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Update st7789 driver for greyscale.

pull/48/head
Peter Hinch 2024-06-07 10:53:25 +01:00
rodzic c282cfa6c9
commit 00c5edaf16
1 zmienionych plików z 24 dodań i 9 usunięć
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33
drivers/st7789/st7789_4bit.py
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@ -37,15 +37,22 @@ WAVESHARE_13 = (0, 0, 16) # Waveshare 1.3" 240x240 LCD contributed by Aaron Mit
@micropython.viper @micropython.viper
def _lcopy(dest: ptr16, source: ptr8, lut: ptr16, length: int): def _lcopy(dest: ptr16, source: ptr8, lut: ptr16, length: int, gscale: bool):
# rgb565 - 16bit/pixel # rgb565 - 16bit/pixel
n: int = 0 n: int = 0
x: int = 0 x: int = 0
while length: while length:
c = source[x] c = source[x]
dest[n] = lut[c >> 4] # current pixel p = c >> 4 # current pixel
n += 1 q = c & 0x0F # next pixel
dest[n] = lut[c & 0x0F] # next pixel if gscale:
dest[n] = (p >> 1 | p << 4 | p << 9 | ((p & 0x01) << 15)) ^ 0xFFFF
n += 1
dest[n] = (q >> 1 | q << 4 | q << 9 | ((q & 0x01) << 15)) ^ 0xFFFF
else:
dest[n] = lut[p] # current pixel
n += 1
dest[n] = lut[q] # next pixel
n += 1 n += 1
x += 1 x += 1
length -= 1 length -= 1
@ -88,11 +95,12 @@ class ST7789(framebuf.FrameBuffer):
orientation = display[2] # where x, y is the RAM offset orientation = display[2] # where x, y is the RAM offset
self._spi_init = init_spi # Possible user callback self._spi_init = init_spi # Possible user callback
self._lock = asyncio.Lock() self._lock = asyncio.Lock()
self._gscale = False # Interpret buffer as index into color LUT
mode = framebuf.GS4_HMSB # Use 4bit greyscale. mode = framebuf.GS4_HMSB # Use 4bit greyscale.
self.palette = BoolPalette(mode) self.palette = BoolPalette(mode)
gc.collect() gc.collect()
buf = bytearray(height * -(-width // 2)) # Ceiling division for odd widths buf = bytearray(height * -(-width // 2)) # Ceiling division for odd widths
self._mvb = memoryview(buf) self.mvb = memoryview(buf)
super().__init__(buf, width, height, mode) super().__init__(buf, width, height, mode)
self._linebuf = bytearray(self.width * 2) # 16 bit color out self._linebuf = bytearray(self.width * 2) # 16 bit color out
self._init(disp_mode, orientation) self._init(disp_mode, orientation)
@ -206,6 +214,11 @@ class ST7789(framebuf.FrameBuffer):
# Row address set # Row address set
self._wcd(b"\x2b", int.to_bytes((ys << 16) + ye, 4, "big")) self._wcd(b"\x2b", int.to_bytes((ys << 16) + ye, 4, "big"))
def greyscale(self, gs=None):
if gs is not None:
self._gscale = gs
return self._gscale
# @micropython.native # Made virtually no difference to timing. # @micropython.native # Made virtually no difference to timing.
def show(self): # Blocks for 83ms @60MHz SPI def show(self): # Blocks for 83ms @60MHz SPI
# Blocks for 60ms @30MHz SPI on TTGO in PORTRAIT mode # Blocks for 60ms @30MHz SPI on TTGO in PORTRAIT mode
@ -215,7 +228,8 @@ class ST7789(framebuf.FrameBuffer):
wd = -(-self.width // 2) # Ceiling division for odd number widths wd = -(-self.width // 2) # Ceiling division for odd number widths
end = self.height * wd end = self.height * wd
lb = memoryview(self._linebuf) lb = memoryview(self._linebuf)
buf = self._mvb cm = self._gscale # color False, greyscale True
buf = self.mvb
if self._spi_init: # A callback was passed if self._spi_init: # A callback was passed
self._spi_init(self._spi) # Bus may be shared self._spi_init(self._spi) # Bus may be shared
self._dc(0) self._dc(0)
@ -223,7 +237,7 @@ class ST7789(framebuf.FrameBuffer):
self._spi.write(b"\x2c") # RAMWR self._spi.write(b"\x2c") # RAMWR
self._dc(1) self._dc(1)
for start in range(0, end, wd): for start in range(0, end, wd):
_lcopy(lb, buf[start:], clut, wd) # Copy and map colors _lcopy(lb, buf[start:], clut, wd, cm) # Copy and map colors
self._spi.write(lb) self._spi.write(lb)
self._cs(1) self._cs(1)
# print(ticks_diff(ticks_us(), ts)) # print(ticks_diff(ticks_us(), ts))
@ -237,7 +251,8 @@ class ST7789(framebuf.FrameBuffer):
clut = ST7789.lut clut = ST7789.lut
wd = -(-self.width // 2) wd = -(-self.width // 2)
lb = memoryview(self._linebuf) lb = memoryview(self._linebuf)
buf = self._mvb cm = self._gscale # color False, greyscale True
buf = self.mvb
line = 0 line = 0
for n in range(split): for n in range(split):
if self._spi_init: # A callback was passed if self._spi_init: # A callback was passed
@ -247,7 +262,7 @@ class ST7789(framebuf.FrameBuffer):
self._spi.write(b"\x3c" if n else b"\x2c") # RAMWR/Write memory continue self._spi.write(b"\x3c" if n else b"\x2c") # RAMWR/Write memory continue
self._dc(1) self._dc(1)
for start in range(wd * line, wd * (line + lines), wd): for start in range(wd * line, wd * (line + lines), wd):
_lcopy(lb, buf[start:], clut, wd) # Copy and map colors _lcopy(lb, buf[start:], clut, wd, cm) # Copy and map colors
self._spi.write(lb) self._spi.write(lb)
line += lines line += lines
self._cs(1) self._cs(1)