96 lines
2.6 KiB
Python
96 lines
2.6 KiB
Python
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# compatibility layer: emulate an SPI-connected OLED display
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from micropython import const
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import framebuf
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# register definitions
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SET_CONTRAST = const(0x81)
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SET_ENTIRE_ON = const(0xa4)
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SET_NORM_INV = const(0xa6)
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SET_DISP = const(0xae)
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SET_MEM_ADDR = const(0x20)
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SET_COL_ADDR = const(0x21)
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SET_PAGE_ADDR = const(0x22)
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SET_DISP_START_LINE = const(0x40)
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SET_SEG_REMAP = const(0xa0)
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SET_MUX_RATIO = const(0xa8)
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SET_COM_OUT_DIR = const(0xc0)
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SET_DISP_OFFSET = const(0xd3)
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SET_COM_PIN_CFG = const(0xda)
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SET_DISP_CLK_DIV = const(0xd5)
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SET_PRECHARGE = const(0xd9)
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SET_VCOM_DESEL = const(0xdb)
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SET_CHARGE_PUMP = const(0x8d)
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# Subclassing FrameBuffer provides support for graphics primitives
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# http://docs.micropython.org/en/latest/pyboard/library/framebuf.html
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class SSD1306(framebuf.FrameBuffer):
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def __init__(self, width, height, is_mk5):
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self.width = width
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self.height = height
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self.is_mk5 = is_mk5
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self.pages = self.height // 8
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self.buffer = bytearray(self.pages * self.width)
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super().__init__(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
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self.init_display()
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def init_display(self):
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self.fill(0)
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self.show()
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def poweroff(self):
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#self.write_cmd(SET_DISP | 0x00)
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pass
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def poweron(self):
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#self.write_cmd(SET_DISP | 0x01)
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pass
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def contrast(self, contrast):
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#self.write_cmd(SET_CONTRAST)
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#self.write_cmd(contrast)
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pass
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def invert(self, invert):
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#self.write_cmd(SET_NORM_INV | (invert & 1))
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# TODO
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pass
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def show(self):
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x0 = 0
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x1 = self.width - 1
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if self.width == 64:
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# displays with width of 64 pixels are shifted by 32
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x0 += 32
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x1 += 32
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self.write_cmd(SET_COL_ADDR)
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self.write_cmd(x0)
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self.write_cmd(x1)
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self.write_cmd(SET_PAGE_ADDR)
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self.write_cmd(0)
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self.write_cmd(self.pages - 1)
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self.write_data(self.buffer)
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def busy_bar(self, enable, pattern):
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# Render a continuous activity (not progress) bar in lower 8 lines of display
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if enable:
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# just show as static pattern
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t = self.buffer[:-128] + pattern
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self.write_data(t)
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class SSD1306_SPI(SSD1306):
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def __init__(self, width, height, spi, dc, res, cs, is_mk5=False):
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import sys
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self.pipe = open(int(sys.argv[1]), 'wb')
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super().__init__(width, height, is_mk5)
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def write_cmd(self, cmd):
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pass
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def write_data(self, buf):
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self.pipe.write(buf)
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