From 83fa155385e88ac06d6834604ab57c1132c5b0af Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Fri, 29 Nov 2013 13:24:08 +0000
Subject: git-svn-id:
 svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6513
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/rt/include/chsys.h |  9 ++++++---
 os/rt/include/chvt.h  | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 3 deletions(-)

(limited to 'os/rt/include')

diff --git a/os/rt/include/chsys.h b/os/rt/include/chsys.h
index 9a74788ae..1b80bba65 100644
--- a/os/rt/include/chsys.h
+++ b/os/rt/include/chsys.h
@@ -145,35 +145,38 @@
 /**
  * @brief   Realtime counter cycles to seconds.
  * @details Converts from realtime counter cycles number to seconds.
+ * @note    The result is rounded up to the next second boundary.
  *
  * @param[in] n         number of cycles
  * @return              The number of seconds.
  *
  * @api
  */
-#define RTC2S(n) (rtcnt_t)(CH_CFG_RTC_FREQUENCY / (freq))
+#define RTC2S(n) ((((n) - 1UL) / CH_CFG_RTC_FREQUENCY) + 1UL)
 
 /**
  * @brief   Realtime counter cycles to milliseconds.
  * @details Converts from realtime counter cycles number to milliseconds.
+ * @note    The result is rounded up to the next millisecond boundary.
  *
  * @param[in] n         number of cycles
  * @return              The number of milliseconds.
  *
  * @api
  */
-#define RTC2MS(n) ((n) / (CH_CFG_RTC_FREQUENCY / 1000UL))
+#define RTC2MS(n) ((((n) - 1UL) / (CH_CFG_RTC_FREQUENCY / 1000UL)) + 1UL)
 
 /**
  * @brief   Realtime counter cycles to microseconds.
  * @details Converts from realtime counter cycles number to microseconds.
+ * @note    The result is rounded up to the next microsecond boundary.
  *
  * @param[in] n         number of cycles
  * @return              The number of microseconds.
  *
  * @api
  */
-#define RTC2US(n) ((n) / (CH_CFG_RTC_FREQUENCY / 1000000UL))
+#define RTC2US(n) ((((n) - 1UL) / (CH_CFG_RTC_FREQUENCY / 1000000UL)) + 1UL)
 /** @} */
 
 /**
diff --git a/os/rt/include/chvt.h b/os/rt/include/chvt.h
index ea84df9fd..35d9986c0 100644
--- a/os/rt/include/chvt.h
+++ b/os/rt/include/chvt.h
@@ -160,6 +160,42 @@ struct virtual_timer {
 #define US2ST(usec)                                                         \
   ((systime_t)(((((uint32_t)(usec)) *                                       \
                  ((uint32_t)CH_CFG_ST_FREQUENCY) - 1UL) / 1000000UL) + 1UL))
+
+/**
+ * @brief   System ticks to seconds.
+ * @details Converts from system ticks number to seconds.
+ * @note    The result is rounded up to the next second boundary.
+ *
+ * @param[in] n         number of system ticks
+ * @return              The number of seconds.
+ *
+ * @api
+ */
+#define ST2S(n) ((((n) - 1UL) / CH_CFG_ST_FREQUENCY) + 1UL)
+
+/**
+ * @brief   System ticks to milliseconds.
+ * @details Converts from system ticks number to milliseconds.
+ * @note    The result is rounded up to the next millisecond boundary.
+ *
+ * @param[in] n         number of system ticks
+ * @return              The number of milliseconds.
+ *
+ * @api
+ */
+#define ST2MS(n) ((((n) - 1UL) / (CH_CFG_ST_FREQUENCY / 1000UL)) + 1UL)
+
+/**
+ * @brief   System ticks to microseconds.
+ * @details Converts from system ticks number to microseconds.
+ * @note    The result is rounded up to the next microsecond boundary.
+ *
+ * @param[in] n         number of system ticks
+ * @return              The number of microseconds.
+ *
+ * @api
+ */
+#define ST2US(n) ((((n) - 1UL) / (CH_CFG_ST_FREQUENCY / 1000000UL)) + 1UL)
 /** @} */
 
 /*===========================================================================*/
-- 
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