DEMO9RS08KA2 datasheet(26/34 Pages) FREESCALE

26 / 34 page

Getting Started with RS08, Rev. 1

Emulated ADC Application Example

Freescale Semiconductor

bset

ACMP1SC_ACF, ACMP1SC

;Clear ACMP Flag

clr

ACMP1SC

;disable ACMP

mov

#(mMTIM1SC_TSTP|mMTIM1SC_TRST), MTIM1SC

;mask int and clear flag

rts

NoReading:

mov

#$FF, SensorReading

;Biggest Number

clr

ACMP1SC

;disable ACMP

mov

#(mMTIM1SC_TSTP|mMTIM1SC_TRST), MTIM1SC

;mask int and clear flag

rts

d) In TableLookup subroutine the two most significant bits (MSB) of the variable SensorReading

are extracted and added to the page number that holds the lookup table. The corresponding

lookup table content is mapped to the 64-byte paging window, $00C0 to $00FF. Then the six

least significant bits (LSB) of the variable SensorReading is used as an index to read out the

upper memory content directly from the paging window.

;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

; 8bit Table Lookup

;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

TableLookup:

lda

SensorReading

;

rola

;Extract 2 MSB

rola

;

rola

;

and

#$03

;Mask all other bits

add

#(TableStart>>6)

;Add to Lookup table page

sta

PAGESEL

;High page

lda

SensorReading

;

and

#$3F

;Extract 6 LSB

add

#$c0

;Index to paging window

tax

;

lda

;Read upper memory

sta

ADCOut

;Store lookup table content

mov

#(HREG), PAGESEL

;Return to register page

rts

;

;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

; ADC Lookup Table - RC charging profile

;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

org

TableStart

dc.b

5, 10, 14, 18, 23, 27, 31, 35, 39, 43, 47, 50, 54, 58, 61

dc.b

65, 68, 71, 75, 78, 81, 84, 87, 90, 93, 96, 99,102,105,107,110

dc.b

113,115,118,120,123,125,127,130,132,134,136,138,141,143,145,147

dc.b

149,150,152,154,156,158,160,161,163,165,166,168,169,171,173,174

dc.b

175,177,178,180,181,182,184,185,186,188,189,190,191,192,193,195

dc.b

196,197,198,199,200,201,202,203,204,205,206,206,207,208,209,210

dc.b

211,211,212,213,214,215,215,216,217,217,218,219,219,220,221,221

dc.b

222,223,223,224,224,225,225,226,226,227,228,228,228,229,229,230

dc.b

230,231,231,232,232,233,233,233,234,234,235,235,235,236,236,236

dc.b

237,237,237,238,238,238,239,239,239,240,240,240,240,241,241,241

dc.b

241,242,242,242,242,243,243,243,243,244,244,244,244,244,245,245

dc.b

245,245,245,246,246,246,246,246,246,247,247,247,247,247,247,247

dc.b

248,248,248,248,248,248,248,249,249,249,249,249,249,249,249,249

dc.b

250,250,250,250,250,250,250,250,250,250,251,251,251,251,251,251

dc.b

251,251,251,251,251,251,252,252,252,252,252,252,252,252,252,252

dc.b

252,252,252,252,252,252,253,253,253,253,253,253,253,253,253,253

DEMO9RS08KA2 Datasheet(PDF) 26 Page - Freescale Semiconductor, Inc

DEMO9RS08KA2 Datasheet(HTML) 26 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Datasheet Download

Link URL