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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 ;do all 8
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 averaged A/D reading (i.e. NX)
jsr LfNx ;convert to level and
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
jsr adcbyta
jsr LfNx
mov RA,OA
;get averaged A/D reading (i.e. NX)
;LX:=(NX-N1)*ConversionValue/(N2-N1)
;store result in OA
clr RB ;RB will contain graphic pixels (default=$00)
cmp UnitEmpt
;if <UnitEmpty (preset value = empty or almost)
bcs Lzero ;then "empty" (no pixels)
cmp UnitFull
;if >=UnitFull (preset value = full or almost)
bcc Lsat ;then "full" (pixel $80=bit 7)
clrh
;otherwise determine one of 8 graphic values
ldx UnitDiv ;UnitDiv is roughly full range/8
div ;in order to give 8 values
mov #$01,RB ;but now value has to be converted to pixel
AN1950
Sensors
Freescale Semiconductor
11
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