import time
import RPi.GPIO as GPIO
import os
# Zuordnung der GPIO Pins (ggf. anpassen)
DISPLAY_RS = 7
DISPLAY_E = 8
DISPLAY_DATA4 = 25
DISPLAY_DATA5 = 24
DISPLAY_DATA6 = 23
DISPLAY_DATA7 = 18
DISPLAY_WIDTH = 16 # Zeichen je Zeile
DISPLAY_LINE_1 = 0x80 # Adresse der ersten Display Zeile
DISPLAY_LINE_2 = 0xC0 # Adresse der zweiten Display Zeile
DISPLAY_CHR = True
DISPLAY_CMD = False
E_PULSE = 0.00005
E_DELAY = 0.00005
def get_cpu_temp():
tempFile = open("/sys/class/thermal/thermal_zone0/temp")
cpu_temp = tempFile.read()
tempFile.close()
return float(cpu_temp)/1000
def main():
GPIO.setmode(GPIO.BCM)
GPIO.setup(DISPLAY_E, GPIO.OUT)
GPIO.setup(DISPLAY_RS, GPIO.OUT)
GPIO.setup(DISPLAY_DATA4, GPIO.OUT)
GPIO.setup(DISPLAY_DATA5, GPIO.OUT)
GPIO.setup(DISPLAY_DATA6, GPIO.OUT)
GPIO.setup(DISPLAY_DATA7, GPIO.OUT)
display_init()
lcd_byte(DISPLAY_LINE_1, DISPLAY_CMD)
lcd_string("CPU Temp: " + str(round(get_cpu_temp(), 2)))
GPIO.cleanup()
def display_init():
lcd_byte(0x33,DISPLAY_CMD)
lcd_byte(0x32,DISPLAY_CMD)
lcd_byte(0x28,DISPLAY_CMD)
lcd_byte(0x0C,DISPLAY_CMD)
lcd_byte(0x06,DISPLAY_CMD)
lcd_byte(0x01,DISPLAY_CMD)
def lcd_string(message):
message = message.ljust(DISPLAY_WIDTH," ")
for i in range(DISPLAY_WIDTH):
lcd_byte(ord(message[i]),DISPLAY_CHR)
def lcd_byte(bits, mode):
GPIO.output(DISPLAY_RS, mode)
GPIO.output(DISPLAY_DATA4, False)
GPIO.output(DISPLAY_DATA5, False)
GPIO.output(DISPLAY_DATA6, False)
GPIO.output(DISPLAY_DATA7, False)
if bits&0x10==0x10:
GPIO.output(DISPLAY_DATA4, True)
if bits&0x20==0x20:
GPIO.output(DISPLAY_DATA5, True)
if bits&0x40==0x40:
GPIO.output(DISPLAY_DATA6, True)
if bits&0x80==0x80:
GPIO.output(DISPLAY_DATA7, True)
time.sleep(E_DELAY)
GPIO.output(DISPLAY_E, True)
time.sleep(E_PULSE)
GPIO.output(DISPLAY_E, False)
time.sleep(E_DELAY)
GPIO.output(DISPLAY_DATA4, False)
GPIO.output(DISPLAY_DATA5, False)
GPIO.output(DISPLAY_DATA6, False)
GPIO.output(DISPLAY_DATA7, False)
if bits&0x01==0x01:
GPIO.output(DISPLAY_DATA4, True)
if bits&0x02==0x02:
GPIO.output(DISPLAY_DATA5, True)
if bits&0x04==0x04:
GPIO.output(DISPLAY_DATA6, True)
if bits&0x08==0x08:
GPIO.output(DISPLAY_DATA7, True)
time.sleep(E_DELAY)
GPIO.output(DISPLAY_E, True)
time.sleep(E_PULSE)
GPIO.output(DISPLAY_E, False)
time.sleep(E_DELAY)
if __name__ == '__main__':
main()
