为什么中间的两个行和8 x 8 common阳极LED矩阵根本不打开的中间两行和最左边的列？

Question

我正在尝试使一个LED矩阵显示一个微笑的脸，然后滚动浏览数字0-9和字母AF。但是，当我运行附加的代码时，一切都应该运行，除了中间的两个行和最左边的列时，当您的左侧标签根本没有打开时。这是硬件问题还是其他问题？

我使用的是Raspberry Pi 3b+和两个74HC595 IC，一个控制行，另一个控制列。

谢谢

import RPi.GPIO as GPIO
import time

LSBFIRST = 1
MSBFIRST = 2
# define the pins connect to 74HC595
dataPin   = 11      # DS Pin of 74HC595(Pin14)
latchPin  = 13      # ST_CP Pin of 74HC595(Pin12)
clockPin = 15       # SH_CP Pin of 74HC595(Pin11)
pic = [0x1c,0x22,0x51,0x45,0x45,0x51,0x22,0x1c]  # data of smiling face
data = [     # data of "0-F"
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # " "
    0x00, 0x00, 0x3E, 0x41, 0x41, 0x3E, 0x00, 0x00, # "0"
    0x00, 0x00, 0x21, 0x7F, 0x01, 0x00, 0x00, 0x00, # "1"
    0x00, 0x00, 0x23, 0x45, 0x49, 0x31, 0x00, 0x00, # "2"
    0x00, 0x00, 0x22, 0x49, 0x49, 0x36, 0x00, 0x00, # "3"
    0x00, 0x00, 0x0E, 0x32, 0x7F, 0x02, 0x00, 0x00, # "4"
    0x00, 0x00, 0x79, 0x49, 0x49, 0x46, 0x00, 0x00, # "5"
    0x00, 0x00, 0x3E, 0x49, 0x49, 0x26, 0x00, 0x00, # "6"
    0x00, 0x00, 0x60, 0x47, 0x48, 0x70, 0x00, 0x00, # "7"
    0x00, 0x00, 0x36, 0x49, 0x49, 0x36, 0x00, 0x00, # "8"
    0x00, 0x00, 0x32, 0x49, 0x49, 0x3E, 0x00, 0x00, # "9"
    0x00, 0x00, 0x3F, 0x44, 0x44, 0x3F, 0x00, 0x00, # "A"
    0x00, 0x00, 0x7F, 0x49, 0x49, 0x36, 0x00, 0x00, # "B"
    0x00, 0x00, 0x3E, 0x41, 0x41, 0x22, 0x00, 0x00, # "C"
    0x00, 0x00, 0x7F, 0x41, 0x41, 0x3E, 0x00, 0x00, # "D"
    0x00, 0x00, 0x7F, 0x49, 0x49, 0x41, 0x00, 0x00, # "E"
    0x00, 0x00, 0x7F, 0x48, 0x48, 0x40, 0x00, 0x00, # "F"
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # " "
]
def setup():
    GPIO.setmode(GPIO.BOARD)    # use PHYSICAL GPIO Numbering
    GPIO.setup(dataPin, GPIO.OUT)
    GPIO.setup(latchPin, GPIO.OUT)
    GPIO.setup(clockPin, GPIO.OUT)

def shiftOut(dPin,cPin,order,val):
    for i in range(0,8):
        GPIO.output(cPin,GPIO.LOW);
        if(order == LSBFIRST):
            GPIO.output(dPin,(0x01&(val>>i)==0x01) and GPIO.HIGH or GPIO.LOW)
        elif(order == MSBFIRST):
            GPIO.output(dPin,(0x80&(val<<i)==0x80) and GPIO.HIGH or GPIO.LOW)
        GPIO.output(cPin,GPIO.HIGH);

def loop():
    while True:
        for j in range(0,500): # Repeat enough times to display the smiling face a period of time
            x=0x80
            for i in range(0,8):
                GPIO.output(latchPin,GPIO.LOW)
                shiftOut(dataPin,clockPin,MSBFIRST,pic[i]) #first shift data of line information to first stage 74HC959

                shiftOut(dataPin,clockPin,MSBFIRST,~x) #then shift data of column information to second stage 74HC959
                GPIO.output(latchPin,GPIO.HIGH) # Output data of two stage 74HC595 at the same time
                time.sleep(0.001) # display the next column
                x>>=1
        for k in range(0,len(data)-8): #len(data) total number of "0-F" columns
            for j in range(0,20): # times of repeated displaying LEDMatrix in every frame, the bigger the "j", the longer the display time.
                x=0x80      # Set the column information to start from the first column
                for i in range(k,k+8):
                    GPIO.output(latchPin,GPIO.LOW)
                    shiftOut(dataPin,clockPin,MSBFIRST,data[i])
                    shiftOut(dataPin,clockPin,MSBFIRST,~x)
                    GPIO.output(latchPin,GPIO.HIGH)
                    time.sleep(0.001)
                    x>>=1
def destroy():
    GPIO.cleanup()
if __name__ == '__main__':  # Program entrance
    print ('Program is starting...' )
    setup()
    try:
        loop()
    except KeyboardInterrupt:   # Press ctrl-c to end the program.
        destroy()