scale.h File Reference

Go to the source code of this file.

Macros
#define	MAX_AVG_WEIGHT   10
	Multiplier for average Value in GetAvg2. Maximum value is 21. More...
#define	MAXHIST   64
	Memory reserved for moving average, used for precision measurement mode. More...
#define	MIN_AVG_WEIGHT   4
	Multiplier for average Value in GetAvg2. More...
#define	MINHIST   8
	Number of values used for fast measurement mode. More...
#define	NUM_COEFF   11
#define	USE_GetAvg3
	Selection of averaging algorithm. Set to USE_GetAvg1 or USE_GetAvg2 as desired. More...

Typedefs
typedef uint16_t	delay_t
	The data type used by DelayMs(). Set to a type capable of counting the max ms you want to use. More...
typedef int32_t	weight_t
	The data type for a weight value. More...

Enumerations
enum	SWITCH_ACTION_t {   SWITCH_NONE, SWITCH_SHORT, SWITCH_MED, SWITCH_LONG,   SWITCH_DOUBLE }

Functions
void	Calibrate (void)
	Performs Calibration of the Scale. More...
void	DelayMs (delay_t ms)
	Delays for ms Milliseconds. More...
static void	PowerOff (void)
static void	PowerOn (void)

Variables
uint8_t	avgFactor
	The factor, the last weight is stronger than the current measurement value. More...
uint8_t	cnt128
	Must be set to zero to start summing. More...
const int8_t	coeff []
	The Array holding the Filter Coefficients. More...
static const uint8_t	EFLAG_LOBAT =2
	Is set on low Supply Voltage. More...
static const uint8_t	EFLAG_UNCAL =1
	Device has not been calibrated. More...
volatile uint8_t	eFlags
	Error flags. More...
uint8_t	histSize
	Number of values used for moving average. More...
uint8_t	hxCnt
	is incremented each time the HX receives a new value More...
bool	HXdisplayWeight
	If true, reading a new HX value updates the display. May be disabled for service display. More...
volatile uint8_t	secCnt
	Seconds of inactivity. More...
weight_t	sum128
	Contains the sum of 128 values when cnt128==128. More...
volatile SWITCH_ACTION_t	switchAction
	Is set by interrupt if the switch has been pressed. Must be reset by the surrounding loop. More...
static const uint8_t	TFLAG_SEC =1
	Is set once per Second. More...
volatile uint8_t	tFlags
	Flags set by Time. More...
volatile uint8_t	tickCnt
	Counter for timer0 interrupts. More...
int32_t	weightHist []
	Array holding the last Weight Values. More...
volatile uint8_t	zeroWeightSecCnt
	Counts seconds of 'no load'. Used for accelerated power off. More...

Macro Definition Documentation

#define USE_GetAvg3

Selection of averaging algorithm. Set to USE_GetAvg1 or USE_GetAvg2 as desired.

#define MAXHIST   64

Memory reserved for moving average, used for precision measurement mode.

#define MINHIST   8

Number of values used for fast measurement mode.

#define MIN_AVG_WEIGHT   4

Multiplier for average Value in GetAvg2.

#define MAX_AVG_WEIGHT   10

Multiplier for average Value in GetAvg2. Maximum value is 21.

#define NUM_COEFF   11

Typedef Documentation

typedef uint16_t delay_t

The data type used by DelayMs(). Set to a type capable of counting the max ms you want to use.

typedef int32_t weight_t

The data type for a weight value.

Function Documentation

static void PowerOff ( void  )

inlinestatic

static void PowerOn ( void  )

inlinestatic

void DelayMs

(

delay_t

ms)

Delays for ms Milliseconds.

Note

The timer resolution is 1ms and the state of the timer when calling this function is normally undefined. The actual delay may differ up to 1ms from the given value (especially, it may be nearly 0 if you specify 1ms)!

Parameters

ms	The desired delay in Milliseconds

void Calibrate

(

void

)

Performs Calibration of the Scale.

Variable Documentation

uint8_t histSize

Number of values used for moving average.

uint8_t avgFactor

The factor, the last weight is stronger than the current measurement value.

const int8_t coeff[]

The Array holding the Filter Coefficients.

int32_t weightHist[]

Array holding the last Weight Values.

weight_t sum128

Contains the sum of 128 values when cnt128==128.

uint8_t cnt128

Must be set to zero to start summing.

volatile uint8_t tickCnt

Counter for timer0 interrupts.

volatile uint8_t secCnt

Seconds of inactivity.

volatile uint8_t zeroWeightSecCnt

Counts seconds of 'no load'. Used for accelerated power off.

uint8_t hxCnt

is incremented each time the HX receives a new value

bool HXdisplayWeight

If true, reading a new HX value updates the display. May be disabled for service display.