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Implementation
Variable Speed DC Fan Control using the MC9RS08KA2, Rev. 0
32 Freescale Semiconductor
lda #255
Quiet:
bclr BUZZER, PTAD ; Clear buzzer
mov #30, MTIMMOD
mov #(mMTIMSC_TRST|mMTIMSC_TOIE), MTIMSC; Reset and Start Timer
wait
mov #(mMTIMSC_TSTP|mMTIMSC_TRST), MTIMSC; mask interrupt and clear flag
sta MAP_ADDR_6(SRS) ; Bump COP
dbnza Quiet
bra SoundBuzzer
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
; Lookup Table
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
org TableStart
dc.b 57, 57, 57, 57, 57, 60, 63, 67, 71, 76, 82, 82, 88, 88, 96, 96
dc.b 105,105,115,115,115,128,128,128,128,144,144,144,144,165,165,165
dc.b 165,193,193,193,193,193,232,232,232,232,232,232,232,232,232,232
dc.b 232,232,232,232,232,232,232,232,232,232,232,232,232,232,232,232
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
; Reset Vector
;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
org $3ffc
Security:
dc.b $FF
jmp main