Raspberry Pi Platform 4-bit common yin digital tube python programming

Beginner Python , try to change the program that was previously written in C on the Raspberry Pi. Python version of the. Four-bit common yin digital tube and Raspberry Pi Circuit connection method is as follows:

A ~ p-------------------------------GPIO0 ~ GPIO7

D1 ~ d4-----------------------------GPIO11 ~gpio8

Here is the photo after the circuit is connected:

After connecting the circuit to write the program, the program code is as follows:

#!/usr/bin/env pythonimport Rpi.gpio as Gpioimport timeBIT0 = 3 BIT1 = 5bit2 = 24bit3 = Segcode = [0x3f,0x06,0x5b,0x4f, 0X66,0X6D,0X7D,0X07,0X7F,0X6F] #0 ~9pins = [11,12,13,15,16,18,22,7,3,5,24,26]bits = [BIT0, BIT1, BIT2, Bit3]def Print_ MSG ():p rint ' program is running ... ' print ' please press CTRL + C end the program ... ' Def Digitalwritebyte (val): Gpio.output ( One, Val & (0x01 << 0)) Gpio.output (Val & (0x01 << 1)) Gpio.output (Val & (0x01 << 2)) GP Io.output (Val & (0x01 << 3)) Gpio.output (+ val & (0x01 << 4)) Gpio.output (Val & (0x01 < < 5) Gpio.output (+, Val & (0x01 << 6)) Gpio.output (7, Val & (0x01 << 7)) def display_1 (): GPIO.OUTPU T (BIT0, GPIO. Low) Fori in range:d igitalwritebyte (Segcode[i]) Time.sleep (0.5) def display_2 (): For bit in bits:GPIO.output (bit, GPIO.  Low) Fori in range:d igitalwritebyte (Segcode[i]) Time.sleep (0.5) def display_3 (num): B0 = num% 10b1 = num% 100/10 b2 = Num% 1000/100b3= Num/1000if num < 10:gpio.output (BIT0, GPIO. Low) Gpio.output (BIT1, GPIO. High) Gpio.output (BIT2, GPIO. High) Gpio.output (BIT3, GPIO. High) Digitalwritebyte (segcode[b0]) elif num >= and num < 100:gpio.output (BIT0, GPIO. Low) Digitalwritebyte (segcode[b0]) time.sleep (0.002) gpio.output (BIT0, GPIO. High) Gpio.output (BIT1, GPIO. Low) Digitalwritebyte (SEGCODE[B1]) time.sleep (0.002) gpio.output (BIT1, GPIO. High) elif num >= and num < 1000:gpio.output (BIT0, GPIO. Low) Digitalwritebyte (segcode[b0]) time.sleep (0.002) gpio.output (BIT0, GPIO. High) Gpio.output (BIT1, GPIO. Low) Digitalwritebyte (SEGCODE[B1]) time.sleep (0.002) gpio.output (BIT1, GPIO. High) Gpio.output (BIT2, GPIO. Low) Digitalwritebyte (SEGCODE[B2]) time.sleep (0.002) gpio.output (BIT2, GPIO. High) elif num >= and num < 10000:gpio.output (BIT0, GPIO. Low) Digitalwritebyte (segcode[b0]) time.sleep (0.002) gpio.output (BIT0, GPIO. High) Gpio.output (BIT1, GPIO. Low) Digitalwritebyte (SEGCODE[B1]) time.sleep (0.002) gpio.output (BIT1, GPIO. High) Gpio.ouTput (BIT2, GPIO. Low) Digitalwritebyte (SEGCODE[B2]) time.sleep (0.002) gpio.output (BIT2, GPIO. High) Gpio.output (BIT3, GPIO. Low) Digitalwritebyte (Segcode[b3]) time.sleep (0.002) gpio.output (BIT3, GPIO. High) Else:print ' out of range, NUM should is 0~9999! ' def setup (): Gpio.setmode (GPIO. BOARD) #Number GPIOs by its physical locationfor pin in Pins:GPIO.setup (PIN, GPIO. Out) #set All pins ' mode is outputgpio.output (PIN, GPIO. High) #set all pins is high level (3.3V) def Loop (): While True:print_msg () display_1 () time.sleep (1) display_2 () time.sleep (1) tmp = Int (raw_input (' please input a num (0~9999): ')] for I in range:d isplay_3 (tmp) Time.sleep (1) def destroy (): #Whe N program ending, the function is executed. For pin in Pins:GPIO.output (PIN, GPIO. Low) #set All pins is low level (0V) Gpio.setup (PIN, GPIO. IN) #set all pins ' mode is input if __name__ = = ' __main__ ': #Program starting from here Setup () Try:loop () except Keybo   Ardinterrupt:destroy ()

Demo video Download Link:Http://yunpan.cn/cASWDrmujvBxEExtraction Code 68E4

Raspberry Pi Platform 4-bit common yin digital tube python programming