MPXM2010D datasheet(10/24 Pages) FREESCALE

10 / 24 page

AN1950

Sensors

Freescale Semiconductor

do256: lda #$C9

jsr lcdcmdo

;position LCD cursor at the right spot

lda CNT

deca

jsr lcdbyto

;display current iteration $FF downto $00

lda #':'

jsr lcdchro

jsr adcbyti

;get reading

add RA

sta RA

lda RB

adc #$00

sta RB

;add into RB:RA (16 bit add)

jsr lcdbyto

;show RB

lda RA

jsr lcdbyto

;then RA

dbnz CNT,do256

;and do 256x

lsl RA

;get bit7 into carry

bcc nochg

;if C=0 then no need to round up

inc RB

;otherwise round up

nochg: lda RB

;we can discard RA: average value is in RB

ldhx #N1

;point to flash location

jsr wrflash

;burn it in!

ldhx #msg05c

;ask for 160mm

jsr lcdstro

waitPB2: brset 2,porta,waitPB2 ;wait for ENT

ldhx #msg05d

;2nd point cal: show values

jsr lcdstro

clr CNT

;ditto as 1st point cal

clr RB

clr RA

do256b: lda #$C9

jsr lcdcmdo

lda CNT

deca

jsr lcdbyto

lda #':'

jsr lcdchro

jsr adcbyti

add RA

sta RA

lda RB

adc #$00

sta RB

jsr lcdbyto

lda RA

jsr lcdbyto

dbnz CNT,do256b

lsl RA

bcc nochg2

inc RB

nochg2: lda RB

cmp N1

;compare N2 to N1

bne validcal

;if different, we are OK

ldhx #msg05e

;otherwise warn of INVALID CAL!

jsr lcdstro

jsr del1s

;wait 2s

jmp CALIB

;try cal again

MPXM2010D 数据表(PDF) 10 Page - Freescale Semiconductor, Inc

MPXM2010D 数据表(HTML) 10 Page - Freescale Semiconductor, Inc

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MPXM2010D 数据表(PDF) 10 Page - Freescale Semiconductor, Inc

MPXM2010D 数据表(HTML) 10 Page - Freescale Semiconductor, Inc

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