Added software SPI as an option

Author: makermelissa

examples/ili9341_shield_simpletest.py

@@ -13,7 +13,13 @@
 # Release any resources currently in use for the displays
 displayio.release_displays()
 
+# Use Hardware SPI
 spi = board.SPI()
+
+# Use Software SPI if you have a shield with pins 11-13 jumpered
+#import busio
+#spi = busio.SPI(board.D11, board.D13)
+
 tft_cs = board.D10
 tft_dc = board.D9