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MPXM2102AS Datasheet(PDF) 556 Page - Motorola, Inc |
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MPXM2102AS Datasheet(HTML) 556 Page - Motorola, Inc |
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556 / 670 page  AN1950 3–410 Motorola Sensor Device Data www.motorola.com/semiconductors bclr 5,porta ;LEDs off lda #$0A ;prepare to do this 10x tenx: jsr del25ms ;delay bclr 4,porta bset 5,porta ;alternate on/off jsr del25ms bset 4,porta bclr 5,porta ;and off/on dbnza tenx ;10 times so the LCD can get ready (slow startup) jsr lcdinit ;now initialize it bclr 4,porta bclr 5,porta ;LEDs off rts ;– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – bintasc: add #$30 ;add $30 (0–9 offset) cmp #$39 ;is it a number (0–9) ? bls d0to9b ;if so skip add #$07 ;else add $07 = total of $37 (A–F offset) d0to9b: rts ;– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – del1s: pshh pshx ldhx #$C350 bra delmain del100ms: pshh pshx ldhx #$1388 bra delmain del50ms: pshh pshx ldhx #$09C4 bra delmain del25ms: pshh pshx ldhx #$04E2 bra delmain del5ms: pshh pshx ldhx #$00FA bra delmain del1ms: pshh pshx ldhx #$0032 bra delmain del100us: pshh pshx ldhx #$0005 bra delmain delmain: mov #$36,tsc ;stop TIM & / 64 sthx tmodh ;count H:X x 20us bclr 5,tsc ;start clock delwait: brclr 7,tsc,delwait pulx pulh rts ;–––––––– A/D Routines –––––––––––––––––––––––––––––––––––––––––––––– adcbyti: mov #$00,adscr ;ADC set to PTA0 brclr 7,adscr,* ;wait for ADC reading lda adr rts ;;;;;;;;;;;;;;;;;;;;;;;;;; adcbyta; clr CNT ;average 256 readings clr RB clr RA do256a: bsr adcbyti add RA sta RA lda RB adc #$00 sta RB Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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