Mini Color TFT with Joystick FeatherWing

README.rst

@@ -28,6 +28,7 @@ These drivers depends on:
 * `DotStar <https://github.com/adafruit/Adafruit_CircuitPython_DotStar>`_
 * `NeoPixel <https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel>`_
 * `DS3231 <https://github.com/adafruit/Adafruit_CircuitPython_DS3231>`_
+* `ST7735R <https://github.com/adafruit/Adafruit_CircuitPython_ST7735R>`_
 
 Please ensure all dependencies are available on the CircuitPython filesystem.
 This is easily achieved by downloading

adafruit_featherwing/minitft_featherwing.py

@@ -0,0 +1,105 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2019 Melissa LeBlanc-Williams for Adafruit Industries LLC
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+"""
+`adafruit_featherwing.minitft_featherwing`
+====================================================
+
+Helper for using the `Mini Color TFT with Joystick FeatherWing
+<https://www.adafruit.com/product/3321>`_.
+
+* Author(s): Melissa LeBlanc-Williams
+"""
+
+__version__ = "0.0.0-auto.0"
+__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_FeatherWing.git"
+
+from collections import namedtuple
+import board
+from micropython import const
+from adafruit_seesaw.seesaw import Seesaw
+from adafruit_seesaw.pwmout import PWMOut
+import displayio
+from adafruit_st7735r import ST7735R
+
+BUTTON_RIGHT = const(7)
+BUTTON_DOWN = const(4)
+BUTTON_LEFT = const(3)
+BUTTON_UP = const(2)
+BUTTON_SEL = const(11)
+BUTTON_A = const(10)
+BUTTON_B = const(9)
+
+Buttons = namedtuple("Buttons", "up down left right a b select")
+
+class MiniTFTFeatherWing:
+    """Class representing an `Mini Color TFT with Joystick FeatherWing
+       <https://www.adafruit.com/product/3321>`_.
+
+       Automatically uses the feather's I2C bus."""
+
+    _button_mask = ((1 << BUTTON_RIGHT) |
+                    (1 << BUTTON_DOWN) |
+                    (1 << BUTTON_LEFT) |
+                    (1 << BUTTON_UP) |
+                    (1 << BUTTON_SEL) |
+                    (1 << BUTTON_A) |
+                    (1 << BUTTON_B))
+
+    def __init__(self, address=0x5E, i2c=None, spi=None):
+        if i2c is None:
+            i2c = board.I2C()
+        if spi is None:
+            spi = board.SPI()
+        self._ss = Seesaw(i2c, address)
+        self._backlight = PWMOut(self._ss, 5)
+        self._backlight.duty_cycle = 0
+        self._ss.pin_mode_bulk(self._button_mask, self._ss.INPUT_PULLUP)
+        displayio.release_displays()
+        display_bus = displayio.FourWire(spi, command=board.D6, chip_select=board.D5)
+        self._ss.pin_mode(8, self._ss.OUTPUT)
+        self._ss.digital_write(8, True) # Reset the Display via Seesaw
+        self.display = ST7735R(display_bus, width=160, height=80, colstart=24,
+                               rotation=270, bgr=True)
+
+    @property
+    def backlight(self):
+        """
+        Return the current backlight duty cycle value
+        """
+        return self._backlight.duty_cycle / 255
+
+    @backlight.setter
+    def backlight(self, brightness):
+        """
+        Set the backlight duty cycle
+        """
+        self._backlight.duty_cycle = int(255 * min(max(1 - brightness, 0.0), 1.0))
+
+    @property
+    def buttons(self):
+        """
+        Return a set of buttons with current push values
+        """
+        button_values = self._ss.digital_read_bulk(self._button_mask)
+        return Buttons(*[not button_values & (1 << button) for button in
+                         (BUTTON_UP, BUTTON_DOWN, BUTTON_LEFT, BUTTON_RIGHT,
+                          BUTTON_A, BUTTON_B, BUTTON_SEL)])

docs/api.rst

@@ -24,3 +24,6 @@
 
 .. automodule:: adafruit_featherwing.matrix_featherwing
    :members:
+
+.. automodule:: adafruit_featherwing.minitft_featherwing
+  :members:

docs/conf.py

@@ -18,7 +18,7 @@
 # Uncomment the below if you use native CircuitPython modules such as
 # digitalio, micropython and busio. List the modules you use. Without it, the
 # autodoc module docs will fail to generate with a warning.
-autodoc_mock_imports = ["board", "busio"]
+autodoc_mock_imports = ["board", "busio", "displayio", "adafruit_st7735r"]
 
 intersphinx_mapping = {
     'python': ('https://docs.python.org/3.4', None),

docs/examples.rst

@@ -39,6 +39,10 @@ Ensure your device works with this simple test.
     :caption: examples/featherwing_matrix_simpletest.py
     :linenos:
 
+.. literalinclude:: ../examples/featherwing_minitft_simpletest.py
+    :caption: examples/featherwing_minitft_simpletest.py
+    :linenos:
+
 Other Examples
 ---------------
 

examples/featherwing_minitft_simpletest.py

@@ -0,0 +1,34 @@
+"""
+This example display a CircuitPython console and
+print which button that is being pressed if any
+"""
+import time
+from adafruit_featherwing import minitft_featherwing
+
+minitft = minitft_featherwing.MiniTFTFeatherWing()
+
+while True:
+    buttons = minitft.buttons
+
+    if buttons.right:
+        print("Button RIGHT!")
+
+    if buttons.down:
+        print("Button DOWN!")
+
+    if buttons.left:
+        print("Button LEFT!")
+
+    if buttons.up:
+        print("Button UP!")
+
+    if buttons.select:
+        print("Button SELECT!")
+
+    if buttons.a:
+        print("Button A!")
+
+    if buttons.b:
+        print("Button B!")
+
+    time.sleep(.001)