Move usb controller stuff to usb directory.

10 files changed, 1013 insertions, 0 deletions

diff --git a/usb/.cargo/config b/usb/.cargo/config
new file mode 100644
index 0000000..b10f29d
--- /dev/null
+++ b/usb/.cargo/config
@@ -0,0 +1,2 @@
+[build]
+target = "thumbv6m-none-eabi"
diff --git a/usb/Cargo.lock b/usb/Cargo.lock
new file mode 100644
index 0000000..99b87a9
--- /dev/null
+++ b/usb/Cargo.lock
@@ -0,0 +1,437 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "aligned"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "aligned"
+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 = "apa102-spi"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smart-leds-trait 0.2.0 (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 = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "atsamd21e18a 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.10 (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)",
+ "paste 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atsamd-hal"
+version = "0.6.0"
+dependencies = [
+ "atsamd21e18a 0.5.0",
+ "bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.10 (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)",
+ "paste 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atsamd-usb-host"
+version = "0.1.0"
+dependencies = [
+ "atsamd-hal 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "starb 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "usb-host 0.1.1",
+]
+
+[[package]]
+name = "atsamd21e18a"
+version = "0.4.0"
+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 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atsamd21e18a"
+version = "0.5.0"
+dependencies = [
+ "bare-metal 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.10 (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 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bare-metal"
+version = "0.2.4"
+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)",
+]
+
+[[package]]
+name = "bitfield"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bleusb"
+version = "0.1.0"
+dependencies = [
+ "apa102-spi 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atsamd-usb-host 0.1.0",
+ "bootkbd 0.2.0",
+ "clint 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.6.0 (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)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smart-leds 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smart-leds-trait 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "starb 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "trinket_m0 0.4.0",
+ "usb-host 0.1.1",
+]
+
+[[package]]
+name = "bootkbd"
+version = "0.2.0"
+dependencies = [
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "usb-host 0.1.1",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "clint"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cortex-m 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cortex-m"
+version = "0.5.10"
+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)",
+ "cortex-m 0.6.0 (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"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aligned 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bare-metal 0.2.4 (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 = "0.6.10"
+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)",
+ "r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cortex-m-rt-macros"
+version = "0.1.5"
+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)",
+ "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 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "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 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "nb"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "paste"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "paste-impl 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "paste-impl"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro-hack 0.5.8 (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)",
+ "syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.8"
+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)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+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 = "0.6.13"
+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 = "r0"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rand"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rgb"
+version = "0.8.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "smart-leds"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "smart-leds-trait 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "smart-leds-trait"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rgb 0.8.13 (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 = "starb"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "syn"
+version = "0.15.42"
+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)",
+ "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 = "trinket_m0"
+version = "0.4.0"
+dependencies = [
+ "atsamd-hal 0.6.0",
+ "cortex-m 0.5.10 (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 = "typenum"
+version = "1.10.0"
+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 = "usb-host"
+version = "0.1.1"
+
+[[package]]
+name = "vcell"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+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)",
+]
+
+[metadata]
+"checksum aligned 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d39da9b88ae1a81c03c9c082b8db83f1d0e93914126041962af61034ab44c4a5"
