kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
Update driver pico_epaper_42.py.
rodzic
40430abbf7
commit
da7188aef6
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@ -94,11 +94,15 @@ EPD_partial_lut_bb1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00"
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# Invert: EPD is black on white
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# 337/141 us for 2000 bytes (125/250MHz)
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@micropython.viper
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def _linv(dest:ptr8, source:ptr8, length:int):
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for n in range(length):
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c = source[n]
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dest[n] = c ^ 0xFF
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def _linv(dest:ptr32, source:ptr32, length:int):
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n: int = length-1
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z: uint32 = int(0xFFFFFFFF)
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while n >= 0:
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dest[n] = source[n] ^ z
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n -= 1
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class EPD(framebuf.FrameBuffer):
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# A monochrome approach should be used for coding this. The rgb method ensures
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@ -122,6 +126,7 @@ class EPD(framebuf.FrameBuffer):
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self.height = _EPD_HEIGHT
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self.buf = bytearray(_EPD_HEIGHT * _BWIDTH)
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self.mvb = memoryview(self.buf)
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self.ibuf = bytearray(1000) # Buffer for inverted pixels
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mode = framebuf.MONO_HLSB
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self.palette = BoolPalette(mode)
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super().__init__(self.buf, _EPD_WIDTH, _EPD_HEIGHT, mode)
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@ -252,44 +257,55 @@ class EPD(framebuf.FrameBuffer):
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return not (self._busy or (self.busy_pin() == 0)) # 0 == busy
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@micropython.native
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def _line(self, start, buf=bytearray(_BWIDTH)): # Sending 50 bytes 40us at 10MHz, 12ms for 300 lines
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_linv(buf, self.mvb[start:], _BWIDTH) # Invert image data for EPD
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def _bsend(self, start, nbytes):
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buf = self.ibuf
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_linv(buf, self.mvb[start:], nbytes >> 2) # Invert image data for EPD
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self.send_bytes(buf)
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# Timing @10MHz/250MHz: full refresh 2.1s, partial 740ms
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# Blocking with split=5 740/5=150ms
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async def _as_show(self, split):
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# Time to convert and transmit 1000 bytes ~ 1ms: most of that is tx @ 10MHz
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# Yield every 16 transfers means blocking is ~16ms
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# Total convert and transmit time for 15000 bytes is ~15ms.
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# Timing @10MHz/250MHz: full refresh 2.1s, partial 740ms: the bulk of the time
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# is spent spinning on the busy pin and is CPU frequency independent.
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async def _as_show(self):
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self.send_command(b"\x13")
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lps = _EPD_HEIGHT // split
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idx = 0
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#ttt = time.ticks_ms()
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for _ in range(split): # For each segment
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for _ in range(lps):
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self._line(idx)
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idx += _BWIDTH
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await asyncio.sleep_ms(0)
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#print("Time", time.ticks_diff(time.ticks_ms(), ttt))
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fbidx = 0 # Index into framebuf
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nbytes = len(self.ibuf) # Bytes to send
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nleft = len(self.buf) # Size of framebuf
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npass = 0
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while nleft > 0:
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self._bsend(fbidx, nbytes) # Invert, buffer and send nbytes
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fbidx += nbytes # Adjust for bytes already sent
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nleft -= nbytes
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nbytes = min(nbytes, nleft)
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if not ((npass := npass + 1) % 16):
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await asyncio.sleep_ms(0) # Control blocking time
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self._updated.set()
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self.send_command(b"\x12") # Nonblocking .display_on()
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while not self.busy_pin():
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await asyncio.sleep_ms(0) # About 1.7s for full refresh
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while not self.busy_pin(): # Wait on display hardware
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await asyncio.sleep_ms(0)
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self._busy = False
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#print("Time", time.ticks_diff(time.ticks_ms(), ttt)) # ~630ms
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async def do_refresh(self, split): # For micro-gui
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assert (not self._busy), "Refresh while busy"
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await self._as_show(split) # split=5
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await self._as_show() # split=5
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def show(self): # nanogui
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if self._busy:
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raise RuntimeError('Cannot refresh: display is busy.')
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self._busy = True # Immediate busy flag. Pin goes low much later.
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if self._asyn:
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asyncio.create_task(self._as_show(5)) # split into 5 segments
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asyncio.create_task(self._as_show())
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return
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self.send_command(b"\x13")
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for j in range(_EPD_HEIGHT):
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self._line(j)
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fbidx = 0 # Index into framebuf
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nbytes = len(self.ibuf) # Bytes to send
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nleft = len(self.buf) # Size of framebuf
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while nleft > 0:
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self._bsend(fbidx, nbytes) # Invert, buffer and send nbytes
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fbidx += nbytes # Adjust for bytes already sent
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nleft -= nbytes
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nbytes = min(nbytes, nleft)
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self._busy = False
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self.display_on()
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self.wait_until_ready()
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