1 files changed, 77 insertions, 0 deletions
diff --git a/wirish/time.c b/wirish/time.c
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+++ b/wirish/time.c
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+/* *****************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * ****************************************************************************/
+
+/**
+ *  @file time.c
+ *
+ *  @brief 
+ */
+
+#include "libmaple.h"
+#include "systick.h"
+#include "time.h"
+
+#define CYCLES_PER_MICROSECOND  72
+#define FUDGE                   42
+
+extern volatile uint32 systick_timer_millis;
+
+uint32 millis() {
+   unsigned long m;
+   m = systick_timer_millis;
+   return m;
+}
+
+void delay(unsigned long ms)
+{
+   unsigned long start = millis();
+
+   while (millis() - start <= ms)
+      ;
+}
+
+
+
+#if 1
+void delayMicroseconds(uint32 us) {
+    uint32 target;
+    uint32 last, cur, count;
+    /* fudge factor hacky hack hack for function overhead  */
+    target = us * CYCLES_PER_MICROSECOND - FUDGE;
+
+    /* Get current count */
+    last = systick_get_count();
+    cur = systick_get_count();
+    count = last;
+    while ((count-cur) <= target) {
+        cur = systick_get_count();
+
+        /* check for overflow  */
+        if (cur > last) {
+            count += MAPLE_RELOAD_VAL;
+        }
+        last = cur;
+    }
+}
+#endif