+"checksum aligned 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d3a316c7ea8e1e9ece54862c992def5a7ac14de9f5832b69d71760680efeeefa"
+"checksum apa102-spi 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "244c305e53cabeadfce23409fe24bfcedaa20166aa3f16f6c4ab256302158fd5"
+"checksum as-slice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "293dac66b274fab06f95e7efb05ec439a6b70136081ea522d270bc351ae5bb27"
+"checksum atsamd-hal 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9affce3b8d443195536c0b398a55a152cc962366c24824ea833bb22afd49b3d6"
+"checksum atsamd21e18a 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "139787a30d118dd09a2e9570f5404cf582b70afe9b53dd1194239f9be382b897"
+"checksum bare-metal 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a3caf393d93b2d453e80638d0674597020cef3382ada454faacd43d1a55a735a"
+"checksum bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)" = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
+"checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
+"checksum clint 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "200296af81a4cbe7da52afd9e5c35b7782eca865678caf2280251b777c9c37aa"
+"checksum cortex-m 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)" = "3c0b159a1e8306949579de3698c841dba58058197b65c60807194e4fa1e7a554"
+"checksum cortex-m 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f3c18719fdc57db65668bfc977db9a0fa1a41d718c5d9cd4f652c9d4b0e0956a"
+"checksum cortex-m-rt 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "17805910e3ecf029bdbfcc42b7384d9e3d9e5626153fa810002c1ef9839338ac"
+"checksum cortex-m-rt-macros 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "d7ae692573e0acccb1579fef1abf5a5bf1d2f3f0149a22b16870ec9309aee25f"
+"checksum embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ee4908a155094da7723c2d60d617b820061e3b4efcc3d9e293d206a5a76c170b"
+"checksum generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+"checksum nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b1411551beb3c11dedfb0a90a0fa256b47d28b9ec2cdff34c25a2fa59e45dbdc"
+"checksum paste 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "1f4a4a1c555c6505821f9d58b8779d0f630a6b7e4e1be24ba718610acf01fa79"
+"checksum paste-impl 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "26e796e623b8b257215f27e6c80a5478856cae305f5b59810ff9acdaa34570e6"
+"checksum proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)" = "982a35d1194084ba319d65c4a68d24ca28f5fdb5b8bc20899e4eef8641ea5178"
+"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
+"checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
+"checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
+"checksum rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c618c47cd3ebd209790115ab837de41425723956ad3ce2e6a7f09890947cacb9"
+"checksum rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+"checksum rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
+"checksum rgb 0.8.13 (registry+https://github.com/rust-lang/crates.io-index)" = "4f089652ca87f5a82a62935ec6172a534066c7b97be003cc8f702ee9a7a59c92"
+"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+"checksum smart-leds 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ab0a30e934e60850bfc020d4c2727cc8a3635371f6af2cb3f55f36f0134ed080"
+"checksum smart-leds-trait 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fef18e60d41a6fde19e640cd7590c03fb27aa23146bf60e4da85028d7410cee7"
+"checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
+"checksum starb 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "36de9f301031f2a692afe144c8a757950d2b60b7fbf447055b8e19a9c232fb2c"
+"checksum syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)" = "eadc09306ca51a40555dd6fc2b415538e9e18bc9f870e47b1a524a79fe2dcf5e"
+"checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
+"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "45c297f0afb6928cd08ab1ff9d95e99392595ea25ae1b5ecf822ff8764e57a0d"
+"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+"checksum volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
diff --git a/usb/Cargo.toml b/usb/Cargo.toml
new file mode 100644
index 0000000..a1978dd
--- /dev/null
+++ b/usb/Cargo.toml
@@ -0,0 +1,36 @@
+[package]
+name = "bleusb"
+description = "Send boot keyboard reports over I²C."
+version = "0.1.0"
+authors = ["Brian Cully <bjc@kublai.com>"]
+edition = "2018"
+license = "GPL-3.0-or-later"
+repository = "https://github.com/bjc/bleusb.git"
+
+[dependencies]
+embedded-hal = "0.2"
+trinket_m0 = "0.4"
+log = "0.4"
+starb = "0.1"
+clint = "0.2"
+nb = "0.1"
+cortex-m = "0.6"
+cortex-m-rt = "0.6"
+smart-leds-trait = "0.2"
+smart-leds = "0.2"
+apa102-spi = "0.2"
+usb-host = "0.1"
+bootkbd = "0.2"
+#atsamd-usb-host = { git = "https://github.com/bjc/atsamd-usb-host.git", rev = "385efdf53fa3fe38591f22d01edf75d3087c2326" }
+atsamd-usb-host = { path = "../../usbh/atsamd-usb-host" }
+
+[patch.crates-io]
+#bootkbd = { git = "https://github.com/bjc/bootkbd.git", rev = "49827fce5adbaf636b893919f31c0dbd97bb3eb4" }
+#usb-host = { git = "https://github.com/bjc/usb-host.git", rev = "b0be48424e81384de3280b5a5ac521d694b82e15" }
+#trinket_m0 = { git = "https://github.com/atsamd-rs/atsamd.git", rev = "53f8d846e40715c8592d171d9a57b66ee303207a" }
+trinket_m0 = { path = "../../usbh/atsamd/boards/trinket_m0" }
+bootkbd = { path = "../../usbh/bootkbd" }
+usb-host = { path = "../../usbh/usb-host" }
+
+[features]
+default = ["atsamd-usb-host/samd21e18a"]
diff --git a/usb/Makefile b/usb/Makefile
new file mode 100644
index 0000000..6d420d1
--- /dev/null
+++ b/usb/Makefile
@@ -0,0 +1,55 @@
+# How to compile the examples.
+APP = bleusb
+RELEASE = debug
+TARGET = thumbv6m-none-eabi
+
+# VID and PID of device to flash firmware to.
+USBVID = 239a
+USBPID = '001e|801e'
+
+BOSSAC = bossac
+OFFSET = 0x2000
+
+OBJCOPY = arm-none-eabi-objcopy
+
+TARGETDIR = target/$(TARGET)
+OUTDIR = $(TARGETDIR)/$(RELEASE)
+
+CARGOFLAGS = --target thumbv6m-none-eabi
+
+.PHONY: all clean cargo-build $(OUTDIR)/$(APP)
+
+all: $(OUTDIR)/$(APP)
+
+clean:
+	rm -f $(APP).uf2
+	rm -f $(APP).bin
+	cargo clean
+
+test:
+	cargo test
+
+cargo-build:
+	cargo rustc $(CARGOFLAGS) -- -C link-arg=-Tlink.x
+
+$(OUTDIR)/$(APP): cargo-build
+
+flash: $(APP).bin
+	feather-cmd r
+	sleep 2
+	feather-cmd dfu
+	sleep 2
+	$(BOSSAC) -R -e -w -v -o$(OFFSET) -p`./find-serial-port $(USBVID) $(USBPID)` $<
+
+qemu: $(OUTDIR)/$(APP)
+	qemu-system-arm -d in_asm,int,exec,cpu,guest_errors,unimp -pidfile qemu.pid -cpu cortex-m0 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -s -S -kernel $<
+
+gdb: $(OUTDIR)/$(APP)
+	gdb-multiarch -ex "target remote localhost:1234" -ex "break main" -ex "continue" $<
+
+%.bin: $(OUTDIR)/%
+	$(OBJCOPY) -O binary $< $@
+
+# Requires https://github.com/sajattack/uf2conv-rs.git
+%.uf2: %.bin
+	uf2conv-rs $< --base $(OFFSET) --output $@
diff --git a/usb/find-serial-port b/usb/find-serial-port
new file mode 100755
index 0000000..62e2c0c
--- /dev/null
+++ b/usb/find-serial-port
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+if [ $# -ne 2 ]; then
+    echo "Usage: $0 vid pid" >&2
+    exit 1
+fi
+
+prefix=/dev/serial/by-id
+
+for dev in `ls $prefix`; do
+    if [ `udevadm info -q property --name $prefix/$dev | egrep -i "ID_VENDOR_ID=($1)|ID_MODEL_ID=($2)" | wc -l` -eq 2 ]; then
+        echo `readlink -f $prefix/$dev`
+        exit 0
+    fi
+done
+exit 2
diff --git a/usb/src/dotstar.rs b/usb/src/dotstar.rs
new file mode 100644
index 0000000..8e930d0
--- /dev/null
+++ b/usb/src/dotstar.rs
@@ -0,0 +1,42 @@
+use trinket_m0::{
+    clock::GenericClockController,
+    gpio::{self, Floating, Input},
+    prelude::*,
+    sercom::{self, PadPin, SPIMaster1},
+    PM, SERCOM1,
+};
+
+use apa102_spi::Apa102;
+
+pub fn new(
+    sercom: SERCOM1,
+    miso: gpio::Pa31<Input<Floating>>,
+    mosi: gpio::Pa0<Input<Floating>>,
+    sck: gpio::Pa1<Input<Floating>>,
+    port: &mut gpio::Port,
+    pm: &mut PM,
+    clocks: &mut GenericClockController,
+) -> Apa102<
+    SPIMaster1<
+        sercom::Sercom1Pad3<gpio::Pa31<gpio::PfD>>,
+        sercom::Sercom1Pad0<gpio::Pa0<gpio::PfD>>,
