Raspberry Pi 3B+ TM1637 Digital Tube Clock

Operating the TM1637 four-digit digital tube on Raspberry Pi – Only Learning for a Long Time https://blog.whwtf.com/index.php/2022011324.html General Technology Raspberry Pi Display Time https://testerhome.com/topics/12130

Raspberry Pi 3B+ TM1637 4-digit digital tube Raspberry Pi GPIO T-type expansion version connection wire Dupont wire (new) Raspberry Pi 4B system image and WIFI remote configuration information link: https://pan.baidu.com/s/1Jan7v6DuHxY6VmYcLNfTHQ Extraction code: tmsr

# Check kernel version $ uname -a Linux raspberrypi 6.1.21-v7+ #1642 SMP Mon Apr  3 17:20:52 BST 2023 armv7l GNU/Linux $ hostnamectl   Static hostname: raspberrypi         Icon name: computer        Machine ID: 9f23c440839a43c6940e8a22518fc258           Boot ID: 791efb43849248e8b73d79ebd3ccf4ae  Operating System: Raspbian GNU/Linux 11 (bullseye)            Kernel: Linux 6.1.21-v7+      Architecture: arm

The CLK clock pin helps to keep the clock pulse synchronized with the module and the microcontroller. The DIO data pin helps to send and receive data from the microcontroller. GND ground (GND) is used to establish a common ground with external devices. VCC power (VCC) input pin, used to power the module. Accepts 3.3-5V VCC. DIO (serial data) and CLK (clock control)

# main.py import tm1637 import RPi.GPIO as GPIO import time CLK = 23 DIO  = 24 GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) lastTime = None HHMMFORMAT = '%H:%M' digital1637 = tm1637.TM1637(CLK,DIO,tm1637.BRIGHT_TYPICAL) digital1637.showDoublePoint(1) while(True):    timenow = time.strftime('%Y-%m-%d %H:%M',time.localtime(time.time()))    curTime = time.strftime(HHMMFORMAT, time.localtime(time.time()))    if curTime != lastTime:        timer = time.localtime()        number = [timer.tm_hour//10, timer.tm_hour%10, timer.tm_min//10, timer.tm_min%10]        digital1637.showData(number)        lastTime = curTime        print("lastTime >>>", lastTime)    time.sleep(0.1) GPIO.cleanup()

# tm1637py import time import RPi.GPIO as GPIO # 0, 1, 2, 3, 4, 5, 6, 7, 8 ,9 #HexDigits = [0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71]; HexDigits = [0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f] ADDR_AUTO = 0x40 ADDR_FIXED = 0x44 START_ADDR = 0xC0 BRIGHT_DARKEST = 0 BRIGHT_TYPICAL = 2 BRIGHT_HIGHEST = 7 OUTPUT = GPIO.OUT INPUT = GPIO.IN LOW = GPIO.LOW HIGH = GPIO.HIGH class TM1637:    doublePoint = False    clkPin = 0    dataPin = 0    brightnes = BRIGHT_TYPICAL    curData = [0, 0, 0, 0]    def __init__(self, clkPin, dataPin, brightnes=BRIGHT_TYPICAL):        self.clkPin = clkPin        self.dataPin = dataPin        self.brightnes = brightnes        GPIO.setup(self.clkPin, OUTPUT)        GPIO.setup(self.dataPin, OUTPUT)    # end __init__    def clear(self):        point = self.doublePoint        self.doublePoint = False        data = [0, 0, 0, 0]        self.showData(data)        self.doublePoint = point    # end clear    def showData(self, data):        #print 'show data';        for i in range(0, 4):            self.curData[i] = data[i]            #print 'data[', i, ']', data[i];        #end for        self.start()        self.writeByte(ADDR_AUTO)        self.stop()        self.start()        self.writeByte(START_ADDR)        for i in range(0, 4):            self.writeByte(self.encode(data[i]))        self.stop()        self.start()        self.writeByte(0x88 + self.brightnes)        self.stop()    # end showData    def showDoublePoint(self, on):        if(self.doublePoint != on):            self.doublePoint = on            self.showData(self.curData)        # end if    #end showDoublePoint    def writeByte(self, data):        for i in range(0, 8):            GPIO.output(self.clkPin, LOW)            if(data & 0x01):                GPIO.output(self.dataPin, HIGH)            else:                GPIO.output(self.dataPin, LOW)            data = data >> 1            GPIO.output(self.clkPin, HIGH)        # end for        # wait for ACK        GPIO.output(self.clkPin, LOW)        # set data gpio high, until slave ack, set low        GPIO.output(self.dataPin, HIGH)        GPIO.output(self.clkPin, HIGH)        GPIO.setup(self.dataPin, INPUT)  # set data gpio to input for slave        #print 'self.dataPint = ', self.dataPin;        while(GPIO.input(self.dataPin)):            time.sleep(0.001)            if(GPIO.input(self.dataPin)):                GPIO.setup(self.dataPin, OUTPUT)                GPIO.output(self.dataPin, LOW)                GPIO.setup(self.dataPin, INPUT)            # end if        # end while        #print 'ack is get'        GPIO.setup(self.dataPin, OUTPUT)    # end writeByte    def start(self):        GPIO.output(self.clkPin, HIGH)        GPIO.output(self.dataPin, HIGH)        GPIO.output(self.dataPin, LOW)        GPIO.output(self.clkPin, LOW)    # end start    def stop(self):        GPIO.output(self.clkPin, LOW)        GPIO.output(self.dataPin, LOW)        GPIO.output(self.clkPin, HIGH)        GPIO.output(self.dataPin, HIGH)    # end stop    def encode(self, data):        if(self.doublePoint):            pointData = 0x80        else:            pointData = 0        if(data == 0x7F):            data = 0        else:            data = HexDigits[data] + pointData        return data    # end encode # end class TM1637