MPXM2102AS datasheet(481/670 Pages) MOTOROLA

481 / 670 page

AN1536

3–335

Motorola Sensor Device Data

www.motorola.com/semiconductors

{

if (d==30)

{

write_spi(0);

/* blank the upper digit */

write_spi(0);

/* blank the next to upper digit */

write_spi(47);

/* 3 */

write_spi(95);

/* 0 */

}

if (d==15)

{

write_spi(0);

/* blank the upper digit */

write_spi(0);

/* blank the next to upper digit */

write_spi(6);

/* 1 */

write_spi(109);

/* 5 */

}

write_spi(2);

while(1);

}

/* ################################################################### */

fullscale_calibrate()

{

int i;

long int temp;

union bytes average;

temp=0;

average.l = cala2d();

/* get the average of 50 a/d conversions */

for ( i=0; i<4; ++i)

write_eeprom(average.b[i],EEPROM+i+4);

write_spi(0);

/* blank the upper digit */

write_spi(113);

/* F */

write_spi(113);

/* F */

write_spi(113);

/* F */

write_spi(2);

while(1);

}

/* ################################################################### */

zero_calibrate()

{

int i;

long int temp;

union bytes average;

temp=0;

average.l = cala2d();

/* get the average of 50 a/d conversions */

for ( i=0; i<4; ++i)

write_eeprom(average.b[i],EEPROM+i);

write_spi(0);

/* blank the upper digit */

write_spi(95);

/* 0 */

write_spi(95);

/* 0 */

write_spi(95);

/* 0 */

write_spi(2);

while(1);

}

/* ################################################################### */

/* speed=8.208(square root(%full scale*transducer full scale)) */

display_speed()

{

long atod_result;

unsigned int j;

while(1)

{

atod_result = integrate(); /* read the a/d */

atod_result=( (atod_result*10000) / (HIATOD–ADZERO) ) * XDCRMAX;

atod_result=sqrt(atod_result);

atod_result=(atod_result*8208)/10000;

j=atod_result;

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPXM2102AS Datasheet(PDF) 481 Page - Motorola, Inc

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