+        sercom::Sercom1Pad1<gpio::Pa1<gpio::PfD>>,
+    >,
+> {
+    let gclk = clocks.gclk0();
+    let miso = miso.into_pad(port);
+    let mosi = mosi.into_pad(port);
+    let sck = sck.into_pad(port);
+    let spi = SPIMaster1::new(
+        &clocks
+            .sercom1_core(&gclk)
+            .expect("setting up sercom1 clock"),
+        3.mhz(),
+        apa102_spi::MODE,
+        sercom,
+        pm,
+        (miso, mosi, sck),
+    );
+
+    Apa102::new(spi)
+}
diff --git a/usb/src/logger.rs b/usb/src/logger.rs
new file mode 100644
index 0000000..be9d391
--- /dev/null
+++ b/usb/src/logger.rs
@@ -0,0 +1,139 @@
+use crate::rtc;
+use starb::{Reader, RingBuffer, Writer};
+
+use core::cell::UnsafeCell;
+use core::fmt::{self, Write};
+use embedded_hal::{digital::v2::OutputPin, serial};
+use log::{Metadata, Record};
+use trinket_m0::{
+    gpio::{Pa6, Pa7, PfD},
+    sercom::{Sercom0Pad2, Sercom0Pad3, UART0},
+};
+
+static mut UART0: usize = 0;
+
+struct JoinedRingBuffer<'a> {
+    lbr: Reader<'a, u8>,
+    lbw: Writer<'a, u8>,
+}
+
+impl<'a> JoinedRingBuffer<'a> {
+    const fn new(rb: &'a RingBuffer<u8>) -> Self {
+        let (lbr, lbw) = rb.split();
+        Self { lbr: lbr, lbw: lbw }
+    }
+}
+
+impl fmt::Write for JoinedRingBuffer<'_> {
+    fn write_str(&mut self, s: &str) -> Result<(), fmt::Error> {
+        for b in s.bytes() {
+            if let Err(_) = self.lbw.unshift(b) {
+                // Ignore buffer full errors for logging.
+                return Ok(());
+            }
+        }
+        Ok(())
+    }
+}
+
+static mut LB: RingBuffer<u8> = RingBuffer::<u8>::new(0);
+static mut JRB: JoinedRingBuffer = unsafe { JoinedRingBuffer::new(&LB) };
+
+// The UART isn't necessarily Sync, so wrap it in something that
+// is. As long as flush() is only called from one thread, we're fine,
+// but this is a guarantee that the logger module doesn't make.
+pub struct WriteWrapper<W> {
+    w: W,
+}
+impl<W> WriteWrapper<W>
+where
+    W: serial::Write<u8>,
+{
+    pub fn new(writer: W) -> Self {
+        Self { w: writer }
+    }
+}
+unsafe impl<W> Sync for WriteWrapper<W> {}
+
+pub struct SerialLogger<W, L> {
+    writer: UnsafeCell<WriteWrapper<W>>,
+    led: UnsafeCell<L>,
+}
+
+impl<W, L> SerialLogger<W, L>
+where
+    W: serial::Write<u8>,
+    L: OutputPin + Send + Sync,
+{
+    pub fn new(writer: WriteWrapper<W>, led: L) -> Self {
+        // Stash this for unsafe usage in case there's an issue with
+        // the rest of the logging.
