From 875c8f368683e77371f75c0b9f1aa18237f118f2 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Wed, 15 Oct 2008 18:26:16 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@468
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 src/include/sleep.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src')

diff --git a/src/include/sleep.h b/src/include/sleep.h
index 36ba9470a..ac76b3fe8 100644
--- a/src/include/sleep.h
+++ b/src/include/sleep.h
@@ -25,6 +25,23 @@
 #ifndef _SLEEP_H_
 #define _SLEEP_H_
 
+/**
+ * Time conversion utility. Converts from seconds to system ticks number.
+ */
+#define S2ST(sec)   ((sec) * CH_FREQUENCY)
+
+/**
+ * Time conversion utility. Converts from milliseconds to system ticks number.
+ * @note The result is rounded upward to the next tick boundary.
+ */
+#define MS2ST(msec) (((((msec) - 1L) * CH_FREQUENCY) / 1000) + 1)
+
+/**
+ * Time conversion utility. Converts from microseconds to system ticks number.
+ * @note The result is rounded upward to the next tick boundary.
+ */
+#define US2ST(usec) (((((usec) - 1L) * CH_FREQUENCY) / 1000000) + 1)
+
 #ifdef __cplusplus
 extern "C" {
 #endif
-- 
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