[Micropython Tutorial] Experiment 3 TM1637 digital tube driver

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[Micropython Tutorial] Experiment 3 TM1637 digital tube driver [Copy link]

 First, download the Chinese community mpy driver library address on GitHub:

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Driver library code

1. ''' mpy driver for Four Digit LED Display (TM1637) Author: shaoziyang Date: 2018.3 [url]http://www.micropython.org.cn[/url] ''' from machine import Pin from time import sleep_us TM1637_CMD1 = (64) # 0x40 data command TM1637_CMD2 = (192) # 0xC0 address command TM1637_CMD3 = (128) # 0x80 display control command TM1637_DELAY = (10) # 10us delay between clk/dio pulses _SEGMENTS = (0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71) class TM1637(): def __init__(self, clk, dio, intensity=7, number = 4): self.clk = clk self.dio = dio self._intensity = intensity%8 self._LED = number self._ON = 8 self.dbuf = [0, 0, 0, 0] self.clk.init(Pin.OUT, value=0) self.dio.init(Pin.OUT, value=0) sleep_us(TM1637_DELAY) self.clear() def _start(self): self.dio(0) sleep_us(TM1637_DELAY ) self.clk(0) sleep_us(TM1637_DELAY) def _stop(self): self.dio(0) sleep_us(TM1637_DELAY) self.clk(1) sleep_us(TM1637_DELAY) self.dio(1) def _write_data_cmd(self): # automatic address increment, normal mode self._start() self._write_byte(TM1637_CMD1) self._stop( ) def _write_dsp_ctrl(self): # display on, set brightness self._start() self._write_byte(TM1637_CMD3 | self._ON | self._intensity) self._stop() def _write_byte(self, b): for i in range(8): self.dio((b >> i) & 1) sleep_us(TM1637_DELAY) self.clk(1) sleep_us(TM1637_DELAY) self.clk(0) sleep_us(TM1637_DELAY) self.clk(1) sleep_us(TM1637_DELAY) self.clk(0) sleep_us(TM1637_DELAY) def on(self): self._ON = 8 self._write_data_cmd() self._write_dsp_ctrl() def off(self): self._ON = 0 ._write_data_cmd() self._write_dsp_ctrl() def intensity(self, val=None): if val is None: return self._intensity val = max(0, min(val, 8)) if val == 0: self.off() else: self._ON = 8 self._intensity = val-1 self._write_data_cmd() self._write_dsp_ctrl() def _dat( self, bit, dat): self._write_data_cmd() self._start() self._write_byte(TM1637_CMD2 | (bit%self._LED)) self._write_byte(dat) self._stop() self._write_dsp_ctrl() def clear(self): self._dat(0, 0) self._dat(1, 0) self._dat(2, 0) self._dat(3, 0) self.dbuf = [0, 0, 0, 0] def showbit(self, num, bit = 0): self.dbuf[bit%self._LED] = _SEGMENTS[num%16] self._dat(bit,_SEGMENTS[num%16]) def showDP(self, bit = 1, show = True): bit = bit%self._LED if show: self._dat(bit, self.dbuf[bit] | 0x80) else: self. _dat(bit, self.dbuf[bit] & 0x7F) def shownum(self, num): if num < 0: self._dat(0, 0x40) # '-' num = -num else: self.showbit((num // 1000) % 10) self.showbit(num % 10, 3) self.showbit((num // 10) % 10, 2) self.showbit((num // 100) % 10, 1) def showhex(self, num): if num < 0: self._dat(0, 0x40) # '-' num = -num else: self.showbit((num >> 12) % 16) self.showbit(num % 16, 3) self.showbit((num >> 4) % 16, 2) self.showbit((num >> 8) % 16, 1)

复制代码

Line connection [attach]360911 [/attach] From top to bottom: CLK--clock DIO--data VCC--power positive GND--power negative [attach]360916 [/attach ] The above two TM1637 document links https://wenku.baidu.com/view/b255b268998fcc22bcd10dfc.html https://wenku.baidu.com/view/942f2644647d27284a735117.html[/url ] The following is the test code, which is also the official code. ''' Four Digit Display (TM1637) demo Author: shaoziyang Date: 2018.3 [url]http://www.micropython.org.cn ''' from machine import Pin import time import TM1637 dio = Pin(Pin("Y4"), Pin.OUT) clk = Pin(Pin("Y3"), Pin.OUT) tm=TM1637.TM1637(dio=dio,clk= clk) n = 0 while 1: tm.shownum(n) n += 1 time.sleep_ms(100)[/code] tm.shownum(n)
    n += 1
    time.sleep_ms(100)[/code]

tm.shownum(n)
    n += 1
    time.sleep_ms(100)[/code]