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1 import time
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2 import random
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3 from machine import Pin, PWM, SPI
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4 from ST7735 import TFT, TFTColor
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5 from sysfont import sysfont
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6
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7
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8 class Display:
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9 def __init__(self):
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10 self.lcd_backlight = PWM(Pin(17), freq=20000, duty=1023)
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11 self.backlight_level = 0 # to 100
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12 self.spi = SPI(1,
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13 baudrate=20000000,
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14 polarity=0,
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15 phase=0,
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16 sck=Pin(5),
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17 mosi=Pin(18))
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18 self.tft = TFT(
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19 self.spi,
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20 aDC=19,
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21 aReset=16, # not connected
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22 aCS=21)
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23 self.tft.rotation(2)
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24 self.tft.initr()
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25 self.tft.rgb(True)
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26
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27 self.tft.fill(TFT.BLACK)
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28 # for x in range(0, self.tft.size()[0], 6):
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29 # self.tft.line((0, 0), (x, self.tft.size()[1] - 1),
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30 # TFTColor(random.randrange(0, 256),
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31 # random.randrange(0, 256),
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32 # random.randrange(0, 256)))
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33 def startupText(self, row, msg):
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34 y1 = (row + 1) * 10
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35 self.tft.fillrect((0, y1), (128, 10), TFT.BLACK)
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36 self.tft.text((3, y1), msg, TFT.WHITE, sysfont)
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37
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38 def backlight(self, new, step_sec=0.005):
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39 v = self.backlight_level
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40 while v != new:
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41 v = v + (-1 if v > new else (1 if v < new else 0))
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42 self.lcd_backlight.duty(v * 10)
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43 self.backlight_level = v
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44 time.sleep(step_sec)
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45
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