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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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MPXM2010D 数据表(PDF) 16 Page - Freescale Semiconductor, Inc |
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MPXM2010D 数据表(HTML) 16 Page - Freescale Semiconductor, Inc |
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16 / 24 page  AN1950 Sensors 16 Freescale Semiconductor lsr DC ror DB ror DA ;divide DC:DB:DA by 2 lda NA add DA sta NA lda NB adc DB sta NB lda NC adc DC sta NC ;and add into NC:NB:NA lsla bcs nornd ;if carry=1 then remainder<1/2 of dividend lda RA add #$01 sta RA lda RB adc #$00 sta RB ;otherwise add 1 to result nornd: rts ;__________________________________________________________ ;__________________________________________________________ UNITS: brclr 2,porta,UNITS ;let go of ENT first lda #$01 ;===UNITS=== Allows user to select units: inches or cm jsr lcdcmdo ;clear screen ldhx #msg03 jsr lcdstro ;Unit Choice menu jsr del100ms clr RA ;menu choice=0 to begin with lda #$0D jsr lcdcmdo ;blink cursor on menu choice uluke: ldx RA ;get current menu choice clrh lda menupos,x ;and look up corresponding LCD address jsr lcdcmdo ;reposition cursor uwarm: brclr 1,porta,uPB1 ;check for SEL brclr 2,porta,uPB2 ;or for ENT bclr 4,porta ;otherwise bset 5,porta ;turn on "SEL" LED jsr del100ms ;delay bset 4,porta ;toggle LEDs bclr 5,porta ;"ENT" now on: means choice is SEL ***or*** ENT jsr del100ms ;delay and repeat until SEL or ENT bra uwarm uPB1: inc RA ;***SEL*** toggles menu choices lda RA cmp #$02 ;menu choices are $00 and $01 bne uPB1ok clr RA ;back to $00 when all others have been offered uPB1ok: bclr 4,porta bclr 5,porta ;LEDs off jsr del100ms ;wait a little bit brclr 1,porta,uPB1ok ;make sure they let go of SEL bra uluke |
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