kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
drivers/ili9488: Update with optimisations fom cpottle.
Peter Hinch
rodzic
08f2429ba4
commit
4b37e6051e
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@ -22,122 +22,64 @@ import framebuf
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import asyncio
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from drivers.boolpalette import BoolPalette
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# Portrait mode greyscale
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# Do processing from end to beginning for
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# small performance improvement.
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# greyscale
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@micropython.viper
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def _lcopy_gs(dest: ptr8, source: ptr8, length: int):
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def _lcopy_gs(dest: ptr8, source: ptr8, length: int) :
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# rgb666 - 18bit/pixel
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n: int = 0
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x: int = 0
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while x < length:
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c: uint = source[x]
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n: int = length * 6 - 1
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while length:
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length -= 1
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c : uint = source[length]
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# Store the index in the 4 high order bits
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p: uint = c & 0xF0 # current pixel
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q: uint = c << 4 # next pixel
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dest[n] = p
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n += 1
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dest[n] = p
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n += 1
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dest[n] = p
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n += 1
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p : uint = c & 0xF0 # current pixel
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q : uint = c << 4 # next pixel
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dest[n] = q
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n += 1
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n -= 1
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dest[n] = q
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n += 1
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dest[n] = q
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n += 1
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n -= 1
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dest[n] = q
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n -= 1
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x += 1
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dest[n] = p
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n -= 1
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dest[n] = p
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n -= 1
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dest[n] = p
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n -= 1
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# Portrait mode color
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# Do processing from end to beginning for
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# small performance improvement.
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# color
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@micropython.viper
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def _lcopy(dest: ptr8, source: ptr8, lut: ptr16, length: int):
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def _lcopy(dest: ptr8, source: ptr8, lut: ptr16, length: int) :
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# Convert lut rgb 565 to rgb666
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n: int = 0
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x: int = 0
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while x < length:
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c: uint = source[x]
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p: uint = c >> 4 # current pixel
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q = c & 0x0F # next pixel
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n: int = length * 6 - 1
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while length:
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length -= 1
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c : uint = source[length]
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v: uint16 = lut[p]
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dest[n] = (v & 0xF800) >> 8 # R
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n += 1
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dest[n] = (v & 0x07E0) >> 3 # G
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n += 1
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v = lut[c & 0x0F] # next pixel
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dest[n] = (v & 0x001F) << 3 # B
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n += 1
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v = lut[q]
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dest[n] = (v & 0xF800) >> 8 # R
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n += 1
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n -= 1
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dest[n] = (v & 0x07E0) >> 3 # G
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n += 1
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dest[n] = (v & 0x001F) << 3 # B
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n += 1
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x += 1
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# FB is in landscape mode greyscale
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@micropython.viper
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def _lscopy_gs(dest: ptr8, source: ptr8, ch: int):
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col = ch & 0x1FF # Unpack (viper old 4 parameter limit)
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height = (ch >> 9) & 0x1FF
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wbytes = ch >> 19 # Width in bytes is width // 2
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# rgb666 - 18bit/pixel
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n = 0
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clsb = col & 1
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idx = col >> 1 # 2 pixels per byte
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while height:
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if clsb:
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c = source[idx] << 4
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else:
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c = source[idx] & 0xF0
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dest[n] = c
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n += 1
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dest[n] = c
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n += 1
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dest[n] = c
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n += 1
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idx += wbytes
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height -= 1
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# FB is in landscape mode color, hence issue a column at a time to portrait mode hardware.
