speed.c File Reference

Speed sensor ISR and methods to get tacho information. More...

#include <avr/io.h>
#include <avr/interrupt.h>
#include "xtypes.h"
#include "global.h"
#include "timer.h"
#include "memory.h"
#include "speed.h"

Include dependency graph for speed.c:

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Defines
#define	EXPORT
#define	MAX_RELIABLE_SPEED   70U
	This value defines the maximum reliable speed. Used to detect false tacho ticks.
#define	SPEED_INT_ENABLE()   EIMSK |= (1<<INT0);
	This macro enables the tacho interrupt.
#define	SPEED_INT_DISABLE()   EIMSK &= ~(1<<INT0);
	This macro disables the tacho interrupt.
Functions
	ISR (SIG_INTERRUPT0)
	Service routine for tacho sensor interrupt.
void	speed_Init (void)
	Init function for this module.
UINT32	speed_GetRpm (void)
	Get method for mg_u32Rpm.
UINT32	speed_GetDistance (void)
	Get method for mg_u32Distance.
void	speed_CheckTimeout (UINT32 u32SystemTime)
	Check and get method for tacho timeout.
Variables
static volatile UINT32	mg_u32TickTime
	Variable to hold a timestamp of the last tacho interrupt.
static volatile UINT32	mg_u32Rpm
	This variable holds the value of wheel revolutions per minute.
static volatile UINT32	mg_u32Distance
	This variable holds the value of trip distance im mm.
static UINT16	mg_u16WheelSize
	This variable holds a copy value of wheel circumference in mm.
static UINT8	mg_u8NumMagnetsTacho = DEFAULT_MAGNET_NUMBER_TACHO
	UINT8 variable to keep the number of tacho reed switch magnets.

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Detailed Description

Author:

Philipp Bank

Copyright:

Creative Commons by-nc-sa 3.0 (http://creativecommons.org/licenses/by-nc-sa/3.0/)

This module contains an interrupt service routine for the tacho sensor signal and methods to calculate speed and trip distance.

Definition in file speed.c.