dial a song code and wav files

Author: jedgarpark

Dial-a-Song/code.py

@@ -0,0 +1,141 @@
+# SPDX-FileCopyrightText: 2022 John Park for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
+# DTMF keypad phone Dial-a-Song
+import time
+import random
+import board
+import keypad
+from audiocore import WaveFile
+from audiopwmio import PWMAudioOut as AudioOut  # for RP2040 etc
+import audiomixer
+
+# time.sleep(3)  # let USB settle during development, remove when on battery
+
+km = keypad.KeyMatrix(
+    # 2500 phone ignoring first column store/redial/memory. reverse mount on Feather RP2040
+    column_pins=(          board.A3, board.A2, board.A1,),
+    row_pins=(
+                board.D24,
+                board.D25,
+                board.SCK,
+                board.MOSI,
+                 ),
+)
+
+numbers = {
+            "8675309" : "songs/beepbox.wav",
+            "6358393" : "songs/streetchicken.wav",
+            "5551212" : "songs/carpeter.wav",
+            "7654321" : "songs/daisy.wav"
+}
+
+ringing = "songs/full_ring.wav"
+wrong_number = "songs/blank_number.wav"
+dial_tone = "songs/dial_tone_loop.wav"
+busy_signal = "songs/busy_loop.wav"
+
+button_tones = [
+                "dtmf/tt_1.wav", "dtmf/tt_2.wav",  "dtmf/tt_3.wav",
+                "dtmf/tt_4.wav", "dtmf/tt_5.wav", "dtmf/tt_6.wav",
+                "dtmf/tt_7.wav", "dtmf/tt_8.wav", "dtmf/tt_9.wav",
+                "dtmf/tt_star.wav", "dtmf/tt_0.wav", "dtmf/tt_pound.wav"
+]
+
+digits_entered = 0  # counter
+dialed = []  # list of digits user enters to make one 7 digit number
+dialed_str = ""  # stores the phone number string for dictionary comparison
+
+audio = AudioOut(board.TX)  # PWM out pin
+mixer = audiomixer.Mixer(
+    voice_count=4,
+    sample_rate=22050,
+    channel_count=1,
+    bits_per_sample=16,
+    samples_signed=True,
+)
+audio.play(mixer)
+mixer.voice[0].level = 1.0  # dial tone voice
+mixer.voice[1].level = 1.0  # touch tone voice
+mixer.voice[2].level = 0.0  # song/message voice
+mixer.voice[3].level = 0.0  # busy signal
+
+wave_file0 = open(dial_tone, "rb")
+wave0 = WaveFile(wave_file0)
+mixer.voice[0].play(wave0, loop=True)  # play dial tone
+
+wave_file2 = open(wrong_number, "rb")
+wave2 = WaveFile(wave_file2)
+
+wave_file3 = open(busy_signal, "rb")
+wave3 = WaveFile(wave_file3)
+mixer.voice[3].play(wave3, loop=True)  # play dial tone
+
+
+def reset_number():
+    # pylint: disable=global-statement
+    global digits_entered, dialed, dialed_str
+    digits_entered = 0
+    dialed = []
+    dialed_str = ""
+    km.events.clear()
+
+
+while True:
+
+    event = km.events.get()  # check for keypad presses
+    if event:
+        if event.pressed:
+            mixer.voice[0].level = 0.0  # mute the dial tone
+            wave_file1 = open(button_tones[event.key_number], "rb")  # play Touch Tone
+            wave1 = WaveFile(wave_file1)
+            mixer.voice[1].play(wave1)
+            if event.key_number == 9 or event.key_number == 11:  # check for special keys
+                if event.key_number == 9:  # pressed the '*' key
+                    reset_number()   # or make some cool new function for this key
+                if event.key_number == 11:  # pressed the '#' key
+                    reset_number()  # or make some cool new function for this key
+
+            else:  # number keys
+                if digits_entered < 7:  # adding up to full number
+                    # convert event to number printed on the keypad button, append to string
+                    if event.key_number < 9:  # 1-9 on keypad
+                        dialed.append(event.key_number+1)
+                    if event.key_number == 10:  # the 0 key, ignore '*' and "#'
+                        dialed.append(0)
+                    dialed_str = "".join(str(n) for n in dialed)
+                    digits_entered = digits_entered + 1  # increment counter
+
+                if digits_entered == 7:  # a full number has been entered
+                    if not mixer.voice[2].playing:
+                        dialed_str = "".join(str(n) for n in dialed)
+                        if dialed_str in numbers:  # check if dialed string is one in the directory
+                            value = numbers[dialed_str]
+                            time.sleep(0.6)
+
+                            wave_file2 = open(ringing, "rb")  # ring before it answers
+                            wave2 = WaveFile(wave_file2)
+                            mixer.voice[2].level = 1.0
+                            mixer.voice[2].play(wave2, loop=True)
+
+                            time.sleep(random.uniform(4.0, 9.5))  # random ring before "answer"
+
+                            wave_file2 = open(value, "rb")  # answered
+                            wave2 = WaveFile(wave_file2)
+                            mixer.voice[2].level = 1.0
+                            mixer.voice[2].play(wave2, loop=True)
+
+                        else:  # number is not in directory
+                            time.sleep(0.5)
+                            weighted_coin_toss = random.randint(0, 4)
+                            if weighted_coin_toss < 3:  # favor the "not in service" message
+                                mixer.voice[2].level = 1.0
+                                mixer.voice[2].play(wave2)
+                            else:
+                                mixer.voice[3].level = 1.0
+
+                        reset_number()
+
+                    if mixer.voice[2].playing:
+                        reset_number() # stop #s dialed during message play from doing anything