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save previously detected pin state for buttons to avoid multiple fires

This commit is contained in:
ohsqueezy 2023-01-13 20:27:32 -05:00
parent b522a23db7
commit 7fb1131c2e
1 changed files with 26 additions and 9 deletions
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35
electric_sieve/ElectricSieve.py
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@ -60,6 +60,12 @@ class ElectricSieve(Game):
"int": ["gradient", "height", "x-step"],
"float": ["altitude-ratio", "spacing-factor", "velocity-ratio", "fade-speed"]
}})
# Member dict for tracking pin state changes. Start at 1 because high means unpressed.
self.pin_states = {
self.PIN_BUTTON_LEFT: 1,
self.PIN_BUTTON_RIGHT: 1
}
# Rotate the display if requested on the command line or in the configuration
if self.check_command_line("-rotate"):
@ -117,18 +123,29 @@ class ElectricSieve(Game):
def gpio_input(self, pin):
"""
Translate GPIO input into PGFW commands, so Raspberry Pi wired controllers be used for input. The pin will be checked for a low
signal, meaning the pin has been connected to ground, which is translated to a button press. If the low signal is not detected, it
is translated to a button release. Usually called as a callback by `GPIO.add_event_detect` but can be called directly.
Translate GPIO input into PGFW commands, so Raspberry Pi wired controllers be used for input.
Compare the pin state to what is stored in memory. Only fire an event if there has been a change in state. A change
from high to low triggers a press event. A change from low to high triggers a press cancel event.
@param pin Raspberry Pi pin number as read by the RPi.GPIO library
"""
cancel = not (GPIO.input(pin) == GPIO.LOW)
if pin == ElectricSieve.PIN_BUTTON_LEFT:
self.input.post_command("left", cancel=cancel)
elif pin == ElectricSieve.PIN_BUTTON_RIGHT:
self.input.post_command("right", cancel=cancel)
self.input.post_any_command(id=pin, cancel=cancel)
if "--debug" in sys.argv:
pin_name = "left" if pin == ElectricSieve.PIN_BUTTON_LEFT else "right"
left_pin_state = GPIO.input(ElectricSieve.PIN_BUTTON_LEFT)
right_pin_state = GPIO.input(ElectricSieve.PIN_BUTTON_RIGHT)
print(f"Received {pin} ({pin_name}) input. Left state is {left_pin_state}. Right state is {right_pin_state}")
# If the saved state of the pin is the same, there hasn't been a real button press or release, so don't continue
if self.pin_states[pin] != GPIO.input(pin):
self.pin_states[pin] = GPIO.input(pin)
# A high signal means the button is released, and a low signal means it is pressed
cancel = not (GPIO.input(pin) == GPIO.LOW)
if pin == ElectricSieve.PIN_BUTTON_LEFT:
self.input.post_command("left", cancel=cancel)
elif pin == ElectricSieve.PIN_BUTTON_RIGHT:
self.input.post_command("right", cancel=cancel)
self.input.post_any_command(id=pin, cancel=cancel)
def orient(self, geometry):
"""