+        unsafe { UART0 = core::mem::transmute(&writer.w) };
+        Self {
+            writer: UnsafeCell::new(writer),
+            led: UnsafeCell::new(led),
+        }
+    }
+}
+unsafe impl<W, L> Send for SerialLogger<W, L> {}
+unsafe impl<W, L> Sync for SerialLogger<W, L> {}
+
+impl<W, L> log::Log for SerialLogger<W, L>
+where
+    W: serial::Write<u8>,
+    L: OutputPin + Send + Sync,
+{
+    fn enabled(&self, metadata: &Metadata) -> bool {
+        metadata.level() <= log::max_level()
+    }
+
+    fn log(&self, record: &Record) {
+        if !self.enabled(record.metadata()) {
+            return;
+        }
+
+        let jrb = unsafe { &mut JRB };
+        write!(
+            jrb,
+            "[{}] {} {} -- {}\r\n",
+            rtc::millis(),
+            record.level(),
+            record.target(),
+            record.args()
+        )
+        .ok();
+    }
+
+    fn flush(&self) {
+        // Unsafe due to mutable static. We can only deal with the
+        // tail position of the buffer here to keep things safe.
+        let jrb = unsafe { &mut JRB };
+        if jrb.lbr.is_empty() {
+            return;
+        }
+
+        let led = unsafe { &mut (*self.led.get()) };
+        let writer = unsafe { &mut (*self.writer.get()) };
+
+        led.set_high().ok();
+        while let Some(b) = jrb.lbr.shift() {
+            nb::block!(writer.w.write(b)).ok();
+        }
+        led.set_low().ok();
+    }
+}
+
+// Write to the UART right now, instead of putting it on a ring
+// buffer. This function is a huge hack, and only useful for debugging
+// either before the main loop starts or if the ring buffer is broken.
+pub unsafe fn write_fmt_now(args: fmt::Arguments, nl: bool) {
+    if UART0 == 0 {
+        return;
+    }
+    let uart: &mut UART0<Sercom0Pad3<Pa7<PfD>>, Sercom0Pad2<Pa6<PfD>>, (), ()> =
+        core::mem::transmute(UART0);
+    fmt::write(uart, args).expect("writing fmt now to uart");
+    if nl {
+        uart.write_str("\r\n").expect("writing nl now to uart");
+    }
+}
diff --git a/usb/src/macros.rs b/usb/src/macros.rs
new file mode 100644
index 0000000..46d2d07
--- /dev/null
+++ b/usb/src/macros.rs
@@ -0,0 +1,15 @@
+#[macro_export]
+macro_rules! logln_now {
+    ($($arg:tt)*) => {
+        unsafe {crate::logger::write_fmt_now(format_args!($($arg)*), true);}
+    };
+    (_) => {};
+}
+
+#[macro_export]
+macro_rules! log_now {
+    ($($arg:tt)*) => {
+        unsafe {crate::logger::write_fmt_now(format_args!($($arg)*), false);}
+    };
+    (_) => {};
+}
diff --git a/usb/src/main.rs b/usb/src/main.rs
new file mode 100644
index 0000000..36e4d1e
--- /dev/null
+++ b/usb/src/main.rs
@@ -0,0 +1,196 @@
+//! Take USB keyboard reports and echo them over I²C.
+
+#![no_std]
+#![no_main]
+
+mod dotstar;
+mod logger;
+mod macros;
+mod rtc;
+
+use atsamd_usb_host::SAMDHost;
+use bootkbd::BootKeyboard;
+use clint::HandlerArray;
+use core::mem;
+use core::panic::PanicInfo;
+use cortex_m::asm::wfi;
+use cortex_m_rt::{entry, exception, ExceptionFrame};
+use embedded_hal::{blocking::i2c::Write, digital::v2::OutputPin};
+use log::{info, LevelFilter};
+use smart_leds::colors;
+use smart_leds_trait::SmartLedsWrite;
+use trinket_m0::{
+    self as hal,
+    clock::GenericClockController,
+    gpio::{OpenDrain, Output, Pa10, Pa6, Pa7, PfD},
+    sercom,
+    target_device::{interrupt, Interrupt},
+    time::*,
+    CorePeripherals, Peripherals,
+};
+use usb_host::Driver;
+
+// A very unsafe copy of an LED to turn on when things go really, really wrong.
+static mut LED: usize = 0;
+
+// I²C address to send keyboard reports to.
+const NRF_WIREADDR: u8 = 4;
+
+// Interrupt handler table.
