mirror of https://github.com/rusefi/rusefi-1.git
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/**
|
|
* @file efitime.h
|
|
*
|
|
* By the way, there are 86400000 milliseconds in a day
|
|
*
|
|
* @date Apr 14, 2014
|
|
* @author Andrey Belomutskiy, (c) 2012-2020
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "efifeatures.h"
|
|
#include "rusefi_types.h"
|
|
|
|
#define US_PER_SECOND 1000000
|
|
#define US_PER_SECOND_F 1000000.0
|
|
#define US_PER_SECOND_LL 1000000LL
|
|
#define NT_PER_SECOND (US2NT(US_PER_SECOND_LL))
|
|
|
|
#define MS2US(MS_TIME) ((MS_TIME) * 1000)
|
|
|
|
// microseconds to ticks
|
|
// since only about 20 seconds of ticks fit in 32 bits this macro is casting parameter into 64 bits 'efitime_t' type
|
|
// please note that int64 <-> float is a heavy operation thus we have 'USF2NT' below
|
|
#define US2NT(us) (((efitime_t)(us)) * US_TO_NT_MULTIPLIER)
|
|
|
|
// microseconds to ticks, but floating point
|
|
// If converting a floating point time period, use this macro to avoid
|
|
// the expensive conversions from int64 <-> float
|
|
#define USF2NT(us_float) ((us_float) * US_TO_NT_MULTIPLIER)
|
|
|
|
// And back
|
|
#define NT2US(x) ((x) / US_TO_NT_MULTIPLIER)
|
|
|
|
// milliseconds to ticks
|
|
#define MS2NT(msTime) US2NT(MS2US(msTime))
|
|
// See USF2NT above for when to use MSF2NT
|
|
#define MSF2NT(msTimeFloat) USF2NT(MS2US(msTimeFloat))
|
|
|
|
/**
|
|
* We use this 'deep in past, before ECU has ever started' value as a way to unify
|
|
* handling of first ever event and an event which has happened after a large pause in engine activity
|
|
*/
|
|
#define DEEP_IN_THE_PAST_SECONDS -10
|
|
|
|
// todo: implement a function to work with times considering counter overflow
|
|
#define overflowDiff(now, time) ((now) - (time))
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
/**
|
|
* 64-bit counter of microseconds (1/1 000 000 of a second) since MCU reset
|
|
*
|
|
* By using 64 bit, we can achieve a very precise timestamp which does not overflow.
|
|
* The primary implementation counts the number of CPU cycles from MCU reset.
|
|
*
|
|
* WARNING: you should use getTimeNowNt where possible for performance reasons.
|
|
* The heaviest part is '__aeabi_ildivmod' - non-native 64 bit division
|
|
*/
|
|
efitimeus_t getTimeNowUs(void);
|
|
|
|
/**
|
|
* 64-bit counter CPU cycles since MCU reset
|
|
*
|
|
* See getTimeNowLowerNt for a quicker version which returns only lower 32 bits
|
|
* Lower 32 bits are enough if all we need is to measure relatively short time durations
|
|
* (BTW 2^32 cpu cycles at 168MHz is 25.59 seconds)
|
|
*/
|
|
efitick_t getTimeNowNt(void);
|
|
|
|
efitick_t getHalTimer(void);
|
|
|
|
/**
|
|
* @brief Returns the number of milliseconds since the board initialization.
|
|
*/
|
|
efitimems_t currentTimeMillis(void);
|
|
|
|
/**
|
|
* @brief Current system time in seconds.
|
|
*/
|
|
efitimesec_t getTimeNowSeconds(void);
|
|
|
|
// Get a monotonically increasing (but wrapping) 32-bit timer value
|
|
uint32_t getTimeNowLowerNt(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|