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test backlight changes

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janeptrv 2020-11-03 21:08:49 -05:00
parent 78d39b3eaa
commit 16fc4aa682
1 changed files with 7 additions and 3 deletions
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10
leds.py
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@ -53,7 +53,7 @@ class Adafruit_CharLCD:
LCD_5x10DOTS = 0x04 LCD_5x10DOTS = 0x04
LCD_5x8DOTS = 0x00 LCD_5x8DOTS = 0x00
def __init__(self, pin_rs=24, pin_e=23, pins_db=[17, 18, 27, 22], GPIO=None): def __init__(self, pin_rs=24, pin_e=23, pin_b=04, pins_db=[17, 18, 27, 22], GPIO=None):
# Emulate the old behavior of using RPi.GPIO if we haven't been given # Emulate the old behavior of using RPi.GPIO if we haven't been given
# an explicit GPIO interface to use # an explicit GPIO interface to use
if not GPIO: if not GPIO:
@ -61,16 +61,20 @@ class Adafruit_CharLCD:
self.GPIO = GPIO self.GPIO = GPIO
self.pin_rs = pin_rs self.pin_rs = pin_rs
self.pin_e = pin_e self.pin_e = pin_e
self.pin_b = pin_b
self.pins_db = pins_db self.pins_db = pins_db
self.GPIO.setwarnings(False) self.GPIO.setwarnings(False)
self.GPIO.setmode(GPIO.BCM) self.GPIO.setmode(GPIO.BCM)
self.GPIO.setup(self.pin_e, GPIO.OUT) self.GPIO.setup(self.pin_e, GPIO.OUT)
self.GPIO.setup(self.pin_rs, GPIO.OUT) self.GPIO.setup(self.pin_rs, GPIO.OUT)
self.GPIO.setup(self.pin_b, GPIO.OUT)
for pin in self.pins_db: for pin in self.pins_db:
self.GPIO.setup(pin, GPIO.OUT) self.GPIO.setup(pin, GPIO.OUT)
self.GPIO.output(self.pin_b, True)
self.write4bits(0x33) # initialization self.write4bits(0x33) # initialization
self.write4bits(0x32) # initialization self.write4bits(0x32) # initialization
self.write4bits(0x28) # 2 line 5x7 matrix self.write4bits(0x28) # 2 line 5x7 matrix
@ -118,13 +122,13 @@ class Adafruit_CharLCD:
def noDisplay(self): def noDisplay(self):
""" Turn the display off (quickly) """ """ Turn the display off (quickly) """
self.GPIO.output(self.pin_b, False)
self.displaycontrol &= ~self.LCD_DISPLAYON self.displaycontrol &= ~self.LCD_DISPLAYON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def display(self): def display(self):
""" Turn the display on (quickly) """ """ Turn the display on (quickly) """
self.GPIO.output(self.pin_b, True)
self.displaycontrol |= self.LCD_DISPLAYON self.displaycontrol |= self.LCD_DISPLAYON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)