kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
93 wiersze
3.5 KiB
Python
93 wiersze
3.5 KiB
Python
# SSD1331.py MicroPython driver for Adafruit 0.96" OLED display
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# https://www.adafruit.com/product/684
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# The MIT License (MIT)
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# Copyright (c) 2018 Peter Hinch
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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# Show command
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# 0x15, 0, 0x5f, 0x75, 0, 0x3f Col 0-95 row 0-63
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# Initialisation command
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# 0xae display off (sleep mode)
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# 0xa0, 0x32 256 color RGB, horizontal RAM increment
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# 0xa1, 0x00 Startline row 0
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# 0xa2, 0x00 Vertical offset 0
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# 0xa4 Normal display
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# 0xa8, 0x3f Set multiplex ratio
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# 0xad, 0x8e Ext supply
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# 0xb0, 0x0b Disable power save mode
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# 0xb1, 0x31 Phase period
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# 0xb3, 0xf0 Oscillator frequency
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# 0x8a, 0x64, 0x8b, 0x78, 0x8c, 0x64, # Precharge
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# 0xbb, 0x3a Precharge voltge
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# 0xbe, 0x3e COM deselect level
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# 0x87, 0x06 master current attenuation factor
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# 0x81, 0x91 contrast for all color "A" segment
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# 0x82, 0x50 contrast for all color "B" segment
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# 0x83, 0x7d contrast for all color "C" segment
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# 0xaf Display on
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import framebuf
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import utime
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import gc
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class SSD1331(framebuf.FrameBuffer):
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# Convert r, g, b in range 0-255 to an 8 bit colour value
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# acceptable to hardware: rrrgggbb
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@staticmethod
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def rgb(r, g, b):
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return (r & 0xe0) | ((g >> 3) & 0x1c) | (b >> 6)
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def __init__(self, spi, pincs, pindc, pinrs, height=64, width=96):
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self.spi = spi
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self.rate = 6660000 # Data sheet: 150ns min clock period
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self.pincs = pincs
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self.pindc = pindc # 1 = data 0 = cmd
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self.height = height # Required by Writer class
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self.width = width
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# Save color mode for use by writer_gui (blit)
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self.mode = framebuf.GS8 # Use 8bit greyscale for 8 bit color.
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gc.collect()
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self.buffer = bytearray(self.height * self.width)
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super().__init__(self.buffer, self.width, self.height, self.mode)
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pinrs(0) # Pulse the reset line
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utime.sleep_ms(1)
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pinrs(1)
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utime.sleep_ms(1)
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self._write(b'\xae\xa0\x32\xa1\x00\xa2\x00\xa4\xa8\x3f\xad\x8e\xb0'\
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b'\x0b\xb1\x31\xb3\xf0\x8a\x64\x8b\x78\x8c\x64\xbb\x3a\xbe\x3e\x87'\
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b'\x06\x81\x91\x82\x50\x83\x7d\xaf', 0)
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gc.collect()
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self.show()
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def _write(self, buf, dc):
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self.spi.init(baudrate=self.rate, polarity=1, phase=1)
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self.pincs(1)
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self.pindc(dc)
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self.pincs(0)
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self.spi.write(buf)
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self.pincs(1)
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def show(self, _cmd=b'\x15\x00\x5f\x75\x00\x3f'): # Pre-allocate
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self._write(_cmd, 0)
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self._write(self.buffer, 1)
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