From c20e974373e9daeb81278794bc73033b88eb756c Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Tue, 30 Jul 2019 09:45:40 -0400
Subject: Update dotstar with interrupts disabled.

Output is more solid now, but still flickers badly with heavy serial.
---
 app/src/main.rs | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/app/src/main.rs b/app/src/main.rs
index d091a9e..ded4dac 100755
--- a/app/src/main.rs
+++ b/app/src/main.rs
@@ -123,9 +123,11 @@ fn main() -> ! {
 
         let mut last_tick = 0;
         loop {
-            dotstar
-                .write(black.iter().cloned())
-                .expect("turning off dotstar");
+            cortex_m::interrupt::free(|_cs| {
+                dotstar
+                    .write(black.iter().cloned())
+                    .expect("turning off dotstar");
+            });
 
             let tick = rtc::millis();
             if tick >= last_tick + 1_024 {
@@ -135,9 +137,11 @@ fn main() -> ! {
 
             usb_host.task();
 
-            dotstar
-                .write(blue.iter().cloned())
-                .expect("turning on dotstar");
+            cortex_m::interrupt::free(|_cs| {
+                dotstar
+                    .write(blue.iter().cloned())
+                    .expect("turning on dotstar");
+            });
             wfi();
         }
     });
-- 
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