77 lines
No EOL
1.5 KiB
Python
77 lines
No EOL
1.5 KiB
Python
import time
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from Adafruit_EPD import mcp_sram
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import digitalio
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import busio
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from board import *
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class Adafruit_EPD(object):
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"""Base class for EPD displays
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"""
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BLACK = 0
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WHITE = 1
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INVERSE = 2
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RED = 3
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DARK = 4
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LIGHT = 5
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def __init__(self, width, height, rst, dc, busy, srcs, cs,
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spi):
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self.width = width
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self.height = height
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# Setup reset pin.
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self._rst = rst
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self._rst.direction = digitalio.Direction.OUTPUT
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# Setup busy pin.
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self._busy = busy
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self._busy.direction = digitalio.Direction.INPUT
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# Setup dc pin.
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self._dc = dc
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self._dc.direction = digitalio.Direction.OUTPUT
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# Setup cs pin.
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self._cs = cs
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self._cs.direction = digitalio.Direction.OUTPUT
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self.spi_device = spi
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self.sram = mcp_sram.Adafruit_MCP_SRAM(srcs, spi)
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def begin(self, reset=True):
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self._cs.value = True
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self._dc.value = False
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if reset:
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self._rst.value = False
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time.sleep(.1)
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self._rst.value = True
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time.sleep(.1)
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def command(self, c, data=None, end=True):
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"""Send command byte to display."""
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self._cs.value = True
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self._dc.value = False
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self._cs.value = False
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outbuf = bytearray(1)
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while not self.spi_device.try_lock():
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pass
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self.spi_device.write_readinto(bytearray([c]), outbuf)
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if data is not None:
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self.data(data)
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elif end:
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self._cs.value = True
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self.spi_device.unlock()
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return outbuf[0]
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def data(self, d):
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"""Send data to display."""
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self._dc.value = True
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self.spi_device.write(d)
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self._cs.value = True
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self.spi_device.unlock() |