From 7fdc6a2c1b5799221f5d89d5f935cfe7dad4ccd2 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Sun, 11 Aug 2019 19:01:34 -0400
Subject: Move usb controller stuff to usb directory.

---
 src/rtc.rs | 75 --------------------------------------------------------------
 1 file changed, 75 deletions(-)
 delete mode 100644 src/rtc.rs

(limited to 'src/rtc.rs')

diff --git a/src/rtc.rs b/src/rtc.rs
deleted file mode 100644
index fa7b347..0000000
--- a/src/rtc.rs
+++ /dev/null
@@ -1,75 +0,0 @@
-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();
-    }
-}
-- 
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