AN2512 datasheet(30/38 Pages) STMICROELECTRONICS

30 / 38 page

Example of source code

AN2512

30/38

long int frac[4];

/* fraction part of energy integrator */

long int integ[4];

/* integer part of energy integrator */

} ENERG;

/* definition of variables for internal registers values */

char status[3];

char mode[3];

int freq[3];

int uRMS[3];

int iRMS[3];

int uMOM[3];

int iMOM[3];

long int active0[4];

long int active1[4];

long int reactive[4];

long int apparent[4];

/* allocation for all types of energies */

long int new;

/* energy value to be handled */

ENERG *e;

/* -> energy integrator */

ENERG ActWB;

/* Active wide band energy */

ENERG Reactive;

/* Reactive energy */

ENERG ActFund;

/* Active fundamental energy */

ENERG Apparent;

/* Apparent energy */

/* definition of constant */

#define ELIMIT 0x140000 /* produces 0.01 kWh resolution in case of 128000 pulses per

kWh */

/*----------------------------------------------------------------------------------

ROUTINE NAME : EnergyQuant

INPUT/OUTPUT : None/None

DESCRIPTION

: Energy quant computing function (version for signed

energy

integration). Checks for rollovers and compute quant as difference between new and

old value. Returns a negative sign of quant.

----------------------------------------------------------------------------------*/

int EnergyQuant(Long int *new)

{

long int NewTemp;

char i,Temp;

AN2512 Datasheet(PDF) 30 Page - STMicroelectronics

AN2512 Datasheet(HTML) 30 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Datasheet Download

Link URL