From 85eb51aacb3b6ceaf1575112cd363eb9d3a4649b Mon Sep 17 00:00:00 2001
From: Jean-Claude Wippler <jc@wippler.nl>
Date: Sat, 31 Oct 2015 16:25:42 +0100
Subject: [PATCH] wait for time to elapse instead of a cycle-counting loop

---
 STM32F1/cores/maple/wirish_time.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/STM32F1/cores/maple/wirish_time.cpp b/STM32F1/cores/maple/wirish_time.cpp
index 5faa1e4..08fd2d1 100644
--- a/STM32F1/cores/maple/wirish_time.cpp
+++ b/STM32F1/cores/maple/wirish_time.cpp
@@ -34,10 +34,9 @@
 #include <libmaple/delay.h>
 
 void delay(unsigned long ms) {
-    uint32 i;
-    for (i = 0; i < ms; i++) {
-        delayMicroseconds(1000);
-    }
+    uint32 start = millis();
+    while (millis() - start < ms)
+        ;
 }
 
 void delayMicroseconds(uint32 us) {