python script for 4x4 keypad, some buttons not workin - python-3.x

Question

I'm trying to use a python script to make a connection with my 4x4 keypad on Rastberry (RPi.GPIO).
The code does not work correctly, because the first and second rows does not respond. I'm trying to use pad4pi, but in my case, this not work.
This is the code I'm using in the moment.
(Main Control)
import RPi.GPIO as GPIO
import time
import serial
import Keypad
#import Open_CV
ROWS = 4 # number of rows of the Keypad
COLS = 4 #number of columns of the Keypad
keys = [ '1','2','3','A', #key code
'4','5','6','B',
'7','8','9','C',
'*','0','#','D' ]
rowsPins = [18,22,29,31] #connect to the row pinouts of the keypad
colsPins = [32,33,36,37] #connect to the column pinouts of the keypad
# the pins need to be these, because the others are already in use
# Configure the use of the serial terminal and the baud rate
ser = serial.Serial( #"/dev/ttyS0", 9600)
port='/dev/ttyS0', #Replace ttyS0 with ttyAM0 for Pi1,Pi2,Pi0
baudrate = 9600,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS,
timeout=1)
#Configuração inicial dos terminais GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
# call the video method
#video("teste.mp4")
def loop():
keypad = Keypad.Keypad(keys,rowsPins,colsPins,ROWS,COLS) #create Keypad object
keypad.setDebounceTime(50) #set the debounce time
# call the video method
#video('/home/pi/share/teste.mp4')
while(True):
key = keypad.getKey() #obtain the state of keys
if(key != keypad.NULL): #if there is key pressed, print its key code.
print ("You Pressed Key : %c "%(key))
ser.write(str.encode(key))
time.sleep(1)
#ret, frame = cap.read()
#gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#cv2.imshow('frame',gray)
#if cv2.waitKey(1) & 0xFF == ord('q'):
# break
#cap.release()
#cv2.destroyAllWindows()
if __name__ == '__main__': #Program start from here
print ("Program is starting ... ")
try:
loop()
except KeyboardInterrupt: #When 'Ctrl+C' is pressed, exit the program.
GPIO.cleanup()
(keypad functions)
#!/usr/bin/env python3
########################################################################
# Filename : Keypad.py
# Description : The module of matrix keypad
# Author : freenove
# modification: 2016/07/13
########################################################################
import RPi.GPIO as GPIO
import time
#class Key:Define some of the properties of Key
class Key(object):
NO_KEY = '\0'
#Defines the four states of Key
IDLE = 0
PRESSED = 1
HOLD = 2
RELEASED = 3
#define OPEN and CLOSED
OPEN = 0
CLOSED =1
#constructor
def __init__(self):
self.kchar = self.NO_KEY
self.kstate = self.IDLE
self.kcode = -1
self.stateChanged = False
class Keypad(object):
NULL = '\0'
LIST_MAX = 10 #Max number of keys on the active list.
MAPSIZE = 10 #MAPSIZE is the number of rows (times 16 columns)
bitMap = [0]*MAPSIZE
key = [Key()]*LIST_MAX
holdTime = 500 #key hold time
holdTimer = 0
startTime = 0
#Allows custom keymap, pin configuration, and keypad sizes.
def __init__(self,usrKeyMap,row_Pins,col_Pins,num_Rows,num_Cols):
GPIO.setmode(GPIO.BOARD)
self.rowPins = row_Pins
self.colPins = col_Pins
self.numRows = num_Rows
self.numCols = num_Cols
self.keymap = usrKeyMap
self.setDebounceTime(10)
#Returns a single key only. Retained for backwards compatibility.
def getKey(self):
single_key = True
if(self.getKeys() and self.key[0].stateChanged and (self.key[0].kstate == self.key[0].PRESSED)):
return self.key[0].kchar
single_key = False
return self.key[0].NO_KEY
#Populate the key list.
def getKeys(self):
keyActivity = False
#Limit how often the keypad is scanned.
if((time.time() - self.startTime) > self.debounceTime*0.001):
self.scanKeys()
keyActivity = self.updateList()
self.startTime = time.time()
return keyActivity
#Hardware scan ,the result store in bitMap
def scanKeys(self):
#Re-intialize the row pins. Allows sharing these pins with other hardware.
for pin_r in self.rowPins:
GPIO.setup(pin_r,GPIO.IN,pull_up_down = GPIO.PUD_UP)
#bitMap stores ALL the keys that are being pressed.
for pin_c in self.colPins:
GPIO.setup(pin_c,GPIO.OUT)
GPIO.output(pin_c,GPIO.LOW)
for r in self.rowPins: #keypress is active low so invert to high.
self.bitMap[self.rowPins.index(r)] = self.bitWrite(self.bitMap[self.rowPins.index(r)],self.colPins.index(pin_c),not GPIO.input(r))
#Set pin to high impedance input. Effectively ends column pulse.
