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pin CS to AD7843

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This commit is contained in:
Bartosz Kościów 2017-05-16 17:57:55 +02:00
parent 3d9102916b
commit 7d568251e9
1 changed files with 9 additions and 1 deletions
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10
gfxlcd/driver/ad7843/ad7843.py
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@ -4,7 +4,7 @@ import RPi.GPIO
class AD7843(object): class AD7843(object):
"""AD7843 class""" """AD7843 class"""
def __init__(self, width, height, int_pin=None, callback=None, spi=0, speed=2000000): def __init__(self, width, height, int_pin=None, callback=None, cs_pin=None, spi=0, speed=2000000):
self.width = width self.width = width
self.height = height self.height = height
self.spi = spidev.SpiDev() self.spi = spidev.SpiDev()
@ -17,6 +17,7 @@ class AD7843(object):
'ratio_x': 14.35, 'ratio_x': 14.35,
'ratio_y': 10.59 'ratio_y': 10.59
} }
self.cs_pin = cs_pin
self.int_pin = int_pin self.int_pin = int_pin
self.callback = callback self.callback = callback
self.bouncetime = 500 self.bouncetime = 500
@ -28,6 +29,9 @@ class AD7843(object):
RPi.GPIO.add_event_detect( RPi.GPIO.add_event_detect(
self.int_pin, RPi.GPIO.BOTH, callback=self._interrupt, bouncetime=self.bouncetime self.int_pin, RPi.GPIO.BOTH, callback=self._interrupt, bouncetime=self.bouncetime
) )
if self.cs_pin:
RPi.GPIO.setup(self.cs_pin, RPi.GPIO.OUT)
RPi.GPIO.output(self.cs_pin, 1)
def get_x(self, value): def get_x(self, value):
"""correct value to x""" """correct value to x"""
@ -39,7 +43,11 @@ class AD7843(object):
def _interrupt(self, channel): def _interrupt(self, channel):
"""call users callback""" """call users callback"""
if self.cs_pin:
RPi.GPIO.output(self.cs_pin, 0)
self.callback(self.get_position()) self.callback(self.get_position())
if self.cs_pin:
RPi.GPIO.output(self.cs_pin, 1)
def get_position(self): def get_position(self):
"""get touch coords""" """get touch coords"""