.0"
@@ -151,22 +197,24 @@ dependencies = [
 
 [[package]]
 name = "itsybitsy_m0"
-version = "0.5.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f00eb09c5591b0d404f671bc87d9e39120d558ea74025d367b28bb61acc9b10"
+checksum = "5910604281fc0ab4d2cd7b1284443a1945615c99fde191baca60d6e097b2408c"
 dependencies = [
+ "apa102-spi",
  "atsamd-hal",
+ "bitbang-hal",
  "cortex-m 0.6.7",
  "cortex-m-rt",
  "embedded-hal",
- "nb",
+ "nb 0.1.3",
+ "smart-leds",
 ]
 
 [[package]]
 name = "itsybitsy_m0_lights"
 version = "0.1.0"
 dependencies = [
- "atsamd21g18a",
  "cortex-m 0.7.3",
  "embedded-hal",
  "itsybitsy_m0",
@@ -180,9 +228,18 @@ version = "0.1.0"
 
 [[package]]
 name = "nb"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1411551beb3c11dedfb0a90a0fa256b47d28b9ec2cdff34c25a2fa59e45dbdc"
+checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
+dependencies = [
+ "nb 1.0.0",
+]
+
+[[package]]
+name = "nb"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
 
 [[package]]
 name = "panic-halt"
@@ -192,71 +249,26 @@ checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
 
 [[package]]
 name = "paste"
-version = "0.1.6"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "423a519e1c6e828f1e73b720f9d9ed2fa643dce8a7737fb43235ce0b41eeaa49"
-dependencies = [
- "paste-impl",
- "proc-macro-hack",
-]
-
-[[package]]
-name = "paste-impl"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4214c9e912ef61bf42b81ba9a47e8aad1b2ffaf739ab162bf96d1e011f54e6c5"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "syn 1.0.5",
-]
-
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ecd45702f76d6d3c75a80564378ae228a85f0b59d2f3ed43c91b4a69eb2ebfc5"
-dependencies = [
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "syn 1.0.5",
-]
+checksum = "acbf547ad0c65e31259204bd90935776d1c693cec2f4ff7abb7a1bbbd40dfe58"
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.30"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
+checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
 dependencies = [
- "unicode-xid 0.1.0",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
-dependencies = [
- "unicode-xid 0.2.0",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "quote"
-version = "0.6.13"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
+checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
 dependencies = [
- "proc-macro2 0.4.30",
-]
-
-[[package]]
-name = "quote"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-dependencies = [
- "proc-macro2 1.0.6",
+ "proc-macro2",
 ]
 
 [[package]]
@@ -265,36 +277,21 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
 
-[[package]]
-name = "rand"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c618c47cd3ebd209790115ab837de41425723956ad3ce2e6a7f09890947cacb9"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-dependencies = [
- "rand_core 0.4.2",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
 [[package]]
 name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 
+[[package]]
+name = "rgb"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fddb3b23626145d1776addfc307e1a1851f60ef6ca64f376bcb889697144cf0"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -320,56 +317,63 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
-name = "stable_deref_trait"
-version = "1.1.1"
+name = "smart-leds"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
-
-[[package]]
-name = "syn"
-version = "0.15.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+checksum = "38dd45fa275f70b4110eac5f5182611ad384f88bb22b68b9a9c3cafd7015290b"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "unicode-xid 0.1.0",
+ "smart-leds-trait",
 ]
 
 [[package]]
-name = "syn"
-version = "1.0.5"
+name = "smart-leds-trait"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf"
+checksum = "ebf6d833fa93f16a1c1874e62c2aebe8567e5bdd436d59bf543ed258b6f7a8e3"
 dependencies = [
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "unicode-xid 0.2.0",
+ "rgb",
+]
+
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
+name = "syn"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f71489ff30030d2ae598524f61326b902466f72a0fb1a8564c001cc63425bcc7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "typenum"
-version = "1.11.2"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
+checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
 
 [[package]]
 name = "unicode-xid"
-version = "0.1.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-
-[[package]]
-name = "unicode-xid"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
 