GPIO.output(pin_c,GPIO.HIGH)
GPIO.setup(pin_c,GPIO.IN)
#Manage the list without rearranging the keys. Returns true if any keys on the list changed state.
def updateList(self):
anyActivity = False
kk = Key()
#Delete any IDLE keys
for i in range(self.LIST_MAX):
if(self.key[i].kstate == kk.IDLE):
self.key[i].kchar = kk.NO_KEY
self.key[i].kcode = -1
self.key[i].stateChanged = False
# Add new keys to empty slots in the key list.
for r in range(self.numRows):
for c in range(self.numCols):
button = self.bitRead(self.bitMap[r],c)
keyChar = self.keymap[r * self.numCols +c]
keyCode = r * self.numCols +c
idx = self.findInList(keyCode)
#Key is already on the list so set its next state.
if(idx > -1):
self.nextKeyState(idx,button)
#Key is NOT on the list so add it.
if((idx == -1) and button):
for i in range(self.LIST_MAX):
if(self.key[i].kchar == kk.NO_KEY): #Find an empty slot or don't add key to list.
self.key[i].kchar = keyChar
self.key[i].kcode = keyCode
self.key[i].kstate = kk.IDLE #Keys NOT on the list have an initial state of IDLE.
self.nextKeyState(i,button)
break #Don't fill all the empty slots with the same key.
#Report if the user changed the state of any key.
for i in range(self.LIST_MAX):
if(self.key[i].stateChanged):
anyActivity = True
return anyActivity
#This function is a state machine but is also used for debouncing the keys.
def nextKeyState(self,idx, button):
self.key[idx].stateChanged = False
kk = Key()
if(self.key[idx].kstate == kk.IDLE):
if(button == kk.CLOSED):
self.transitionTo(idx,kk.PRESSED)
self.holdTimer = time.time() #Get ready for next HOLD state.
elif(self.key[idx].kstate == kk.PRESSED):
if((time.time() - self.holdTimer) > self.holdTime*0.001): #Waiting for a key HOLD...
self.transitionTo(idx,kk.HOLD)
elif(button == kk.OPEN): # or for a key to be RELEASED.
self.transitionTo(idx,kk.RELEASED)
elif(self.key[idx].kstate == kk.HOLD):
if(button == kk.OPEN):
self.transitionTo(idx,kk.RELEASED)
elif(self.key[idx].kstate == kk.RELEASED):
self.transitionTo(idx,kk.IDLE)
def transitionTo(self,idx,nextState):
self.key[idx].kstate = nextState
self.key[idx].stateChanged = True
#Search by code for a key in the list of active keys.
#Returns -1 if not found or the index into the list of active keys.
def findInList(self,keyCode):
for i in range(self.LIST_MAX):
if(self.key[i].kcode == keyCode):
return i
return -1
#set Debounce Time, The defaul29t is 50ms
def setDebounceTime(self,ms):
self.debounceTime = ms
#set HoldTime,The default is 500ms
def setHoldTime(self,ms):
self.holdTime = ms
#
def isPressed(self, keyChar):
for i in range(self.LIST_MAX):
if(self.key[i].kchar == keyChar):
if(self.key[i].kstate == self.self.key[i].PRESSED and self.key[i].stateChanged):
return True
return False
#
def waitForKey(self):
kk = Key()
waitKey = kk.NO_KEY
while(waitKey == kk.NO_KEY):
waitKey = self.getKey()
return waitKey
def getState(self):
return self.key[0].kstate
#
def keyStateChanged(self):
return self.key[0].stateChanged
def bitWrite(self,x,n,b):
if(b):
x |= (1<<n)
else:
x &=(~(1<<n))
return x
def bitRead(self,x,n):
if((x>>n)&1 == 1):
return True
else:
return False