qt breakout & demo

Author: ladyada

adafruit_is31fl3741/__init__.py

@@ -185,7 +185,7 @@ def pixel(self, x, y, color=None):
         if not 0 <= y <= self.height:
             return None
         addrs = self.pixel_addrs(x, y)
-        print(addrs)
+        #print(addrs)
         if color is not None:  # set the color
             self[addrs[0]] = (color >> 16) & 0xFF
             self[addrs[1]] = (color >> 8) & 0xFF

adafruit_is31fl3741/adafruit_rgbmatrixqt.py

@@ -0,0 +1,72 @@
+# SPDX-FileCopyrightText: Tony DiCola 2017 for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`adafruit_is31fl3741.adafruit_rgbmatrixqt`
+====================================================
+
+CircuitPython driver for the Adafruit IS31FL3741 RGB Matrix QT board
+
+
+* Author(s): ladyada
+
+Implementation Notes
+--------------------
+
+**Hardware:**
+
+**Software and Dependencies:**
+
+* Adafruit CircuitPython firmware for the supported boards:
+  https://github.com/adafruit/circuitpython/releases
+
+"""
+
+# imports
+from . import IS31FL3741
+
+
+class Adafruit_RGBMatrixQT(IS31FL3741):
+    """Supports the ISSI IS31FL3741 eval board"""
+
+    width = 13
+    height = 9
+
+    @staticmethod
+    def pixel_addrs(x, y):
+        """Calulate the RGB offsets into the device array for x,y pixel"""
+        col = x
+        row = y
+
+        # remap the row
+        rowmap = [8, 5, 4, 3, 2, 1, 0, 7, 6]
+        row = rowmap[y]
+
+        offset = 0
+
+        if row <= 5:
+            if col < 10:
+                offset = 0x1E*row + col*3
+            else:
+                offset = 0xB4 + 0x5A + 9*row + (col - 10)*3
+        else:
+            if col < 10:
+                offset = 0xB4 + (row-6)*0x1E + col*3
+            else:
+                offset = 0xB4 + 0x5A + 9*row + (col - 10)*3
+            
+        #print(x, ",", y, "->", hex(offset))
+        r_off = 0
+        g_off = 1
+        b_off = 2
+        if col == 12 or col % 2 == 1:  # odds + last col
+            r_off = 2
+            g_off = 1
+            b_off = 0
+        else: # evens
+            r_off = 0
+            g_off = 2
+            b_off = 1
+            
+        return (offset+r_off, offset+g_off, offset+b_off)

examples/is31fl3741_rgbswirl.py

@@ -0,0 +1,30 @@
+"""CircuitPython Essentials I2C Scan example"""
+# If you run this and it seems to hang, try manually unlocking
+# your I2C bus from the REPL with
+#  >>> import board
+#  >>> board.I2C().unlock()
+
+import time
+import board
+import adafruit_is31fl3741
+from rainbowio import colorwheel
+
+#from adafruit_is31fl3741.issi_evb import ISSI_EVB
+from adafruit_is31fl3741.adafruit_rgbmatrixqt import Adafruit_RGBMatrixQT
+
+i2c = board.I2C()
+
+is31 = Adafruit_RGBMatrixQT(i2c)
+is31.set_led_scaling(0xFF)
+is31.global_current = 0xFF
+#print("global current is", is31.global_current)
+is31.enable = True
+#print("Enabled?", is31.enable)
+
+wheeloffset = 0
+while True:
+
+    for y in range (9):
+        for x in range (13):
+            is31.pixel(x, y, colorwheel((y*13 + x)*2 + wheeloffset))
+    wheeloffset += 1