update for latest RTC implementation, tested with i2c GPS

Author: ladyada

examples/gps_time_source.py

@@ -9,13 +9,17 @@
 import adafruit_gps
 
 uart = busio.UART(board.TX, board.RX, baudrate=9600, timeout=10)
+#i2c = busio.I2C(board.SCL, board.SDA)
 
 gps = adafruit_gps.GPS(uart, debug=False)
+#gps = adafruit_gps.GPS_I2C(i2c, debug=False)  # Use I2C interface
+
 gps.send_command(b'PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
 gps.send_command(b'PMTK220,1000')
 
 print("Set GPS as time source")
 rtc.set_time_source(gps)
+the_rtc = rtc.RTC()
 
 last_print = time.monotonic()
 while True:
@@ -25,6 +29,9 @@
     current = time.monotonic()
     if current - last_print >= 1.0:
         last_print = current
+        if not gps.timestamp_utc:
+            print("No time data from GPS yet")
+            continue
         # Time & date from GPS informations
         print('Fix timestamp: {:02}/{:02}/{} {:02}:{:02}:{:02}'.format(
             gps.timestamp_utc.tm_mon,   # Grab parts of the time from the
@@ -36,19 +43,21 @@
 
         #Time & date from internal RTC
         print('RTC timestamp: {:02}/{:02}/{} {:02}:{:02}:{:02}'.format(
-            rtc.RTC.datetime.tm_mon,
-            rtc.RTC.datetime.tm_mday,
-            rtc.RTC.datetime.tm_year,
-            rtc.RTC.datetime.tm_hour,
-            rtc.RTC.datetime.tm_min,
-            rtc.RTC.datetime.tm_sec))
+            the_rtc.datetime.tm_mon,
+            the_rtc.datetime.tm_mday,
+            the_rtc.datetime.tm_year,
+            the_rtc.datetime.tm_hour,
+            the_rtc.datetime.tm_min,
+            the_rtc.datetime.tm_sec))
 
         #Time & date from time.localtime() function
         local_time = time.localtime()
+        
         print("Local time: {:02}/{:02}/{} {:02}:{:02}:{:02}".format(
             local_time.tm_mon,
             local_time.tm_mday,
             local_time.tm_year,
             local_time.tm_hour,
             local_time.tm_min,
             local_time.tm_sec))
+