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@micropython.viper
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def _lscopy(dest: ptr8, source: ptr8, lut: ptr16, ch: int):
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# Convert lut rgb 565 to rgb666
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col = ch & 0x1FF # Unpack (viper old 4 parameter limit)
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height = (ch >> 9) & 0x1FF
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wbytes = ch >> 19 # Width in bytes is width // 2
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n = 0
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clsb = col & 1
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idx = col >> 1 # 2 pixels per byte
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while height:
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if clsb:
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c = source[idx] & 0x0F
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else:
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c = source[idx] >> 4
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v: uint16 = lut[c]
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n -= 1
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dest[n] = (v & 0xF800) >> 8 # R
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n += 1
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dest[n] = (v & 0x07E0) >> 3 # G
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n += 1
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n -= 1
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v : uint = lut[c >> 4] # current pixel
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dest[n] = (v & 0x001F) << 3 # B
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n += 1
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idx += wbytes
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height -= 1
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n -= 1
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dest[n] = (v & 0x07E0) >> 3 # G
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n -= 1
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dest[n] = (v & 0xF800) >> 8 # R
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n -= 1
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class ILI9488(framebuf.FrameBuffer):
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lut = bytearray(32)
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COLOR_INVERT = 0
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# Convert r, g, b in range 0-255 to a 16 bit colour value
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@ -149,7 +91,8 @@ class ILI9488(framebuf.FrameBuffer):
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# Transpose width & height for landscape mode
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def __init__(
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self, spi, cs, dc, rst, height=320, width=480, usd=False, mirror=False, init_spi=False
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self, spi, cs, dc, rst, height=320, width=480, usd=False, mirror=False, init_spi=False,
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lines_per_write=4
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):
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self._spi = spi
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self._cs = cs
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@ -158,17 +101,21 @@ class ILI9488(framebuf.FrameBuffer):
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self.lock_mode = False # If set, user lock is passed to .do_refresh
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self.height = height # Logical dimensions for GUIs
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self.width = width
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self._long = max(height, width) # Physical dimensions of screen and aspect ratio
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self._short = min(height, width)
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self._spi_init = init_spi
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self._gscale = False # Interpret buffer as index into color LUT
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self.mode = framebuf.GS4_HMSB
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self.palette = BoolPalette(self.mode)
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#
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# lines_per_write must divide evenly into height
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#
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if (self.height % lines_per_write) != 0 :
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raise ValueError('lines_per_write invalid')
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self._lines_per_write=lines_per_write
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gc.collect()
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buf = bytearray(height * width // 2)
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self.mvb = memoryview(buf)
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super().__init__(buf, width, height, self.mode) # Logical aspect ratio
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self._linebuf = bytearray(self._short * 3)
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self._linebuf = bytearray(self._lines_per_write*self.width * 3)
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# Hardware reset
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self._rst(0)
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@ -185,18 +132,18 @@ class ILI9488(framebuf.FrameBuffer):
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self._wcmd(b"\x11") # sleep out
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sleep_ms(20)
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self._wcd(b"\x3a", b"\x66") # interface pixel format 18 bits per pixel
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# Normally use defaults. This allows it to work on the Waveshare board with a
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# shift register. If size is not 320x480 assume no shift register.
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# Default column address start == 0, end == 0x13F (319)
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if self._short != 320: # Not the Waveshare board: no shift register
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self._wcd(b"\x2a", int.to_bytes(self._short - 1, 4, "big"))
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# Default page address start == 0 end == 0x1DF (479)
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if self._long != 480:
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self._wcd(b"\x2b", int.to_bytes(self._long - 1, 4, "big")) # SET_PAGE ht
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# self._wcd(b"\x36", b"\x48" if usd else b"\x88") # MADCTL: RGB portrait mode
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madctl = 0x48 if usd else 0x88
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self._wcd(b"\x2a", int.to_bytes(self.width - 1, 4, "big"))
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self._wcd(b"\x2b", int.to_bytes(self.height - 1, 4, "big")) # SET_PAGE ht
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if self.width > self.height :
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# landscape
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madctl = 0xe8 if usd else 0x28
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else :
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#portrait
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madctl = 0x48 if usd else 0x88
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if mirror:
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madctl ^= 0x80
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madctl ^= 0x80 # toggle MY
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self._wcd(b"\x36", madctl.to_bytes(1, "big")) # MADCTL: RGB portrait mode
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self._wcmd(b"\x11") # sleep out
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self._wcmd(b"\x29") # display on
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@ -226,7 +173,6 @@ class ILI9488(framebuf.FrameBuffer):
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# @micropython.native # Made almost no difference to timing
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def show(self): # Physical display is in portrait mode
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clut = ILI9488.lut
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lb = self._linebuf
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buf = self.mvb
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cm = self._gscale # color False, greyscale True
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@ -235,30 +181,22 @@ class ILI9488(framebuf.FrameBuffer):
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self._wcmd(b"\x2c") # WRITE_RAM
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self._dc(1)
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self._cs(0)
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if self.width < self.height: # Portrait 350 ms on ESP32 160 MHz, 26.6 MHz SPI clock
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wd = self.width // 2
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ht = self.height
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if cm:
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for start in range(0, wd * ht, wd): # For each line
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_lcopy_gs(lb, buf[start:], wd) # Copy greyscale
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self._spi.write(lb)
