Tweak Examples 3, 4, and 9

Example 3 - Print all characters on each digit rapidly
Example 4 - Cycle brightness a few times more rapidly, only print text once
Example 9 - Only shift 8 times, not infinitely

Author: sfe-SparkFro

examples/qwiic_alphanumeric_ex03_print_char.py

@@ -62,16 +62,19 @@ def run_example():
     my_display.print_char('T', 3)
 
     my_display.update_display()
+
+    time.sleep(1)
 
-    # # Un comment these lines if you want to see all available characters
-    # # Print to every digit of a given display
-    # for digit_num in range(0, 4):
-        # for i in range(ord(' '), ord('~')):
-            # if i is not ord(':') or ord('.'):
-                # my_display.print_char(chr(i), digit_num)
-                # my_display.update_display()
-                # time.sleep(1)
-                # my_display.clear()
+    # Display all available characters
+    for i in range(ord(' '), ord('~')):
+        if i is not ord(':') or ord('.'):
+            my_display.print_char(chr(i), 0)
+            my_display.print_char(chr(i), 1)
+            my_display.print_char(chr(i), 2)
+            my_display.print_char(chr(i), 3)
+            my_display.update_display()
+            time.sleep(0.1)
+            my_display.clear()
 
 if __name__ == '__main__':
     try:

examples/qwiic_alphanumeric_ex04_set_brightness.py

@@ -56,14 +56,17 @@ def run_example():
 
     print("\nQwiic Alphanumeric Ready!")
 
-    while True:
+    my_display.print("Milk")
+    
+    # Repeat a few times
+    for i in range(4):
+        # Loop through all brightness settings
         for i in range(0, 16):
             # The input to set_brightness() is a duty cycle over 16
             # So, the acceptable inputs to this function are ints between 0
             # (1/16 brightness) and 15 (full brightness)
             my_display.set_brightness(i)
-            time.sleep(1)
-            my_display.print("Milk")
+            time.sleep(0.1)
 
 if __name__ == '__main__':
     try:

examples/qwiic_alphanumeric_ex09_scrolling_string.py

@@ -58,7 +58,8 @@ def run_example():
 
     my_display.print("GET MILK")
 
-    while 1:
+    # Loop through all 8 characters
+    for i in range(8):
         time.sleep(1)
         my_display.shift_left()
         # Alternatively - you could also shift the string to the right