+static HANDLERS: HandlerArray = HandlerArray::new();
+
+#[entry]
+fn main() -> ! {
+    let mut cp = CorePeripherals::take().expect("taking core peripherals");
+    let mut dp = Peripherals::take().expect("taking device peripherals");
+
+    let mut clocks = GenericClockController::with_internal_32kosc(
+        dp.GCLK,
+        &mut dp.PM,
+        &mut dp.SYSCTRL,
+        &mut dp.NVMCTRL,
+    );
+
+    let mut pins = hal::Pins::new(dp.PORT);
+
+    let uart = hal::uart(
+        &mut clocks,
+        115_200.hz(),
+        dp.SERCOM0,
+        &mut cp.NVIC,
+        &mut dp.PM,
+        pins.d3,
+        pins.d4,
+        &mut pins.port,
+    );
+
+    let mut i2c_master = hal::i2c_master(
+        &mut clocks,
+        400_000.hz(),
+        dp.SERCOM2,
+        &mut dp.PM,
+        pins.d0,
+        pins.d2,
+        &mut pins.port,
+    );
+
+    let mut red_led = pins.d13.into_open_drain_output(&mut pins.port);
+    red_led.set_low().expect("turning off red LED");
+    unsafe { LED = mem::transmute(&red_led) }
+
+    let mut dotstar = dotstar::new(
+        dp.SERCOM1,
+        pins.swdio,
+        pins.dotstar_di,
+        pins.dotstar_ci,
+        &mut pins.port,
+        &mut dp.PM,
+        &mut clocks,
+    );
+    let black = [colors::BLACK];
+    dotstar
+        .write(black.iter().cloned())
+        .expect("turning off dotstar");
+
+    // We do the transmute because, while all the underlying data is
+    // static, we're unable to get a referecence to the UART or LED
+    // until run-time. Another option would be to use Option in the
+    // SerialLogger definition, but that requires a check every time
+    // they might be used.
+    let uart_wrapped = logger::WriteWrapper::new(uart);
+    let logger = logger::SerialLogger::new(uart_wrapped, red_led);
+
+    // Wow, would I love to not be annotating this type.
+    let logger_ref: &'static logger::SerialLogger<
+        sercom::UART0<sercom::Sercom0Pad3<Pa7<PfD>>, sercom::Sercom0Pad2<Pa6<PfD>>, (), ()>,
+        Pa10<Output<OpenDrain>>,
+    > = unsafe { mem::transmute(&logger) };
+    unsafe { log::set_logger_racy(logger_ref).expect("couldn't set logger") };
+    log::set_max_level(LevelFilter::Trace);
+
+    let mut rtc_handler = rtc::setup(dp.RTC, &mut clocks);
+
+    let (mut usb_host, mut usb_handler) = SAMDHost::new(
+        dp.USB,
+        pins.usb_sof,
+        pins.usb_dm,
+        pins.usb_dp,
+        Some(pins.usb_host_enable),
+        &mut pins.port,
+        &mut clocks,
+        &mut dp.PM,
+        &rtc::millis,
+    );
+
+    let mut bootkbd = BootKeyboard::new(|addr, buf| {
+        info!("{}: {:?}", addr, buf);
+        let hdr: [u8; 2] = [I2CMessageType::Keyboard as u8, buf.len() as u8];
+        i2c_master.write(NRF_WIREADDR, &hdr).ok();
+        i2c_master.write(NRF_WIREADDR, &buf).ok();
+    });
+    let mut drivers: [&mut dyn Driver; 1] = [&mut bootkbd];
+
+    HANDLERS.with_overrides(|hs| {
+        hs.register(0, &mut rtc_handler);
+        unsafe { cp.NVIC.set_priority(Interrupt::USB, 0) };
+        cp.NVIC.enable(Interrupt::RTC);
+
+        hs.register(1, &mut usb_handler);
+        unsafe { cp.NVIC.set_priority(Interrupt::USB, 1) };
+        cp.NVIC.enable(Interrupt::USB);
+
+        info!("Bootstrap complete.");
+
+        loop {
