SCOPE Solution

TONE BURST

SCOPE ACT 1

FamilySCOPE Graph0.300 Difficulty0.300 Ring02 IDsc_a1_06_tone_burst

Prerequisites

BACK SEVEN

Unlocks

AA Scramble

Reference firmware sc_a1_06_tone_burst locked

Par power36 Par lines13 Par chips1

Objective

A short four-cycle square burst then silence to the window end.

Board Data

Window: 48
Pins: p0 OUT
Channels: p0 ANALOG label=CH1_p0_DAC
Peripherals: DAC data=p0 label=DAC_on_p0

Firmware Solution

; TONE BURST reference: four cycles of a period-4 square (high 2, low 2), 16 ticks
; of burst, then silence (0) held to the window end. r0 counts the burst cycles.
      mov  r0, 4         ; four burst cycles
burst:
      out  p0, 200       ; tone HIGH
      slp  2
      out  p0, 0         ; tone LOW
      slp  2
      dec  r0
      cmp  r0, 0
      jnz  burst         ; more burst cycles
silence:
      out  p0, 0         ; line goes quiet
      slp  8
      jmp  silence       ; hold silence to the window end

Board Definition

# TONE BURST. ACT 1, analog. The crew framing: clone the dialer's tone burst. Still
# DAC-only and exact-match. Reference is sc_a1_06_tone_burst.asm.
# TITLE TONE BURST
# OBJECTIVE A short four-cycle square burst then silence to the window end.
ID sc_a1_06_tone_burst
WINDOW 48
DIR p0 OUT
PERIPH DAC data=p0 label=DAC_on_p0
CHAN p0 ANALOG label=CH1_p0_DAC
PAR power=36 lines=13 chips=1