From: Matt Mullins <mmullins@mmlx.us>
Date: Sun, 23 Dec 2012 04:07:06 +0000 (-0800)
Subject: Add some empty asm("") blocks to spin() to thwart optimizations
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=e55b62cd1735d3a636c1d8a06c8c51f39b3b60f3;p=stellaris%2Fled_blink.git

Add some empty asm("") blocks to spin() to thwart optimizations
---

diff --git a/led_blink.c b/led_blink.c
index 7d25e4e..14ee0d1 100644
--- a/led_blink.c
+++ b/led_blink.c
@@ -32,5 +32,9 @@ void main_isr() {
 }
 
 void spin(int cycles) {
-	while (cycles) { cycles -= 1; }
+	asm("");
+	while (cycles) {
+		cycles -= 1;
+		asm("");
+	}
 }