Code:
#include GPIO and Timer Library
import RPi.GPIO as GPIO
import time
class led57_object(object):
def __init__(self):
#define Raspberry Pi GPIO number
self.sleeptime=0.001
self.ROW1=23
self.ROW2=18
self.ROW3=25
self.ROW4=22
self.ROW5=17
self.COL1=7
self.COL2=8
self.COL3=4
self.COL4=24
self.COL5=10
self.COL6=9
self.COL7=11
#Raspberry Pi GPIO initalization
GPIO.setmode( GPIO.BCM )
GPIO.setup(self.COL1, GPIO.OUT)
GPIO.setup(self.COL2, GPIO.OUT)
GPIO.setup(self.COL3, GPIO.OUT)
GPIO.setup(self.COL4, GPIO.OUT)
GPIO.setup(self.COL5, GPIO.OUT)
GPIO.setup(self.COL6, GPIO.OUT)
GPIO.setup(self.COL7, GPIO.OUT)
GPIO.setup(self.ROW1, GPIO.OUT)
GPIO.setup(self.ROW2, GPIO.OUT)
GPIO.setup(self.ROW3, GPIO.OUT)
GPIO.setup(self.ROW4, GPIO.OUT)
GPIO.setup(self.ROW5, GPIO.OUT)
def clear(self):
#set all GPIO output to LOW
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.LOW)
GPIO.output(self.COL3, GPIO.LOW)
GPIO.output(self.COL4, GPIO.LOW)
GPIO.output(self.COL5, GPIO.LOW)
GPIO.output(self.COL6, GPIO.LOW)
GPIO.output(self.COL7, GPIO.LOW)
GPIO.output(self.ROW1, GPIO.LOW)
GPIO.output(self.ROW2, GPIO.LOW)
GPIO.output(self.ROW3, GPIO.LOW)
GPIO.output(self.ROW4, GPIO.LOW)
GPIO.output(self.ROW5, GPIO.LOW)
def demo(self):
#Code sample of showing 'Pi'
while 1:
self.clear()
GPIO.output(self.ROW1, GPIO.HIGH)
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.LOW)
GPIO.output(self.COL3, GPIO.LOW)
GPIO.output(self.COL4, GPIO.HIGH)
GPIO.output(self.COL5, GPIO.HIGH)
GPIO.output(self.COL6, GPIO.LOW)
GPIO.output(self.COL7, GPIO.HIGH)
time.sleep(self.sleeptime)
self.clear()
GPIO.output(self.ROW2, GPIO.HIGH)
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.HIGH)
GPIO.output(self.COL3, GPIO.HIGH)
GPIO.output(self.COL4, GPIO.LOW)
GPIO.output(self.COL5, GPIO.HIGH)
GPIO.output(self.COL6, GPIO.HIGH)
GPIO.output(self.COL7, GPIO.HIGH)
time.sleep(self.sleeptime)
self.clear()
GPIO.output(self.ROW3, GPIO.HIGH)
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.LOW)
GPIO.output(self.COL3, GPIO.LOW)
GPIO.output(self.COL4, GPIO.HIGH)
GPIO.output(self.COL5, GPIO.HIGH)
GPIO.output(self.COL6, GPIO.LOW)
GPIO.output(self.COL7, GPIO.HIGH)
time.sleep(self.sleeptime)
self.clear()
GPIO.output(self.ROW4, GPIO.HIGH)
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.HIGH)
GPIO.output(self.COL3, GPIO.HIGH)
GPIO.output(self.COL4, GPIO.HIGH)
GPIO.output(self.COL5, GPIO.HIGH)
GPIO.output(self.COL6, GPIO.LOW)
GPIO.output(self.COL7, GPIO.HIGH)
time.sleep(self.sleeptime)
self.clear()
GPIO.output(self.ROW5, GPIO.HIGH)
GPIO.output(self.COL1, GPIO.LOW)
GPIO.output(self.COL2, GPIO.HIGH)
GPIO.output(self.COL3, GPIO.HIGH)
GPIO.output(self.COL4, GPIO.HIGH)
GPIO.output(self.COL5, GPIO.HIGH)
GPIO.output(self.COL6, GPIO.LOW)
GPIO.output(self.COL7, GPIO.HIGH)
time.sleep(self.sleeptime)
def main():
ledobj=led57_object()
ledobj.demo()
if __name__ == "__main__":
main()
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