adding tft 3.5 inch helper class

Author: FoamyGuy

adafruit_featherwing/tft_featherwing_35.py

@@ -0,0 +1,60 @@
+# SPDX-FileCopyrightText: 2020 Melissa LeBlanc-Williams for Adafruit Industries
+# SPDX-FileCopyrightText: 2020 Foamyguy for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`adafruit_featherwing.tft_featherwing_35`
+====================================================
+
+Helper for using the `TFT FeatherWing 3.5"`
+<https://www.adafruit.com/product/3651>`_.
+
+* Author(s): Melissa LeBlanc-Williams, Foamyguy
+
+Requires:
+* adafruit_hx8357
+* adafruit_stmpe610
+"""
+
+__version__ = "0.0.0-auto.0"
+__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_FeatherWing.git"
+
+import board
+import digitalio
+import displayio
+from adafruit_hx8357 import HX8357
+from adafruit_stmpe610 import Adafruit_STMPE610_SPI
+import sdcardio
+import storage
+
+# pylint: disable-msg=too-few-public-methods
+class TFTFeatherWing35:
+    """Class representing an `TFT FeatherWing 3.5
+    <https://www.adafruit.com/product/3651>`_.
+
+    """
+
+    def __init__(self, spi=None, cs=None, dc=None):
+        displayio.release_displays()
+        if spi is None:
+            spi = board.SPI()
+        if cs is None:
+            cs = board.D9
+        if dc is None:
+            dc = board.D10
+
+        ts_cs = digitalio.DigitalInOut(board.D6)
+        self.touchscreen = Adafruit_STMPE610_SPI(spi, ts_cs)
+
+        display_bus = displayio.FourWire(spi, command=dc, chip_select=cs)
+        self.display = HX8357(display_bus, width=480, height=320)
+
+        sd_cs = board.D5
+        self._sdcard = None
+        try:
+            self._sdcard = sdcardio.SDCard(spi, sd_cs)
+            vfs = storage.VfsFat(self._sdcard)
+            storage.mount(vfs, "/sd")
+        except OSError as error:
+            print("No SD card found:", error)

examples/featherwing_tft35_simpletest.py

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+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+This example will display a CircuitPython console and
+print the coordinates of touchscreen presses.
+
+It will also try to write and then read a file on the
+SD Card.
+"""
+from adafruit_featherwing import tft_featherwing_35
+
+tft_featherwing = tft_featherwing_35.TFTFeatherWing35()
+
+try:
+    f = open("/sd/tft_featherwing.txt", "w")
+    f.write("Blinka\nBlackberry Q10 Keyboard")
+    f.close()
+
+    f = open("/sd/tft_featherwing.txt", "r")
+    print(f.read())
+    f.close()
+except OSError as error:
+    print("Unable to write to SD Card.")
+
+
+while True:
+    if not tft_featherwing.touchscreen.buffer_empty:
+        print(tft_featherwing.touchscreen.read_data())