 [[package]]
 name = "vcell"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "876e32dcadfe563a4289e994f7cb391197f362b6315dc45e8ba4aa6f564a4b3c"
+checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
+
+[[package]]
+name = "version_check"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
 [[package]]
 name = "void"
diff --git a/harrogate/Cargo.toml b/harrogate/Cargo.toml
index 8d26626..89fab8c 100644
--- a/harrogate/Cargo.toml
+++ b/harrogate/Cargo.toml
@@ -27,7 +27,7 @@ november-2020 = ["replace-default"]
 
 [dependencies]
 house = { path = "../house" }
-itsybitsy_m0 = "0.5"
+itsybitsy_m0 = "0.10"
 lights = { path = "../lights" }
 lights_hal = { path = "../itsybitsy_m0_lights", package = "itsybitsy_m0_lights" }
 panic-halt = "0.2"
diff --git a/hello_gradient/Cargo.lock b/hello_gradient/Cargo.lock
index 9d2bd82..8f6120d 100644
--- a/hello_gradient/Cargo.lock
+++ b/hello_gradient/Cargo.lock
@@ -11,6 +11,16 @@ dependencies = [
  "as-slice",
 ]
 
+[[package]]
+name = "apa102-spi"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d92cd690fd2aae5bc549e2dc392d9082aab3ccf851aa39b0ab84b2934f4c57a3"
+dependencies = [
+ "embedded-hal",
+ "smart-leds-trait",
+]
+
 [[package]]
 name = "as-slice"
 version = "0.1.0"
@@ -31,13 +41,42 @@ dependencies = [
  "bitfield",
  "cortex-m 0.6.7",
  "embedded-hal",
- "nb",
- "paste",
- "rand_core 0.5.1",
+ "nb 0.1.3",
+ "paste 0.1.6",
+ "rand_core",
  "vcell",
  "void",
 ]
 
+[[package]]
+name = "atsamd-hal"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "868f22ff864d664efd9a0134cad0905d918f62f3b14d7761ca6d64bdcb1df96b"
+dependencies = [
+ "atsamd21g",
+ "bitfield",
+ "cortex-m 0.6.7",
+ "embedded-hal",
+ "nb 0.1.3",
+ "paste 1.0.5",
+ "rand_core",
+ "vcell",
+ "void",
+]
+
+[[package]]
+name = "atsamd21g"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d4092551cf82644de22191ad79c734adbd88df8e2b861e7b614d7e7891c83c7"
+dependencies = [
+ "bare-metal",
+ "cortex-m 0.6.7",
+ "cortex-m-rt",
+ "vcell",
+]
+
 [[package]]
 name = "atsamd21g18a"
 version = "0.6.0"
@@ -59,12 +98,28 @@ dependencies = [
  "rustc_version",
 ]
 
+[[package]]
+name = "bitbang-hal"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "470e1522d257e4c76245980d27d5d279442cb18955cc6341249b904074033f4a"
+dependencies = [
+ "embedded-hal",
+ "nb 0.1.3",
+]
+
 [[package]]
 name = "bitfield"
 version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
 
+[[package]]
+name = "bytemuck"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9966d2ab714d0f785dbac0a0396251a35280aeb42413281617d0209ab4898435"
+
 [[package]]
 name = "cortex-m"
 version = "0.6.7"
@@ -92,9 +147,9 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt"
-version = "0.6.10"
+version = "0.6.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17805910e3ecf029bdbfcc42b7384d9e3d9e5626153fa810002c1ef9839338ac"
+checksum = "b6d8353767db816419630a76d5f1ad5b09610d22b67ceb59647df6a8abc667f8"
 dependencies = [
  "cortex-m-rt-macros",
  "r0",
@@ -102,23 +157,22 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt-macros"
-version = "0.1.5"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7ae692573e0acccb1579fef1abf5a5bf1d2f3f0149a22b16870ec9309aee25f"
+checksum = "4717562afbba06e760d34451919f5c3bf3ac15c7bb897e8b04862a7428378647"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "rand",
- "syn 0.15.44",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
 name = "embedded-hal"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa998ce59ec9765d15216393af37a58961ddcefb14c753b4816ba2191d865fcb"
+checksum = "db184d3fa27bc7a2344250394c0264144dfe0bc81a4401801dcb964b8dd172ad"
 dependencies = [
- "nb",
+ "nb 0.1.3",
  "void",
 ]
 