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else:
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for start in range(0, wd * ht, wd): # For each line
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_lcopy(lb, buf[start:], clut, wd) # Copy and map colors
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self._spi.write(lb)
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else: # Landscape 370 ms on ESP32 160 MHz, 26.6 MHz SPI clock
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width = self.width
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wd = width - 1
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cargs = (self.height << 9) + (width << 18) # Viper 4-arg limit
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if cm:
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for col in range(width): # For each column of landscape display
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_lscopy_gs(lb, buf, wd - col + cargs) # Copy greyscale
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self._spi.write(lb)
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else:
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for col in range(width): # For each column of landscape display
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_lscopy(lb, buf, clut, wd - col + cargs) # Copy and map colors
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self._spi.write(lb)
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wd = self.width >> 1
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ht = self.height
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spi_write = self._spi.write
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length = self._lines_per_write*wd
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r = range(0, wd * ht, length)
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if cm :
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lcopy = _lcopy_gs # Copy greyscale
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for start in r : # For each line
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lcopy(lb, buf[start:], length)
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spi_write(lb)
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else :
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clut = ILI9488.lut
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lcopy = _lcopy # Copy and map colors
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for start in r : # For each line
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lcopy(lb, buf[start:], clut, length)
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spi_write(lb)
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self._cs(1)
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def short_lock(self, v=None):
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@ -272,58 +210,38 @@ class ILI9488(framebuf.FrameBuffer):
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if elock is None:
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elock = asyncio.Lock()
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async with self._lock:
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lines, mod = divmod(self._long, split) # Lines per segment
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lines, mod = divmod(self.height, split) # Lines per segment
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if mod:
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raise ValueError("Invalid do_refresh arg.")
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raise ValueError("Invalid do_refresh arg 'split'")
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if lines % self._lines_per_write != 0 :
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raise ValueError("Invalid do_refresh arg 'split' for lines_per_write of %d" %(self._lines_per_write))
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clut = ILI9488.lut
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lb = self._linebuf
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buf = self.mvb
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cm = self._gscale # color False, greyscale True
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self._wcmd(b"\x2c") # WRITE_RAM
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self._dc(1)
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if self.width < self.height: # Portrait: write sets of rows
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wd = self.width // 2
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line = 0
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for _ in range(split): # For each segment
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async with elock:
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if self._spi_init: # A callback was passed
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self._spi_init(self._spi) # Bus may be shared
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self._cs(0)
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if cm:
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for start in range(
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wd * line, wd * (line + lines), wd
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): # For each line
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_lcopy_gs(lb, buf[start:], wd) # Copy and greyscale
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self._spi.write(lb)
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else:
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for start in range(
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wd * line, wd * (line + lines), wd
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): # For each line
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_lcopy(lb, buf[start:], clut, wd) # Copy and map colors
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self._spi.write(lb)
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wd = self.width // 2
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line = 0
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spi_write = self._spi.write
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length = self._lines_per_write*wd
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for _ in range(split): # For each segment
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async with elock:
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if self._spi_init: # A callback was passed
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self._spi_init(self._spi) # Bus may be shared
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self._cs(0)
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r = range(wd * line, wd * (line + lines), length)
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if cm:
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lcopy = _lcopy_gs # Copy and greyscale
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for start in r :
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lcopy(lb, buf[start:], length)
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spi_write(lb)
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else :
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lcopy = _lcopy # Copy and map colors
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for start in r :
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lcopy(lb, buf[start:], clut, length)
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spi_write(lb)
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line += lines
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self._cs(1) # Allow other tasks to use bus
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await asyncio.sleep_ms(0)
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else: # Landscape: write sets of cols. lines is no. of cols per segment.
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cargs = (self.height << 9) + (self.width << 18) # Viper 4-arg limit
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sc = self.width - 1 # Start and end columns
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ec = sc - lines # End column
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for _ in range(split): # For each segment
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async with elock:
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if self._spi_init: # A callback was passed
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self._spi_init(self._spi) # Bus may be shared
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self._cs(0)
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if cm:
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for col in range(sc, ec, -1): # For each column of landscape display
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_lscopy_gs(lb, buf, col + cargs) # Copy and map colors
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self._spi.write(lb)
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else:
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for col in range(sc, ec, -1): # For each column of landscape display
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_lscopy(lb, buf, clut, col + cargs) # Copy and map colors
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self._spi.write(lb)
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sc -= lines
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ec -= lines
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self._cs(1) # Allow other tasks to use bus
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await asyncio.sleep_ms(0)
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line += lines
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self._cs(1) # Allow other tasks to use bus
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await asyncio.sleep_ms(0)
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