122 lines
2.5 KiB
Python
122 lines
2.5 KiB
Python
"""
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TM1637 for Four Digit LED Display
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Micropython library for the TM1637
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=======================================================
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@dahanzimin From the Mixly Team
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"""
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from machine import Pin
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from time import sleep_us
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from micropython import const
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TM1637_CMD1 = const(0x40)
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TM1637_CMD2 = const(0xC0)
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TM1637_CMD3 = const(0x80)
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TM1637_DSP_ON = const(0x08)
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TM1637_DELAY = const(0x0A)
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_SEGMENTS = b'\x3F\x06\x5B\x4F\x66\x6D\x7D\x07\x7F\x6F\x77\x7C\x39\x5E\x79\x71'
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class TM1637:
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def __init__(self, clk, dio, brightness=2):
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self.clk = Pin(clk, Pin.OUT, value=0)
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self.dio = Pin(dio, Pin.OUT, value=0)
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sleep_us(TM1637_DELAY)
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self._intensity = brightness
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self.dbuf = [0, 0, 0, 0]
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self.on()
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def _start(self):
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self.dio(0)
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sleep_us(TM1637_DELAY)
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self.clk(0)
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sleep_us(TM1637_DELAY)
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def _stop(self):
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self.dio(0)
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sleep_us(TM1637_DELAY)
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self.clk(1)
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sleep_us(TM1637_DELAY)
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self.dio(1)
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def _write(self, b):
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for i in range(8):
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self.dio((b >> i) & 1)
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sleep_us(TM1637_DELAY)
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self.clk(1)
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sleep_us(TM1637_DELAY)
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self.clk(0)
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sleep_us(TM1637_DELAY)
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self.clk(0)
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sleep_us(TM1637_DELAY)
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self.clk(1)
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sleep_us(TM1637_DELAY)
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self.clk(0)
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sleep_us(TM1637_DELAY)
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def intensity(self, val=None):
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"""Set the display brightness 0-7."""
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if val is None:
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return self._intensity
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val = max(min(val, 7), 0)
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self._intensity = val
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if val == 0:
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self.off()
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else:
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self.on()
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def on(self):
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self._start()
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self._write(TM1637_CMD1)
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self._stop()
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self._start()
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self._write(TM1637_CMD3 | TM1637_DSP_ON | self._intensity)
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self._stop()
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def off(self):
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self._start()
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self._write(TM1637_CMD3)
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self._stop()
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def dat(self, bit, data):
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self._start()
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self._write(TM1637_CMD2 | bit)
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self._write(data)
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self._stop()
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def clear(self):
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self.dat(0, 0)
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self.dat(1, 0)
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self.dat(2, 0)
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self.dat(3, 0)
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self.dbuf = [0, 0, 0, 0]
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def showbit(self, num, bit=0):
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self.dbuf[bit % 4] = _SEGMENTS[num % 16]
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self.dat(bit, _SEGMENTS[num % 16])
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def shownum(self, num):
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if num < 0:
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self.dat(0, 0x40) # '-'
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num = -num
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else:
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self.showbit((num // 1000) % 10)
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self.showbit(num % 10, 3)
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self.showbit((num // 10) % 10, 2)
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self.showbit((num // 100) % 10, 1)
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def showhex(self, num):
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if num < 0:
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self.dat(0, 0x40) # '-'
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num = -num
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else:
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self.showbit((num >> 12) % 16)
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self.showbit(num % 16, 3)
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self.showbit((num >> 4) % 16, 2)
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self.showbit((num >> 8) % 16, 1)
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def showDP(self, bit=1, show=True):
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if show:
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self.dat(bit, self.dbuf[bit] | 0x80)
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else:
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self.dat(bit, self.dbuf[bit] & 0x7F)
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