Adds support for esp32 wrover kit 4.1 display based on ILI9341

tested successfully with gui.demos scripts @ 30 Mhz

setup_examples/ili9341_esp32_wroverkit.py

@@ -0,0 +1,32 @@
+# color_setup.py Customise for your hardware config
+
+# Released under the MIT License (MIT). See LICENSE.
+# Copyright (c) 2020 Peter Hinch
+
+# As written, supports:
+# ili9341 240x320 displays on ESP32 Wrover KIT 4.1
+# See https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-wrover-kit.html
+
+# Demo of initialisation procedure designed to minimise risk of memory fail
+# when instantiating the frame buffer. The aim is to do this as early as
+# possible before importing other modules.
+
+from machine import Pin, SPI
+import gc
+
+# ili9341 specific driver
+from drivers.ili93xx.ili9341 import ILI9341 as SSD
+
+pdc = Pin(21, Pin.OUT, value=0)  
+prst = Pin(18, Pin.OUT, value=1)
+pcs = Pin(22, Pin.OUT, value=1)
+
+# Kept as ssd to maintain compatability
+gc.collect()  # Precaution before instantiating framebuf
+# See DRIVERS.md re overclocking the SPI bus
+spi = SPI(2, sck=Pin(19), mosi=Pin(23), miso=Pin(25), baudrate=30_000_000)
+ssd = SSD(spi, dc=pdc, cs=pcs, rst=prst)
+
+# turn on the backlight
+bl = Pin(5, Pin.OUT)
+bl.value(0)