From 53bbdd8e342acbe59b3f7758adf0eb218b923a53 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Thu, 19 May 2022 21:45:02 +0200
Subject: [PATCH 1/6] Implement grayscale support

---
 adafruit_uc8151d.py | 63 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 59 insertions(+), 4 deletions(-)

diff --git a/adafruit_uc8151d.py b/adafruit_uc8151d.py
index 6e8d00a..403b035 100644
--- a/adafruit_uc8151d.py
+++ b/adafruit_uc8151d.py
@@ -38,15 +38,65 @@
     b"\x50\x01\x97"  # CDI setting
 )
 
+_GRAYSCALE_START_SEQUENCE  = (
+    b"\x04\x80\xc8" # Power on
+    b"\x00\x01\xbf" # Panel setting
+    b"\x50\x01\x97"  # CDI setting
+    # Common voltage
+    b"\x20\x2a"
+    b"\x00\x0A\x00\x00\x00\x01"
+    b"\x60\x14\x14\x00\x00\x01"
+    b"\x00\x14\x00\x00\x00\x01"
+    b"\x00\x13\x0A\x01\x00\x01"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    # White to White
+    b"\x21\x2a"
+    b"\x40\x0A\x00\x00\x00\x01"
+    b"\x90\x14\x14\x00\x00\x01"
+    b"\x10\x14\x0A\x00\x00\x01"
+    b"\xA0\x13\x01\x00\x00\x01"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    # Black to White
+    b"\x22\x2a"
+    b"\x40\x0A\x00\x00\x00\x01"
+    b"\x90\x14\x14\x00\x00\x01"
+    b"\x00\x14\x0A\x00\x00\x01"
+    b"\x99\x0B\x04\x04\x01\x01"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    # White to Black
+    b"\x23\x2a"
+    b"\x40\x0A\x00\x00\x00\x01"
+    b"\x90\x14\x14\x00\x00\x01"
+    b"\x00\x14\x0A\x00\x00\x01"
+    b"\x99\x0C\x01\x03\x04\x01"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    # Black to Black
+    b"\x24\x2a"
+    b"\x80\x0A\x00\x00\x00\x01"
+    b"\x90\x14\x14\x00\x00\x01"
+    b"\x20\x14\x0A\x00\x00\x01"
+    b"\x50\x13\x01\x00\x00\x01"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+    b"\x00\x00\x00\x00\x00\x00"
+)
+
+
 _STOP_SEQUENCE = b"\x50\x01\xf7" b"\x07\x01\xA5"  # CDI setting  # Deep Sleep
 # pylint: disable=too-few-public-methods
 class UC8151D(displayio.EPaperDisplay):
     r"""UC8151D driver
-
     :param bus: The data bus the display is on
     :param \**kwargs:
         See below
-
     :Keyword Arguments:
         * *width* (``int``) --
           Display width
@@ -57,6 +107,11 @@ class UC8151D(displayio.EPaperDisplay):
     """
 
     def __init__(self, bus, **kwargs):
+        if kwargs.get("grayscale", False):
+            print("grayscale is true")
+            start_sequence = bytearray(_GRAYSCALE_START_SEQUENCE)
+        else:
+            start_sequence = bytearray(_START_SEQUENCE)
         width = kwargs["width"]
         height = kwargs["height"]
         if "rotation" in kwargs and kwargs["rotation"] % 180 != 0:
@@ -64,7 +119,7 @@ def __init__(self, bus, **kwargs):
 
         super().__init__(
             bus,
-            _START_SEQUENCE,
+            start_sequence,
             _STOP_SEQUENCE,
             **kwargs,
             ram_width=128,
@@ -73,4 +128,4 @@ def __init__(self, bus, **kwargs):
             write_black_ram_command=0x13,
             write_color_ram_command=0x10,
             refresh_display_command=0x12,
-        )
+        )
\ No newline at end of file