@@ -136,7 +190,7 @@ name = "hello_gradient"
 version = "0.1.0"
 dependencies = [
  "house",
- "itsybitsy_m0",
+ "itsybitsy_m0 0.5.0",
  "itsybitsy_m0_lights",
  "lights",
  "panic-halt",
@@ -155,21 +209,36 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f00eb09c5591b0d404f671bc87d9e39120d558ea74025d367b28bb61acc9b10"
 dependencies = [
- "atsamd-hal",
+ "atsamd-hal 0.7.4",
  "cortex-m 0.6.7",
  "cortex-m-rt",
  "embedded-hal",
- "nb",
+ "nb 0.1.3",
+]
+
+[[package]]
+name = "itsybitsy_m0"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5910604281fc0ab4d2cd7b1284443a1945615c99fde191baca60d6e097b2408c"
+dependencies = [
+ "apa102-spi",
+ "atsamd-hal 0.12.0",
+ "bitbang-hal",
+ "cortex-m 0.6.7",
+ "cortex-m-rt",
+ "embedded-hal",
+ "nb 0.1.3",
+ "smart-leds",
 ]
 
 [[package]]
 name = "itsybitsy_m0_lights"
 version = "0.1.0"
 dependencies = [
- "atsamd21g18a",
  "cortex-m 0.7.3",
  "embedded-hal",
- "itsybitsy_m0",
+ "itsybitsy_m0 0.10.0",
  "lights",
  "panic-halt",
 ]
@@ -180,9 +249,18 @@ version = "0.1.0"
 
 [[package]]
 name = "nb"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1411551beb3c11dedfb0a90a0fa256b47d28b9ec2cdff34c25a2fa59e45dbdc"
+checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
+dependencies = [
+ "nb 1.0.0",
+]
+
+[[package]]
+name = "nb"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
 
 [[package]]
 name = "panic-halt"
@@ -200,6 +278,12 @@ dependencies = [
  "proc-macro-hack",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acbf547ad0c65e31259204bd90935776d1c693cec2f4ff7abb7a1bbbd40dfe58"
+
 [[package]]
 name = "paste-impl"
 version = "0.1.6"
@@ -207,9 +291,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4214c9e912ef61bf42b81ba9a47e8aad1b2ffaf739ab162bf96d1e011f54e6c5"
 dependencies = [
  "proc-macro-hack",
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "syn 1.0.5",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
@@ -218,18 +302,9 @@ version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ecd45702f76d6d3c75a80564378ae228a85f0b59d2f3ed43c91b4a69eb2ebfc5"
 dependencies = [
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "syn 1.0.5",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "0.4.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
-dependencies = [
- "unicode-xid 0.1.0",
+ "proc-macro2",
+ "quote",
+ "syn",
 ]
 
 [[package]]
@@ -238,16 +313,7 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
 dependencies = [
- "unicode-xid 0.2.0",
-]
-
-[[package]]
-name = "quote"
-version = "0.6.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
-dependencies = [
- "proc-macro2 0.4.30",
+ "unicode-xid",
 ]
 
 [[package]]
@@ -256,7 +322,7 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
 dependencies = [
- "proc-macro2 1.0.6",
+ "proc-macro2",
 ]
 
 [[package]]
@@ -265,36 +331,21 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
 
-[[package]]
-name = "rand"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c618c47cd3ebd209790115ab837de41425723956ad3ce2e6a7f09890947cacb9"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-dependencies = [
- "rand_core 0.4.2",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
 [[package]]
 name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 
+[[package]]
+name = "rgb"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fddb3b23626145d1776addfc307e1a1851f60ef6ca64f376bcb889697144cf0"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -319,32 +370,39 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "smart-leds"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38dd45fa275f70b4110eac5f5182611ad384f88bb22b68b9a9c3cafd7015290b"
+dependencies = [
+ "smart-leds-trait",
+]
+
+[[package]]
+name = "smart-leds-trait"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebf6d833fa93f16a1c1874e62c2aebe8567e5bdd436d59bf543ed258b6f7a8e3"
+dependencies = [
+ "rgb",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 
-[[package]]
-name = "syn"
-version = "0.15.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
-dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "unicode-xid 0.1.0",
-]
-
 [[package]]
 name = "syn"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf"
 dependencies = [
- "proc-macro2 1.0.6",
- "quote 1.0.2",
- "unicode-xid 0.2.0",
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
 ]
 
 [[package]]
@@ -353,12 +411,6 @@ version = "1.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
 
