SunFounder Da Vinci Kit Bedienungsanleitung Seite 204

SunFounder Da Vinci Kit
i, row
for
GPIO.output(row, GPIO.HIGH)
for j, col
index
if
GPIO.output(row, GPIO.LOW)
return pressed_keys
setup():
def
global keypad, last_key_pressed
rowsPins = [18,23,24,25]
colsPins = [10,22,27,17]
keys = ["1","2","3","A",
"4","5","6","B",
"7","8","9","C",
" * ","0","#","D"]
keypad = Keypad(rowsPins, colsPins, keys)
last_key_pressed
def loop():
global keypad, last_key_pressed
pressed_keys =
if len(pressed_keys)
print(pressed_keys)
last_key_pressed
time.sleep(0.1)
# Define a destroy function for clean up everything after the script finished
def destroy():
# Release resource
GPIO.cleanup()
if __name__ == '__main__':
try:
setup()
while True:
loop()
except KeyboardInterrupt:
will be executed.
destroy()
Code Erklärung
def setup():
global keypad, last_key_pressed
rowsPins = [18,23,24,25]
colsPins = [10,22,27,17]
keys = ["1","2","3","A",
"4","5","6","B",
"7","8","9","C",
" * ","0","#","D"]
keypad = Keypad(rowsPins, colsPins, keys)
last_key_pressed
Deklarieren Sie jede Taste der Matrixtastatur zu den Array- keys[] und definieren Sie die Pins für jede Zeile und Spalte.
200
enumerate(self.rowsPins):
in
in enumerate(self.colsPins):
= i len(self.colsPins)
*
(GPIO.input(col) ==
pressed_keys.append(self.keys[index])
= []
keypad.read()
!= 0 and last_key_pressed
= pressed_keys
# Program start from here
# When 'Ctrl+C' is pressed, the program destroy()
= []
+ j
1):
!= pressed_keys:
(Fortsetzung der vorherigen Seite)
Kapitel 1. Über das Da Vinci Kit