MPXM2102AS datasheet(397/670 Pages) MOTOROLA

397 / 670 page

AN1315

3–251

Motorola Sensor Device Data

www.motorola.com/semiconductors

1EFE 74

#pragma mor @ 0x1efe = 0x74; /* this disables the watchdog counter and does

not add pull–down resistors on ports B and C */

/* put constants and variables here...they must be global */

/***************************************************************************/

0800 FC 30 DA 7A 36 6E E6 38 FE

const char lcdtab[]={0xfc,0x30,0xda,0x7a,0x36,0x6e,0xe6,0x38,0xfe,0x3e };

0809 3E

/* lcd pattern table

080A 27 10 03 E8 00 64 00 0A

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

0050 0005

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

0812 00 96 00 4B 00 96 00 1E 00

const long type[] = {

150,

75,

150,

30,

103

};

081B 67

MPX2010

MPX2050

MPX2100

MPX2200

MPX2700

The table above will cause the final results of the pressure to

engineering units to display the 1.5, 7.3 and 15.0 devices with a

decimal place in the tens position. The 30 and 103 psi devices will

display in integer units.

const long slope_const[]={ 450,418,423,427,432,436,441,445,454,459,

081C 01 C2 01 A2 01 A7 01 AB 01

463,468,472,477,481,450 };

0825 B0 01 B4 01 B9 01 BD 01 C6

082E 01 CB 01 CF 01 D4 01 D8 01

0837 DD 01 E1 01 C2

0000

registera areg;

/* processor’s A register */

0055

long atodtemp;

/* temp to accumulate 100 a/d readings for smoothing */

0059

long slope;

/* multiplier for adc to engineering units conversion */

005B

int adcnt;

/* a/d converter loop counter */

005C

long xdcr_offset;

/* initial xdcr offset */

005E

long sensor_model; /*

installed sensor based on J1..J3 */

0060

int sensor_index;

determine the location of the decimal pt. */

0061 0063

unsigned long i,j; /* counter for loops */

0065

unsigned int k;

/* misc variable */

struct bothbytes

{

int hi;

{

int lo;

};

union isboth

0066 0002

{

long

0066 0002

struct bothbytes b;

0066 0002

};

0066 0002

union isboth q;

/* used for timer set–up */

/***************************************************************************/

/* variables for add32

0068 0004

unsigned long SUM[2];

result

006C 0004

unsigned long ADDEND[2]; /*

one input

0070 0004

unsigned long AUGEND[2]; /*

second input

/* variables for sub32

0074 0004

unsigned long MINUE[2];

minuend

0078 0004

unsigned long SUBTRA[2]; /*

subtrahend

007C 0004

unsigned long DIFF[2];

difference

/* variables for mul32

0080 0004

unsigned long MULTP[2];

multiplier

0084 0004

unsigned long MTEMP[2];

high order 4 bytes at return */

0088 0004

unsigned long MULCAN[2]; /*

multiplicand at input, low 4 bytes at return */

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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