; --- Power-on reset entry point
; --- Enable interrupts on falling edge of triggers 1 (tummy switch)
; --- and 2 (gravity switch), and rising edge of trigger 2.
POR: LD INT_ENABLE, TG1_LO OR TG2_LO OR TG2_HI
LD R0, GIGGLE ; Register 0 is used to store the next sound
; to be
played when the tummy switch is pressed.
STOP ; Power down and wait for interrupt.
; --- Micro jumps here when trigger 1 detects a falling edge (tummy switch is pressed).
; --- Note: Switch debouncing is performed in hardware by the microcontroller.
; --- The input pins also have internal pull-ups, so no external parts are
; --- required.
TG1_LO: [rampin] ; This is a vendor-supplied macro that ramps
; the ADPCM decoder output up to its center
; point
JMP R0, TG2_HI ; If
the doll is upright (TG2 = high), play
; one ofthe three tummy behavior sounds below.
[cry] ; Otherwise, cry
[rampout] ; Ramp the decoder output back to 0V
STOP
; --- Tummy behavior #1
GIGGLE: [giggle] ; Play the giggle sound
LD R0, LAUGH ; Next time around, we will laugh
[rampout] ; Ramp the decoder output back to 0V
STOP
; --- Tummy behavior #2
LAUGH: [laugh] ; Play the laughing sound
LD R0, NONSENSE ; Next time around, we will talk nonsense
[rampout] ; Ramp the decoder output back to 0V
STOP
; --- Tummy behavior #3
NONSENSE: [nonsense] ; Play a happy-sounding baby-talk phrase
LD R0, GIGGLE ; Loop back around to the first sound in the series
[rampout] ; Ramp the decoder output back to 0V
STOP
; --- Micro jumps here when trigger 2 detects a falling edge (doll is laid down).
TG2_LO: [rampin] ; Ramp the decoder output to its center point
[snore] ; Snore for a little while
[rampout] ; Ramp the decoder output back to 0V
STOP
; --- Micro jumps here when trigger 1 detects a rising edge (doll is stood up).
TG1_HI: [rampin] ; Ramp the decoder output to its center point
[yawn] ; Good morning! Yawn.
[rampout] ; Ramp the decoder output back to 0V
STOP