From 282643cf3b1f91c955613c484604c4b84c16c9e5 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Thu, 19 May 2022 22:04:56 +0200
Subject: [PATCH 2/6] Remove print used for debugging

---
 adafruit_uc8151d.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/adafruit_uc8151d.py b/adafruit_uc8151d.py
index 403b035..dced49b 100644
--- a/adafruit_uc8151d.py
+++ b/adafruit_uc8151d.py
@@ -108,7 +108,6 @@ class UC8151D(displayio.EPaperDisplay):
 
     def __init__(self, bus, **kwargs):
         if kwargs.get("grayscale", False):
-            print("grayscale is true")
             start_sequence = bytearray(_GRAYSCALE_START_SEQUENCE)
         else:
             start_sequence = bytearray(_START_SEQUENCE)

From f662c7a356f7d3663d1cd95c553afc9c4a6c4fa8 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Fri, 20 May 2022 19:49:24 +0200
Subject: [PATCH 3/6] Update adafruit_uc8151d.py

---
 adafruit_uc8151d.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/adafruit_uc8151d.py b/adafruit_uc8151d.py
index dced49b..c7d9dd7 100644
--- a/adafruit_uc8151d.py
+++ b/adafruit_uc8151d.py
@@ -38,9 +38,9 @@
     b"\x50\x01\x97"  # CDI setting
 )
 
-_GRAYSCALE_START_SEQUENCE  = (
-    b"\x04\x80\xc8" # Power on
-    b"\x00\x01\xbf" # Panel setting
+_GRAYSCALE_START_SEQUENCE = (
+    b"\x04\x80\xc8"  # Power on
+    b"\x00\x01\xbf"  # Panel setting
     b"\x50\x01\x97"  # CDI setting
     # Common voltage
     b"\x20\x2a"
@@ -127,4 +127,4 @@ def __init__(self, bus, **kwargs):
             write_black_ram_command=0x13,
             write_color_ram_command=0x10,
             refresh_display_command=0x12,
-        )
\ No newline at end of file
+        )

From 6c30c9b4cddbc0c02818b6399db0046059f28202 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Fri, 20 May 2022 20:04:38 +0200
Subject: [PATCH 4/6] Update adafruit_uc8151d.py

---
 adafruit_uc8151d.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/adafruit_uc8151d.py b/adafruit_uc8151d.py
index c7d9dd7..cf310d5 100644
--- a/adafruit_uc8151d.py
+++ b/adafruit_uc8151d.py
@@ -94,9 +94,11 @@
 # pylint: disable=too-few-public-methods
 class UC8151D(displayio.EPaperDisplay):
     r"""UC8151D driver
+
     :param bus: The data bus the display is on
     :param \**kwargs:
         See below
+
     :Keyword Arguments:
         * *width* (``int``) --
           Display width

From 8de852277679751c787a3262e70cfaf27d1b5949 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Sat, 21 May 2022 17:56:34 +0200
Subject: [PATCH 5/6] Add example for grayscale displays

---
 examples/uc8151d_grayscale_test.py | 56 ++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 examples/uc8151d_grayscale_test.py

