Create code.py

CircuitPython_Simple_Wordclock/code.py

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+# Vertical Word Clock using the Adafruit Feather M4 and
+#   the Adafruit DS3231 real-time clock FeatherWing
+
+import time
+import board
+import busio as io
+import digitalio
+import adafruit_ds3231
+import neopixel
+
+i2c = io.I2C(board.SCL, board.SDA)
+
+# Create the RTC instance:
+rtc = adafruit_ds3231.DS3231(i2c)
+
+LED13 = digitalio.DigitalInOut(board.D13)
+LED13.direction = digitalio.Direction.OUTPUT
+
+pixel_pin = board.D5
+num_pixels = 21
+pixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.8)
+pixels.fill((0, 0, 0))
+COLOR = (0, 200, 0)  # Green 
+
+# Bitmap values for each value. These can be OR'ed together
+THREE = 0b00000000000000000001
+EIGHT = 0b00000000000000000010
+ELEVEN = 0b00000000000000000100
+TWO = 0b00000000000000001000
+SIX = 0b00000000000000010000
+FOUR = 0b00000000000000100000
+SEVEN = 0b00000000000001000000
+NOON = 0b00000000000010000000
+TEN = 0b00000000000100000000
+ONE = 0b00000000001000000000
+FIVE = 0b00000000010000000000
+MIDNIGHT = 0b00000000100000000000
+NINE = 0b00000001000000000000
+PAST = 0b00000010000000000000
+TO = 0b00000100000000000000
+FIVEMIN = 0b00001000000000000000
+QUARTER = 0b00010000000000000000
+TENMIN = 0b00100000000000000000
+HALF = 0b01000000000000000000
+TWENTY = 0b10000000000000000000
+
+def writetime(the_hr, the_min):  # Pass in hour and minute, return LED bitmask
+    value = 0b00000000000000000000
+    if (the_hr == 24) and (the_min == 0):  # Special cases: Midnight and Noon
+        return MIDNIGHT
+    if (the_hr == 12) and (the_min == 0):
+        return NOON
+    # set minute
+    if (the_min > 4) and (the_min < 10):
+        value = value | FIVEMIN
+    if (the_min > 9) and (the_min < 15):
+        value = value | TENMIN
+    if (the_min > 14) and (the_min < 20):
+        value = value | QUARTER
+    if (the_min > 19) and (the_min < 25):
+        value = value | TWENTY
+    if (the_min > 25) and (the_min < 30):
+        value = value | TWENTY | FIVEMIN
+    if (the_min > 29) and (the_min < 35):
+        value = value | HALF
+    if (the_min > 34) and (the_min < 40):
+        value = value | TWENTY | FIVEMIN
+    if (the_min > 39) and (the_min < 45):
+        value = value | TWENTY
+    if (the_min > 44) and (the_min < 50):
+        value = value | QUARTER
+    if (the_min > 49) and (the_min < 55):
+        value = value | TENMIN
+    if the_min > 54:
+        value = value | FIVEMIN
+    # before or after
+    if the_min <= 30:
+        value = value | PAST
+    else:
+        the_hr = the_hr + 1  # for the TO case
+        value = value | TO
+    # set hour
+    if the_hr > 12:
+        the_hr = the_hr - 12  # Convert 24 hour format to 12 hour
+    if the_hr == 1:
+        value = value | ONE
+    if the_hr == 2:
+        value = value | TWO
+    if the_hr == 3:
+        value = value | THREE
+    if the_hr == 4:
+        value = value | FOUR
+    if the_hr == 5:
+        value = value | FIVE
+    if the_hr == 6:
+        value = value | SIX
+    if the_hr == 7:
+        value = value | SEVEN
+    if the_hr == 8:
+        value = value | EIGHT
+    if the_hr == 9:
+        value = value | NINE
+    if the_hr == 10:
+        value = value | TEN
+    if the_hr == 11:
+        value = value | ELEVEN
+    if the_hr == 0:
+        value = value | MIDNIGHT
+    if the_hr == 12:
+        value = value | NOON
+    return value
+# end def
+
+# Main loop
+LEDstate = 0
+
+while True:
+    t = rtc.datetime
+    # print("The date is {} {}/{}/{}".format(days[int(t.tm_wday)],
+    #        t.tm_mday, t.tm_mon, t.tm_year))
+    # print("The time is {}:{:02}:{:02}".format(t.tm_hour, t.tm_min, t.tm_sec))
+    hour = t.tm_hour
+    minute = t.tm_min
+    second = t.tm_sec
+    if second == 59:
+        print("The time is {}:{:02}".format(t.tm_hour, t.tm_min))
+        pixels.fill((0, 0, 0))       # blank all pixels for change
+        the_time = writetime(hour, minute)
+        for i in range(1, 21):       # Check all 30 bits
+            if the_time & 1 << i:    # If the bit is true
+                pixels[i+1] = COLOR  # set pixel on (shift up 2 for buried one)
+        pixels.show()
+    if LEDstate == 0:       # Flash the D13 LED every other second for activity
+        LED13.value = True
+        LEDstate = 1
+    else:
+        LED13.value = False
+        LEDstate = 0
+    time.sleep(1)  # wait a second