Merge branch 'delay-losing-time' of https://github.com/jcw/Arduino_STM32 into jcw-delay-losing-time

Author: rogerclarkmelbourne

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) {