96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
"""
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ST7789/FrameBuffer
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MicroPython library for the ST7789(TFT-SPI)
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=======================================================
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@dahanzimin From the Mixly Team
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"""
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import time
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import uframebuf
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from machine import Pin
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from camera import Image, IMG
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class ST7789(uframebuf.FrameBuffer_Uincode):
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def __init__(self, spi, width, height, dc_pin=None, backlight=None, reset=None, font_address=0x700000):
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self.spi = spi
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self.dc = Pin(dc_pin, Pin.OUT, value=1)
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self._buffer = bytearray(width * height * 2)
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super().__init__(self._buffer, width, height, uframebuf.RGB565)
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if reset: reset(1, 100)
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self.font(font_address)
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self._init()
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# self.show()
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self._oneclight = True
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self._backlight = backlight
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def display(self, data=None, x=None, y=None, scale_width=None, scale_height=None, rotation=0, sync=True):
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if type(data) is str:
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data = Image.open(data, scale_width, scale_height, self.width, self.height, rotation=rotation)
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if sync: self.fill(0x0, sync=False)
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self.blit_rgb565(data.image, data.width, data.height, x, y)
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if sync: self.show()
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def screenshot(self, x=0, y=0, w=None, h=None):
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if (w is None and h is None):
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return IMG(memoryview(self._buffer), self.width, self.height)
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else:
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return IMG(memoryview(self.crop_rgb565(x,y,w,h)), w, h)
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def _write(self, cmd, dat=None):
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self.dc.off()
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self.spi.write(bytearray([cmd]))
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if dat is not None:
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self.dc.on()
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self.spi.write(dat)
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def _init(self):
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"""Display initialization configuration"""
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for cmd, data, delay in [
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(0x11, None, 120000),
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(0x36, b'\x00', 50),
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(0x3A, b'\x05', 50),
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(0xB2, b'\x1F\x1F\x00\x33\x33', 10),
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(0xB7, b'\x00', 10),
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(0xBB, b'\x36', 10),
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(0xC0, b'\x2C', 10),
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(0xC2, b'\x01', 10),
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(0xC3, b'\x13', 10),
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(0xC4, b'\x20', 10),
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(0xC6, b'\x13', 10),
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(0xD0, b'\xA4\xA1', 10),
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(0xD6, b'\xA1', 10),
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(0xE0, b'\xF0\x08\x0E\x09\x08\x04\x2F\x33\x45\x36\x13\x12\x2A\x2D', 10),
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(0xE1, b'\xF0\x0E\x12\x0C\x0A\x15\x2E\x32\x44\x39\x17\x18\x2B\x2F', 10),
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(0xE4, b'\x1D\x00\x00', 10),
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(0x21, None, 10),
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(0x29, None, 10),
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]:
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self._write(cmd, data)
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if delay:
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time.sleep_us(delay)
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def get_brightness(self):
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return self._backlight() / 100
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def set_brightness(self, brightness):
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if not 0.0 <= brightness <= 1.0:
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raise ValueError(
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"Brightness must be a decimal number in the range: 0.0~1.0")
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self._backlight(int(brightness * 100))
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def color(self, red, green=None, blue=None):
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""" Convert red, green and blue values (0-255) into a 16-bit 565 encoding."""
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if green is None or blue is None:
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return red
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else:
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return (red & 0xf8) << 8 | (green & 0xfc) << 3 | blue >> 3
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def show(self):
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"""Refresh the display and show the changes."""
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if self._oneclight:
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self.set_brightness(0.6)
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self._oneclight = False
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self._write(0x2A, b'\x00\x00\x00\xef')
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self._write(0x2B, b'\x00\x00\x00\xef')
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self._write(0x2C, self._buffer)
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