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add support for ST7789V variant #38

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add support for ST7789V variant #38

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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
[![PyPi Package](https://img.shields.io/pypi/v/st7789.svg)](https://pypi.python.org/pypi/st7789)
[![Python Versions](https://img.shields.io/pypi/pyversions/st7789.svg)](https://pypi.python.org/pypi/st7789)

Python library to control an ST7789 TFT LCD display
Python library to control an ST7789 or ST7789V TFT LCD display

Designed specifically to work with a ST7789 based 240x240 pixel TFT SPI display. (Specifically the [1.3" SPI LCD from Pimoroni](https://shop.pimoroni.com/products/1-3-spi-colour-lcd-240x240-breakout)).

Expand Down
123 changes: 93 additions & 30 deletions st7789/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,9 @@
ST7789_PWCTR6 = 0xFC


VARIANT_ST7789 = 1
VARIANT_ST7789V = 2

class ST7789(object):
"""Representation of an ST7789 TFT LCD."""

Expand All @@ -107,6 +110,7 @@ def __init__(
spi_speed_hz=4000000,
offset_left=0,
offset_top=0,
variant=VARIANT_ST7789,
):
"""Create an instance of the display using SPI communication.

Expand All @@ -123,6 +127,7 @@ def __init__(
:param rotation: Rotation of display connected to ST7789
:param invert: Invert display
:param spi_speed_hz: SPI speed (in Hz)
:param variant: Display variant [ST7789, ST7789V]

"""
if rotation not in [0, 90, 180, 270]:
Expand Down Expand Up @@ -171,6 +176,10 @@ def __init__(
self._rst = ST7789.get_rst_pin(rst)
self.reset()

if variant not in [VARIANT_ST7789, VARIANT_ST7789V]:
raise ValueError(f"Invalid variant {variant}")
self._variant = variant

self._init()

def set_pin(self, pin, state):
Expand Down Expand Up @@ -239,7 +248,10 @@ def _init(self):
time.sleep(0.150) # delay 150 ms

self.command(ST7789_MADCTL)
self.data(0x70)
if self._variant == VARIANT_ST7789:
self.data(0x70)
elif self._variant == VARIANT_ST7789V:
self.data(0x00)

self.command(ST7789_FRMCTR2) # Frame rate ctrl - idle mode
self.data(0x0C)
Expand All @@ -255,7 +267,10 @@ def _init(self):
self.data(0x14)

self.command(ST7789_VCOMS)
self.data(0x37)
if self._variant == VARIANT_ST7789:
self.data(0x37)
elif self._variant == VARIANT_ST7789V:
self.data(0x1F)

self.command(ST7789_LCMCTRL) # Power control
self.data(0x2C)
Expand All @@ -277,36 +292,81 @@ def _init(self):
self.data(0x0F)

self.command(ST7789_GMCTRP1) # Set Gamma
self.data(0xD0)
self.data(0x04)
self.data(0x0D)
self.data(0x11)
self.data(0x13)
self.data(0x2B)
self.data(0x3F)
self.data(0x54)
self.data(0x4C)
self.data(0x18)
self.data(0x0D)
self.data(0x0B)
self.data(0x1F)
self.data(0x23)
if self._variant == VARIANT_ST7789:
self.data(0x04)
self.data(0xD0)
self.data(0x0D)
self.data(0x04)
self.data(0x11)
self.data(0x0D)
self.data(0x13)
self.data(0x11)
self.data(0x2B)
self.data(0x13)
self.data(0x3F)
self.data(0x2B)
self.data(0x54)
self.data(0x3F)
self.data(0x4C)
self.data(0x54)
self.data(0x18)
self.data(0x4C)
self.data(0x0D)
self.data(0x18)
self.data(0x0B)
self.data(0x0D)
self.data(0x1F)
self.data(0x0B)
self.data(0x23)
self.data(0x1F)
self.data(0x23)
elif self._variant == VARIANT_ST7789V:
self.data(0xD0)
self.data(0x08)
self.data(0x11)
self.data(0x08)
self.data(0x0C)
self.data(0x15)
self.data(0x39)
self.data(0x33)
self.data(0x50)
self.data(0x36)
self.data(0x13)
self.data(0x14)
self.data(0x29)
self.data(0x2D)

self.command(ST7789_GMCTRN1) # Set Gamma
self.data(0xD0)
self.data(0x04)
self.data(0x0C)
self.data(0x11)
self.data(0x13)
self.data(0x2C)
self.data(0x3F)
self.data(0x44)
self.data(0x51)
self.data(0x2F)
self.data(0x1F)
self.data(0x1F)
self.data(0x20)
self.data(0x23)
if self._variant == VARIANT_ST7789:
self.data(0xD0)
self.data(0x04)
self.data(0x0C)
self.data(0x11)
self.data(0x13)
self.data(0x2C)
self.data(0x3F)
self.data(0x44)
self.data(0x51)
self.data(0x2F)
self.data(0x1F)
self.data(0x1F)
self.data(0x20)
self.data(0x23)
elif self._variant == VARIANT_ST7789V:
self.data(0xD0)
self.data(0x08)
self.data(0x10)
self.data(0x08)
self.data(0x06)
self.data(0x06)
self.data(0x39)
self.data(0x44)
self.data(0x51)
self.data(0x0B)
self.data(0x16)
self.data(0x14)
self.data(0x2F)
self.data(0x31)

if self._invert:
self.command(ST7789_INVON) # Invert display
Expand Down Expand Up @@ -363,6 +423,9 @@ def display(self, image):
:param image: Should be RGB format and the same dimensions as the display hardware.

"""
if self._variant == VARIANT_ST7789V:
self.command(ST7789_MADCTL)
self.data(0x70)
# Set address bounds to entire display.
self.set_window()

Expand Down