+            usb_host.task(&mut drivers[..]);
+            wfi()
+        }
+    });
+    unreachable!();
+}
+
+#[allow(unused)]
+#[repr(u8)]
+enum I2CMessageType {
+    Debug = 0x00,
+    Keyboard = 0x01,
+    Invalid = 0xff,
+}
+
+#[panic_handler]
+fn panic_handler(pi: &PanicInfo) -> ! {
+    let red_led: &mut Pa10<Output<OpenDrain>> = unsafe { mem::transmute(LED) };
+    red_led.set_high().ok();
+
+    logln_now!("~~~ PANIC ~~~");
+    logln_now!("{}", pi);
+    logln_now!("flushing log");
+    loop {
+        log::logger().flush();
+        wfi()
+    }
+}
+
+#[exception]
+fn HardFault(ef: &ExceptionFrame) -> ! {
+    let red_led: &mut Pa10<Output<OpenDrain>> = unsafe { mem::transmute(LED) };
+    red_led.set_high().ok();
+
+    log::logger().flush();
+    logln_now!("!!! Hard Fault - ef: {:?} !!!", ef);
+    logln_now!("flushing log");
+    loop {
+        log::logger().flush();
+        wfi()
+    }
+}
+
+#[interrupt]
+fn RTC() {
+    HANDLERS.call(0);
+}
+
+#[interrupt]
+fn USB() {
+    HANDLERS.call(1);
+}
diff --git a/usb/src/rtc.rs b/usb/src/rtc.rs
new file mode 100644
index 0000000..fa7b347
--- /dev/null
+++ b/usb/src/rtc.rs
@@ -0,0 +1,75 @@
+use core::sync::atomic::{AtomicUsize, Ordering};
+use log;
+use trinket_m0::{clock::GenericClockController, RTC};
+
+struct Clock(AtomicUsize);
+impl Clock {
+    const fn new() -> Self {
+        Self(AtomicUsize::new(0))
+    }
+
+    fn set(&self, millis: usize) {
+        self.0.store(millis, Ordering::SeqCst)
+    }
+
+    // Slightly less than 1ms, due to using a 32,768Hz clock, we can't
+    // hit exactly 1ms, so we shoot for a bit under.
+    fn millis(&self) -> usize {
+        self.0.load(Ordering::SeqCst)
+    }
+}
+
+static CLOCK: Clock = Clock::new();
+
+// Set to run every ~500µs. This has been loosely calibrated from a
+// nrf52 clock running Arduino and a Linux host.
+static COUNTER: u32 = 13;
+
+pub fn setup(mut rtc: RTC, clocks: &mut GenericClockController) -> impl FnMut() {
+    let rtc_clock = &clocks.gclk1();
+    clocks.rtc(&rtc_clock);
+
+    rtc.mode0().ctrl.write(|w| w.swrst().set_bit());
+    while rtc.mode0().status.read().syncbusy().bit_is_set() {}
+
+    rtc.mode0().ctrl.write(|w| {
+        w.mode().count32();
+
+        // Neither the prescaler nor matchlr values seem to work. Not
+        // sure why.
+        //w.prescaler().div1024();
+        w.matchclr().set_bit() // Reset on match for periodic
+    });
+
+    rtc.mode0().comp[0].write(|w| unsafe { w.bits(COUNTER) });
+    rtc.mode0().intflag.write(|w| w.cmp0().set_bit());
+    rtc.mode0().intenset.write(|w| w.cmp0().set_bit());
+
+    // Enable the RTC and wait for sync.
+    rtc.mode0().ctrl.write(|w| w.enable().set_bit());
+    while rtc.mode0().status.read().syncbusy().bit_is_set() {}
+
+    move || handler(&mut rtc)
+}
+
+pub fn millis() -> usize {
+    CLOCK.millis()
+}
+
+fn handler(rtc: &mut RTC) {
+    // FIXME: matchclr doesn't seem to work to reset the counter?
+    rtc.mode0().count.write(|w| unsafe { w.bits(0) });
+    rtc.mode0().intflag.write(|w| w.cmp0().set_bit());
+
+    static mut TICKS: usize = 0;
+    static mut ADD: bool = false;
+    unsafe {
+        if ADD {
+            TICKS += 1;
+            CLOCK.set(TICKS);
+        }
+        ADD = !ADD;
+
+        log::logger().flush();
+    }
+}