MPXM2102AS datasheet(477/670 Pages) MOTOROLA

477 / 670 page

AN1536

3–331

Motorola Sensor Device Data

www.motorola.com/semiconductors

NOTE. THIS

WAS COMPILED WITH A COMPILER COURTESY OF:

INTROL CORP.

9220 W. HOWARD AVE.

MILWAUKEE, WI. 53228

PHONE (414) 327–7734.

SOME SOURCE CODE CHANGES MAY BE NECESSARY FOR COMPILATION WITH OTHER COMPILERS.

THE HEADER FILE io6811.h HAS I/O PORT DEFINITIONS FOR THE I/O PORTS PARTICULAR TO THE MC68HC711E9. A TYPICAL ENTRY FOR

PORT A WILL FOLLOW. THE FIRST LINE ESTABLISHES A BASE ADDRESS BY WHICH ALL I/O FACILITIES AND COUNTERS ARE BIASED.

REFER TO THE

MC68HC711E9 DATA FOR MORE INFORMATION RELATIVE TO I/O AND TIMER ADDRESSES.

#define

IOBIAS 0x1000

/* BASE ADDRESS OF THE I/O FOR THE 68HC11 */

#define PORTA (* (char *) (IOBIAS + 0))

/* PORT A */

THE STARTUP ROUTINE NEED ONLY LOAD THE STACK TO THE TOP OF RAM, ZERO

THE MICROCONTROLLER’S RAM AND PERFORM A BSR MAIN (BRANCH TO SUBROUTINE “MAIN”).

THIS SOURCE CODE, HEADER FILE, COMPILED OBJECT CODE, AND LISTING FILES ARE AVAILABLE ON:

THE MOTOROLA FREEWARE LINE

AUSTIN, TX.

(512) 891–3733.

Bill Lucas 6/21/90

THE CODE STARTS HERE

#include <io6811.h>

I/O port definitions */

/* define locations in the eeprom to store calibration information */

#define EEPROM (char*)0xb600 /* used by calibration functions */

#define EEBASE 0xb600 /* start address of the eeprom */

#define ADZERO (* ( long int *)( EEBASE + 0 )) /* auto zero value */

#define HIATOD (* ( long int *)( EEBASE + 4 )) /* full scale measured input */

#define XDCRMAX (* ( char *)( EEBASE + 8 )) /* full scale input of the xdcr */

union bytes {

unsigned long int l;

char b[4];

};

/* ADZERO.l for long word

ADZERO.b[0]; for byte */

const char lcdtab[] = { 95,

59,

47, 102, 109, 125, 7, 127, 111,

};

lcd pattern table

blank */

const int dectable[] = { 10000, 1000, 100, 10 };

char digit[5]; /* buffer to hold results from cvt_bin_dec function */

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

/* real time interrupt service routine

void real_time_interrupt (void) /* hits every 4.096 ms. */

{

TFLG2 = 0x40;

/* clear the interrupt flag */

}

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

write_eeprom(0xA5,EEPROM);

write A5h to first byte of EEPROM */

void write_eeprom(char data, char *address)

{

PPROG = 0x16;

/* single–byte erase mode */

*address = 0xff;

/* write anything */

PPROG = 0x17;

/* turn on programming voltage */

delay();

PPROG = 0x0;

/* erase complete */

/* now program the data */

PPROG = 0x02;

/* set eelat bit */

*address = data;

/* write data */

PPROG = 0x03;

/* set eelat and eepgm bits */

delay();

PPROG = 0;

/* read mode */

/* programming complete */

}

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

long int convert(char polarity)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPXM2102AS Datasheet(PDF) 477 Page - Motorola, Inc

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