TM1637 LED Display ansteuern - Only 4 PIN Red Common Anode 4-Segment Digital Tube Display For Arduino Raspberry

Anschlußschema am BananaPiPro

TM1637 Board Pin	Funktion	RPi PIN	RPi Funktion
GND	Ground	39	GND
VCC	+3,3V Power	1	3,3V
DIO	Data In	38	GPIO 20
CLK	Clock	40	GPIO 21

• Python Scripte:
  • downloaden:

wget https://raspberrytips.nl/files/tm1637.py
wget https://raspberrytips.nl/files/47digitclock.py

• 4747digitclock.py für obige Schaltung anpassen:

• GPIO 23 auf GPIO 20 (RPi-Pin 16 auf 38)
• GPIO 24 auf GPIO 21 (RPi-Pin 18 auf 40)

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# https://raspberrytips.nl/tm1637-4-digit-led-display-raspberry-pi/

import sys
import time
import datetime
import RPi.GPIO as GPIO
import tm1637

#CLK -> GPIO20 (Pin 38)
#DI0 -> GPIO21 (Pin 40)

Display = tm1637.TM1637(20,21,tm1637.BRIGHT_TYPICAL)

Display.Clear()
Display.SetBrightnes(1)

while(True):
   now = datetime.datetime.now()
   hour = now.hour
   minute = now.minute
   second = now.second
   currenttime = [ int(hour / 10), hour % 10, int(minute / 10), minute % 10 ]

   Display.Show(currenttime)
   Display.ShowDoublepoint(second % 2)

   time.sleep(1)

• ausführbar machen:

chmod +x *.py

• automatsich beim Booten starten:

sudo crontab -e

• Zeile einfügen:

@reboot /root/47digitclock.py &

• tm1637.py

# https://raspberrytips.nl/tm1637-4-digit-led-display-raspberry-pi/

import sys
import os
import time
import RPi.GPIO as IO

IO.setwarnings(False)
IO.setmode(IO.BCM)

HexDigits = [0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71]

ADDR_AUTO = 0x40
ADDR_FIXED = 0x44
STARTADDR = 0xC0
BRIGHT_DARKEST = 0
BRIGHT_TYPICAL = 2
BRIGHT_HIGHEST = 7
OUTPUT = IO.OUT
INPUT = IO.IN
LOW = IO.LOW
HIGH = IO.HIGH

class TM1637:
	__doublePoint = False
	__Clkpin = 0
	__Datapin = 0
	__brightnes = BRIGHT_TYPICAL;
	__currentData = [0,0,0,0];

	def __init__( self, pinClock, pinData, brightnes ):
		self.__Clkpin = pinClock
		self.__Datapin = pinData
		self.__brightnes = brightnes;
		IO.setup(self.__Clkpin,OUTPUT)
		IO.setup(self.__Datapin,OUTPUT)
	# end  __init__

	def Clear(self):
		b = self.__brightnes;
		point = self.__doublePoint;
		self.__brightnes = 0;
		self.__doublePoint = False;
		data = [0x7F,0x7F,0x7F,0x7F];
		self.Show(data);
		self.__brightnes = b;				# restore saved brightnes
		self.__doublePoint = point;
	# end  Clear

	def ShowInt(self, i):
		s = str(i)
		self.Clear()
		for i in range(0,len(s)):
			self.Show1(i, int(s[i]))

	def Show( self, data ):
		for i in range(0,4):
			self.__currentData[i] = data[i];

		self.start();
		self.writeByte(ADDR_AUTO);
		self.stop();
		self.start();
		self.writeByte(STARTADDR);
		for i in range(0,4):
			self.writeByte(self.coding(data[i]));
		self.stop();
		self.start();
		self.writeByte(0x88 + self.__brightnes);
		self.stop();
	# end  Show

	def SetBrightnes(self, brightnes):		# brightnes 0...7
		if( brightnes > 7 ):
			brightnes = 7;
		elif( brightnes < 0 ):
			brightnes = 0;

		if( self.__brightnes != brightnes):
			self.__brightnes = brightnes;
			self.Show(self.__currentData);
		# end if
	# end  SetBrightnes

	def ShowDoublepoint(self, on):			# shows or hides the doublepoint
		if( self.__doublePoint != on):
			self.__doublePoint = on;
			self.Show(self.__currentData);
		# end if
	# end  ShowDoublepoint

	def writeByte( self, data ):
		for i in range(0,8):
			IO.output( self.__Clkpin, LOW)
			if(data & 0x01):
				IO.output( self.__Datapin, HIGH)
			else:
				IO.output( self.__Datapin, LOW)
			data = data >> 1
			IO.output( self.__Clkpin, HIGH)
		#endfor

		# wait for ACK
		IO.output( self.__Clkpin, LOW)
		IO.output( self.__Datapin, HIGH)
		IO.output( self.__Clkpin, HIGH)
		IO.setup(self.__Datapin, INPUT)

		while(IO.input(self.__Datapin)):
			time.sleep(0.001)
			if( IO.input(self.__Datapin)):
				IO.setup(self.__Datapin, OUTPUT)
				IO.output( self.__Datapin, LOW)
				IO.setup(self.__Datapin, INPUT)
			#endif
		# endwhile
		IO.setup(self.__Datapin, OUTPUT)
	# end writeByte

	def start(self):
		IO.output( self.__Clkpin, HIGH) # send start signal to TM1637
		IO.output( self.__Datapin, HIGH)
		IO.output( self.__Datapin, LOW)
		IO.output( self.__Clkpin, LOW)
	# end start

	def stop(self):
		IO.output( self.__Clkpin, LOW)
		IO.output( self.__Datapin, LOW)
		IO.output( self.__Clkpin, HIGH)
		IO.output( self.__Datapin, HIGH)
	# end stop

	def coding(self, data):
		if( self.__doublePoint ):
			pointData = 0x80
		else:
			pointData = 0;

		if(data == 0x7F):
			data = 0
		else:
			data = HexDigits[data] + pointData;
		return data
	# end coding

# end class TM1637

Quelle: Quelle 2: