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MPXM2102AS Datasheet(PDF) 550 Page - Motorola, Inc |
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MPXM2102AS Datasheet(HTML) 550 Page - Motorola, Inc |
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550 / 670 page  AN1950 3–404 Motorola Sensor Device Data www.motorola.com/semiconductors 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 jsr del1s jsr del1s ;wait 2s jmp CALIB ;try cal again validcal: ldhx #N2 jsr wrflash ;burn N2 into flash ldhx #msg05 ;and display new current cal values from flash jsr lcdstro lda N1 ;0mm value jsr lcdbyto lda #’/’ jsr lcdchro lda N2 ;160mm value jsr lcdbyto jsr del1s jsr del1s jmp nocalib ;done! ;__________________________________________________________ LEVEL: lda #$01 ;===LEVEL=== main routine: displays level, flow & graphics jsr lcdcmdo ;clear screen lda #$0C jsr lcdcmdo ;cursor off lda #$88 ;position cursor at LCD graphics portion jsr lcdcmdo ;(2nd half of first line) clra ;and write ascii $00 through $07 fillgfx: jsr lcdchro ;which contain the graphics related to inca ;40 different readings cmp #$08 bne fillgfx LVL: ldhx #ramfree ;point to 40 pressure readings lda #$28 ;count down from 40 purge: clr 0,x ;clear all those locations incx ;next (H cannot change: we are in page0 RAM) dbnza purge jsr adcbyta ;get Lref: reference A/D reading jsr LfNx sta Lgfx ;store in ”Level graphics” LVLwarm: bset 4,porta bset 5,porta ;LEDs on during this cycle ldhx #ramfree ;point to 40 pressure readings mov #$27,RA ;count down from 39 shiftgfx: lda 1,x ;take location+1 sta 0,x ;and move to location+0, i.e. shift graphics left incx ;next X (once again: we are in page 0, no need to worry about H) dbnz RA,shiftgfx ;do this 39x lda #$80 jsr lcdcmdo lda Lgfx jsr adcbyta ;get averaged A/D reading (i.e. LX) jsr LfNx ;LX:=(NX–N1)*160/(N2–N1) mov RA,OA clr RB cmp #$03 ;if <=2mm bcs Lzero ;then ”empty” cmp #$9E bcc Lsat ;then ”full” clrh ldx #$14 ;div by 20 div mov #$01,RB Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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