From 97adac62ea8f62b1de5e777889f309486e337dc3 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Wed, 7 Aug 2019 18:47:19 -0400
Subject: Add USB stuff.

---
 src/main.rs | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/main.rs b/src/main.rs
index 84bc3c0..a89ac07 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,8 @@ mod logger;
 mod macros;
 mod rtc;
 
+use atsamd_usb_host::SAMDHost;
+use bootkbd::BootKeyboard;
 use clint::HandlerArray;
 use core::mem;
 use core::panic::PanicInfo;
@@ -24,8 +26,7 @@ use trinket_m0::{
     time::*,
     CorePeripherals, Peripherals,
 };
-
-// I²C on trinket is on SERCOM2
+use usb_host::Driver;
 
 static mut LED: usize = 0;
 
@@ -104,19 +105,42 @@ fn main() -> ! {
 
     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();
+    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.");
 
         let mut last_tick = 0;
         loop {
             let tick = rtc::millis();
-            if tick > last_tick + 1024 {
+            if tick >= last_tick + 1000 {
                 last_tick = tick;
-                i2c_master.write(NRF_WIREADDR, b"!").expect("writing i2c");
+                let t: [u8; 4] = unsafe { core::mem::transmute(tick) };
+                i2c_master.write(NRF_WIREADDR, &t).ok();
             }
+
+            usb_host.task(&mut drivers[..]);
             wfi()
         }
     });
-- 
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