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lib/display/lookuptables.ex
defmodule Inky.LookupTables do
@moduledoc """
LookupTables are used for voltage control when updating the screen.
LookupTables are explained in further detail in https://github.com/pimoroni/inky/blob/master/library/inky/inky.py#L95
"""
@type variant :: :phat | :what
@type accent :: :black | :red | :yellow
@type color :: :white | accent()
@spec get_luts(accent()) :: <<_::560>>
def get_luts(:black) do
<<
# Phase 0 Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 Phase 6
# A B C D A B C D A B C D A B C D A B C D A B C D A B C D
# LUT0 - Black
0b01001000,
0b10100000,
0b00010000,
0b00010000,
0b00010011,
0b00000000,
0b00000000,
# LUTT1 - White
0b01001000,
0b10100000,
0b10000000,
0b00000000,
0b00000011,
0b00000000,
0b00000000,
# IGNORE
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
# LUT3 - Red
0b01001000,
0b10100101,
0b00000000,
0b10111011,
0b00000000,
0b00000000,
0b00000000,
# LUT4 - VCOM
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
# Duration | Repeat
# A B C D |
# 0 Flash
16,
4,
4,
4,
4,
# 1 clear
16,
4,
4,
4,
4,
# 2 bring in the black
4,
8,
8,
16,
16,
# 3 time for red
0,
0,
0,
0,
0,
# 4 final black sharpen phase
0,
0,
0,
0,
0,
# 5
0,
0,
0,
0,
0,
# 6
0,
0,
0,
0,
0
>>
end
def get_luts(:red) do
<<
# Phase 0 Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 Phase 6
# A B C D A B C D A B C D A B C D A B C D A B C D A B C D
# LUT0 - Black
0b01001000,
0b10100000,
0b00010000,
0b00010000,
0b00010011,
0b00000000,
0b00000000,
# LUTT1 - White
0b01001000,
0b10100000,
0b10000000,
0b00000000,
0b00000011,
0b00000000,
0b00000000,
# IGNORE
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
# LUT3 - Red
0b01001000,
0b10100101,
0b00000000,
0b10111011,
0b00000000,
0b00000000,
0b00000000,
# LUT4 - VCOM
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
# Duration | Repeat
# A B C D |
# 0 Flash
64,
12,
32,
12,
6,
# 1 clear
16,
8,
4,
4,
6,
# 2 bring in the black
4,
8,
8,
16,
16,
# 3 time for red
2,
2,
2,
64,
32,
# 4 final black sharpen phase
2,
2,
2,
2,
2,
# 5
0,
0,
0,
0,
0,
# 6
0,
0,
0,
0,
0
>>
end
def get_luts(:yellow) do
<<
# Phase 0 Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 Phase 6
# A B C D A B C D A B C D A B C D A B C D A B C D A B C D
# LUT0 - Black
0b11111010,
0b10010100,
0b10001100,
0b11000000,
0b11010000,
0b00000000,
0b00000000,
# LUTT1 - White
0b11111010,
0b10010100,
0b00101100,
0b10000000,
0b11100000,
0b00000000,
0b00000000,
# IGNORE
0b11111010,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
0b00000000,
# LUT3 - Yellow (or Red)
0b11111010,
0b10010100,
0b11111000,
0b10000000,
0b01010000,
0b00000000,
0b11001100,
# LUT4 - VCOM
0b10111111,
0b01011000,
0b11111100,
0b10000000,
0b11010000,
0b00000000,
0b00010001,
# Duration | Repeat
# A B C D |
64,
16,
64,
16,
8,
8,
16,
4,
4,
16,
8,
8,
3,
8,
32,
8,
4,
0,
0,
16,
16,
8,
8,
0,
32,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
>>
end
end