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ILI9341: Provide fix for some Chinese display modules.

pull/9/merge
peterhinch 2023-03-20 17:04:10 +00:00
rodzic 032a9ba4be
commit 597ab5ef3f
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9
DRIVERS.md
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@ -416,6 +416,13 @@ training makes me baulk at exceeding datasheet limits but the choice is yours.
I raised [this isse](https://github.com/adafruit/Adafruit_CircuitPython_ILI9341/issues/24). I raised [this isse](https://github.com/adafruit/Adafruit_CircuitPython_ILI9341/issues/24).
The response may be of interest. The response may be of interest.
#### Troubleshooting
Some Chinese modules produce garbled displays. Please try the
[ILI9486 driver](./DRIVERS.md#34-driver-for-ili94xx) with the `mirror`
constructor arg set `True`. Patch and testing provided by
[Abel Deuring](https://github.com/peterhinch/micropython-micro-gui/issues/25#issuecomment-1475329104).
###### [Contents](./DRIVERS.md#contents) ###### [Contents](./DRIVERS.md#contents)
## 3.3 Drivers for ST7789 ## 3.3 Drivers for ST7789
@ -709,6 +716,8 @@ powered from 5V or 3.3V: there is a regulator on board.
`height` and `width` values. `height` and `width` values.
* `width=480` * `width=480`
* `usd=False` Upside down: set `True` to invert display. * `usd=False` Upside down: set `True` to invert display.
* `mirror=False` If `True` reflects display. Has been found necessary for some
Chinese ILI9341 modules.
* `init_spi=False` This optional arg enables flexible options in configuring * `init_spi=False` This optional arg enables flexible options in configuring
the SPI bus. The default assumes exclusive access to the bus. In this normal the SPI bus. The default assumes exclusive access to the bus. In this normal
case, `color_setup.py` initialises it and the settings will be left in place. case, `color_setup.py` initialises it and the settings will be left in place.

8
drivers/ili94xx/ili9486.py
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@ -66,7 +66,7 @@ class ILI9486(framebuf.FrameBuffer):
return cls.COLOR_INVERT ^ ((r & 0xF8) | (g & 0xE0) >> 5 | (g & 0x1C) << 11 | (b & 0xF8) << 5) return cls.COLOR_INVERT ^ ((r & 0xF8) | (g & 0xE0) >> 5 | (g & 0x1C) << 11 | (b & 0xF8) << 5)
# Transpose width & height for landscape mode # Transpose width & height for landscape mode
def __init__(self, spi, cs, dc, rst, height=320, width=480, usd=False, init_spi=False): def __init__(self, spi, cs, dc, rst, height=320, width=480, usd=False, mirror=False, init_spi=False):
self._spi = spi self._spi = spi
self._cs = cs self._cs = cs
self._dc = dc self._dc = dc
@ -107,7 +107,11 @@ class ILI9486(framebuf.FrameBuffer):
# Default page address start == 0 end == 0x1DF (479) # Default page address start == 0 end == 0x1DF (479)
if self._long != 480: if self._long != 480:
self._wcd(b"\x2b", int.to_bytes(self._long - 1, 4, "big")) # SET_PAGE ht self._wcd(b"\x2b", int.to_bytes(self._long - 1, 4, "big")) # SET_PAGE ht
self._wcd(b"\x36", b"\x48" if usd else b"\x88") # MADCTL: RGB portrait mode # self._wcd(b"\x36", b"\x48" if usd else b"\x88") # MADCTL: RGB portrait mode
madctl = 0x48 if usd else 0x88
if mirror:
madctl ^= 0x80
self._wcd(b"\x36", madctl.to_bytes(1, 'big')) # MADCTL: RGB portrait mode
self._wcmd(b"\x11") # sleep out self._wcmd(b"\x11") # sleep out
self._wcmd(b"\x29") # display on self._wcmd(b"\x29") # display on