diff --git a/examples/uc8151d_grayscale_test.py b/examples/uc8151d_grayscale_test.py
new file mode 100644
index 0000000..7e1c678
--- /dev/null
+++ b/examples/uc8151d_grayscale_test.py
@@ -0,0 +1,56 @@
+import time
+import board
+import displayio
+import busio
+import adafruit_uc8151d
+
+displayio.release_displays()
+
+clk = board.GP10
+si = board.GP11
+dc = board.GP8
+cs = board.GP9
+rst = board.GP12
+busy = board.GP13
+
+display_bus = displayio.FourWire(
+    busio.SPI(clk, si), command=dc, chip_select=cs, reset=rst, baudrate=1000000
+)
+
+time.sleep(1)
+
+display = adafruit_uc8151d.UC8151D(
+    display_bus, width=152, height=152, busy_pin=busy, rotation=180, grayscale=True
+)
+
+
+bitmap = displayio.Bitmap(152, 152, 4)
+
+# Draw Black
+for x in range(0,152):
+    for y in range(0,38):
+        bitmap[x, y] = 0
+#Draw Dark Gray
+for x in range(0,152):
+    for y in range(38,76):
+        bitmap[x, y] = 1
+#Draw Light Gray
+for x in range(0,152):
+    for y in range(76,114):
+        bitmap[x, y] = 2
+#Draw White
+for x in range(0,152):
+    for y in range(114,152):
+        bitmap[x, y] = 3
+
+palette = displayio.Palette(4)
+palette[0] = 0x000000 # Black
+palette[1] = 0x404040 # Dark Gray
+palette[2] = 0x808080 # Light Gray
+palette[3] = 0xFFFFFF # White
+
+g = displayio.Group()
+t = displayio.TileGrid(bitmap, pixel_shader=palette)
+g.append(t)
+display.show(g)
+display.refresh()
\ No newline at end of file

From 42c745b3b6f89354c83756be4eceea2578437dd5 Mon Sep 17 00:00:00 2001
From: Martin Refseth <20230450+HDR@users.noreply.github.com>
Date: Sat, 21 May 2022 18:05:12 +0200
Subject: [PATCH 6/6] Add Copyrighttext and license identifier

---
 examples/uc8151d_grayscale_test.py | 44 +++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 16 deletions(-)

diff --git a/examples/uc8151d_grayscale_test.py b/examples/uc8151d_grayscale_test.py
index 7e1c678..71b8316 100644
--- a/examples/uc8151d_grayscale_test.py
+++ b/examples/uc8151d_grayscale_test.py
@@ -1,3 +1,14 @@
+# SPDX-FileCopyrightText: 2022 Martin Refseth, written for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""Simple test script for 1.54" 152x152 grayscale display.
+
+Supported products:
+  * 1.54" Grayscale Display (GDEW0154T8D)
+  """
+# pylint: disable=no-member
+
 import time
 import board
 import displayio
@@ -6,6 +17,7 @@
 
 displayio.release_displays()
 
+# Pinout intended for use with a Raspberry Pi Pico
 clk = board.GP10
 si = board.GP11
 dc = board.GP8
@@ -27,30 +39,30 @@
 bitmap = displayio.Bitmap(152, 152, 4)
 
 # Draw Black
-for x in range(0,152):
-    for y in range(0,38):
+for x in range(0, 152):
+    for y in range(0, 38):
         bitmap[x, y] = 0
-#Draw Dark Gray
-for x in range(0,152):
-    for y in range(38,76):
+# Draw Dark Gray
+for x in range(0, 152):
+    for y in range(38, 76):
         bitmap[x, y] = 1
-#Draw Light Gray
-for x in range(0,152):
-    for y in range(76,114):
+# Draw Light Gray
+for x in range(0, 152):
+    for y in range(76, 114):
         bitmap[x, y] = 2
-#Draw White
-for x in range(0,152):
-    for y in range(114,152):
+# Draw White
+for x in range(0, 152):
+    for y in range(114, 152):
         bitmap[x, y] = 3
 
 palette = displayio.Palette(4)
-palette[0] = 0x000000 # Black
-palette[1] = 0x404040 # Dark Gray
-palette[2] = 0x808080 # Light Gray
-palette[3] = 0xFFFFFF # White
+palette[0] = 0x000000  # Black
+palette[1] = 0x404040  # Dark Gray
+palette[2] = 0x808080  # Light Gray
+palette[3] = 0xFFFFFF  # White
 
 g = displayio.Group()
 t = displayio.TileGrid(bitmap, pixel_shader=palette)
 g.append(t)
 display.show(g)
-display.refresh()
\ No newline at end of file
+display.refresh()