New Contiki port to STM32W108.

cpu/stm32w108/hal/micro/system-timer.h

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+/** @file hal/micro/system-timer.h
+ *  @brief Header file for system_timer APIs
+ * 
+ *
+ * <!--(C) COPYRIGHT 2010 STMicroelectronics. All rights reserved.        -->
+
+ */
+
+/** @addtogroup system_timer
+ * @brief Functions that provide access to the system clock.
+ *
+ * A single system tick (as returned by ::halCommonGetInt16uMillisecondTick() and
+ * ::halCommonGetInt32uMillisecondTick() ) is approximately 1 millisecond.
+ *
+ * - When used with a 32.768kHz crystal, the system tick is 0.976 milliseconds.
+ *
+ * - When used with a 3.6864MHz crystal, the system tick is 1.111 milliseconds.
+ *
+ * A single quarter-second tick (as returned by
+ * ::halCommonGetInt16uQuarterSecondTick() ) is approximately 0.25 seconds.
+ *
+ * The values used by the time support functions will wrap after an interval.
+ * The length of the interval depends on the length of the tick and the number
+ * of bits in the value. However, there is no issue when comparing time deltas
+ * of less than half this interval with a subtraction, if all data types are the
+ * same.
+ *
+ * See system-timer.h for source code.
+ *@{
+ */
+
+#ifndef __SYSTEM_TIMER_H__
+#define __SYSTEM_TIMER_H__
+
+/**
+ * @brief Initializes the system tick.
+ *
+ * @return Time to update the async registers after RTC is started (units of 100 
+ * microseconds).
+ */
+int16u halInternalStartSystemTimer(void);
+
+
+/**
+ * @brief Returns the current system time in system ticks, as a 16-bit
+ * value.
+ *
+ * @return The least significant 16 bits of the current system time, in system
+ * ticks.
+ */
+//#pragma pagezero_on  // place this function in zero-page memory for xap 
+int16u halCommonGetInt16uMillisecondTick(void);
+//#pragma pagezero_off
+
+/**
+ * @brief Returns the current system time in system ticks, as a 32-bit
+ * value.
+ *
+ * @nostackusage
+ *
+ * @return The least significant 32 bits of the current system time, in 
+ * system ticks.
+ */
+int32u halCommonGetInt32uMillisecondTick(void);
+
+/**
+ * @brief Returns the current system time in quarter second ticks, as a
+ * 16-bit value.
+ *
+ * @nostackusage
+ *
+ * @return The least significant 16 bits of the current system time, in system
+ * ticks multiplied by 256.
+ */
+int16u halCommonGetInt16uQuarterSecondTick(void);
+
+#endif //__SYSTEM_TIMER_H__
+
+/**@} //END addtogroup 
+ */
+
+
+
+