Added countdown with clock and sound

bindings/python/samples/race-clock.py

@@ -0,0 +1,85 @@
+import time  # type: ignore
+import datetime  # type: ignore
+from signal import pause  # type: ignore
+from samplebase import SampleBase  # type: ignore
+from rgbmatrix import RGBMatrix, RGBMatrixOptions, graphics  # type: ignore
+import subprocess  # For system audio playback
+
+# Matrix and Graphics Configuration
+options = RGBMatrixOptions()
+options.rows = 32
+options.cols = 64
+options.chain_length = 1
+options.parallel = 1
+options.hardware_mapping = 'adafruit-hat'
+options.drop_privileges = False
+options.gpio_slowdown = 3 # set 3 to decrease glitches (works well with pi4b)
+options.pwm_bits = 1
+matrix = RGBMatrix(options=options)
+
+# Fonts
+font = graphics.Font()
+font.LoadFont("~/rpi-rgb-led-matrix/fonts/6x10.bdf")
+font1 = graphics.Font()
+font1.LoadFont("~/rpi-rgb-led-matrix/fonts/8x13B.bdf")
+font2 = graphics.Font()
+font2.LoadFont("~/rpi-rgb-led-matrix/fonts/6x9.bdf")
+
+# Colors
+red = graphics.Color(255, 0, 0)
+green = graphics.Color(0, 255, 0)
+blue = graphics.Color(0, 0, 255)
+white = graphics.Color(255, 255, 255)
+
+# Audio Configuration
+red_alert_sound = "~/rpi-rgb-led-matrix/bindings/python/samples/REPLACE_WITH_YOUR_AUDIO.wav"  # Replace with your WAV file path
+
+# Utility Functions
+def clear_screen():
+    matrix.Clear()
+
+def play_audio(file_path):
+    # Play the .wav file using system command
+    subprocess.Popen(["aplay", file_path])
+
+def display_clock():
+    global sound_played
+    clear_screen()
+    graphics.DrawText(matrix, font, 3, 10, red, clockwork)  # Render clock
+
+    # Countdown logic
+    if countdown > 5:
+        sound_played = False  # Reset the flag when not in the red zone
+        graphics.DrawText(matrix, font, 15, 26, white, f": {countdown}")
+    elif countdown <= 5:
+        graphics.DrawText(matrix, font, 15, 26, red, f": {countdown}")
+        if countdown == 4 and not sound_played:
+            play_audio(red_alert_sound)  # Play audio when countdown is 4
+            sound_played = True
+    if countdown == 1:
+        graphics.DrawText(matrix, font, 15, 26, red, f": {countdown}")
+        time.sleep(1)
+        clear_screen()
+        graphics.DrawText(matrix, font1, 12, 21, green, "START")
+        time.sleep(1)
+
+# Main Loop
+countdown_length = 10  # Set the countdown length
+time_buffer = []
+sound_played = False  # Audio flag for 4-second countdown
+
+while True:
+    start_time = datetime.datetime.now()  # Record start of loop
+    clockwork = start_time.strftime("%H:%M:%S")  # Current time
+
+    # Countdown calculation
+    countdown = abs((int(start_time.second) % countdown_length) - countdown_length)
+
+    # Display the clock and countdown
+    display_clock()
+
+    # Calculate time spent in this loop iteration
+    elapsed_time = (datetime.datetime.now() - start_time).total_seconds()
+
+    # Adjust sleep to ensure each loop runs precisely for 1 second
+    time.sleep(max(0, 1 - elapsed_time))