-[[package]]
-name = "unicode-xid"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-
 [[package]]
 name = "unicode-xid"
 version = "0.2.0"
diff --git a/itsybitsy_m0_lights/Cargo.toml b/itsybitsy_m0_lights/Cargo.toml
index 4c267f1..4a2ec9d 100644
--- a/itsybitsy_m0_lights/Cargo.toml
+++ b/itsybitsy_m0_lights/Cargo.toml
@@ -5,9 +5,8 @@ authors = ["Tangent 128 <Tangent128@gmail.com>"]
 edition = "2018"
 
 [dependencies]
-atsamd21g18a = "0.6.0"
 cortex-m = { version = "0.7.1" }
-embedded-hal = "0.2.3"
-itsybitsy_m0 = "0.5.0"
+embedded-hal = "0.2.5"
+itsybitsy_m0 = "0.10"
 lights = { path = "../lights" }
 panic-halt = "0.2"
diff --git a/itsybitsy_m0_lights/src/lib.rs b/itsybitsy_m0_lights/src/lib.rs
index 05a083f..0786634 100644
--- a/itsybitsy_m0_lights/src/lib.rs
+++ b/itsybitsy_m0_lights/src/lib.rs
@@ -8,27 +8,23 @@ extern crate panic_halt;
 pub use cortex_m::asm::delay;
 pub use hal::entry;
 
-use atsamd21g18a::{
-    Peripherals
-};
-use core::u8;
 use core::fmt::Debug;
+use core::u8;
 pub use embedded_hal::digital::v2::OutputPin;
-use hal::{
-    clock::GenericClockController,
-};
-use lights::{
-    HardwareRgb,
-    Lights
-};
+use hal::{clock::GenericClockController, pac::Peripherals};
+use lights::{HardwareRgb, Lights};
 
-pub fn boot() -> NeopixelLights<impl OutputPin<Error = ()>, impl OutputPin<Error = ()>, impl OutputPin<Error = ()>> {
+pub fn boot() -> NeopixelLights<
+    impl OutputPin<Error = ()>,
+    impl OutputPin<Error = ()>,
+    impl OutputPin<Error = ()>,
+> {
     let mut peripherals = Peripherals::take().unwrap();
     let _clock = GenericClockController::with_internal_32kosc(
         peripherals.GCLK,
         &mut peripherals.PM,
         &mut peripherals.SYSCTRL,
-        &mut peripherals.NVMCTRL
+        &mut peripherals.NVMCTRL,
     );
 
     let mut pins = hal::Pins::new(peripherals.PORT);
@@ -50,17 +46,17 @@ pub fn boot() -> NeopixelLights<impl OutputPin<Error = ()>, impl OutputPin<Error
 
 // experimentally, there is some unknown overhead
 // but these timings appear to work for me:
-const ZERO_HIGH_CYCLES: u32 = 11-8;
-const ONE_HIGH_CYCLES: u32 = 29-8;
-const ZERO_LOW_CYCLES: u32 = 29-8;
-const ONE_LOW_CYCLES: u32 = 11-8;
+const ZERO_HIGH_CYCLES: u32 = 11 - 8;
+const ONE_HIGH_CYCLES: u32 = 29 - 8;
+const ZERO_LOW_CYCLES: u32 = 29 - 8;
+const ONE_LOW_CYCLES: u32 = 11 - 8;
 const LATCH_CYCLES: u32 = 15000; // about 300us
 
 pub struct NeopixelLights<T: OutputPin, U: OutputPin, V: OutputPin> {
     pub out: T,
     pub high_out: U,
     pub red_led: V,
-    pub debug_light: bool
+    pub debug_light: bool,
 }
 
 impl<T: OutputPin, U: OutputPin, V: OutputPin> NeopixelLights<T, U, V>
@@ -72,7 +68,11 @@ where
     #[inline]
     pub fn write(&mut self, bit: bool) {
         self.high_out.set_high().unwrap();
-        delay(if bit { ONE_HIGH_CYCLES } else { ZERO_HIGH_CYCLES });
+        delay(if bit {
+            ONE_HIGH_CYCLES
+        } else {
+            ZERO_HIGH_CYCLES
+        });
         self.high_out.set_low().unwrap();
         delay(if bit { ONE_LOW_CYCLES } else { ZERO_LOW_CYCLES });
     }