def del_interrupt_callback(self, gpio_id):
""" Delete all interrupt callbacks from a certain gpio """
debug("- removing interrupts on gpio %s" % gpio_id)
gpio_id = _GPIO.channel_to_gpio(gpio_id)
fileno = self._map_gpioid_to_fileno[gpio_id]
# 1. Remove from epoll
self._epoll.unregister(fileno)
# 2. Cache the file
f = self._map_fileno_to_file[fileno]
# 3. Remove from maps
del self._map_fileno_to_file[fileno]
del self._map_fileno_to_gpioid[fileno]
del self._map_fileno_to_options[fileno]
del self._map_gpioid_to_fileno[gpio_id]
del self._map_gpioid_to_callbacks[gpio_id]
# 4. Close file last in case of IOError
f.close()
def del_interrupt_callback(self, gpio_id):
""" Delete all interrupt callbacks from a certain gpio """
debug("- removing interrupts on gpio %s" % gpio_id)
gpio_id = _GPIO.channel_to_gpio(gpio_id)
fileno = self._map_gpioid_to_fileno[gpio_id]
# 1. Remove from epoll
self._epoll.unregister(fileno)
# 2. Cache the file
f = self._map_fileno_to_file[fileno]
# 3. Remove from maps
del self._map_fileno_to_file[fileno]
del self._map_fileno_to_gpioid[fileno]
del self._map_fileno_to_options[fileno]
del self._map_gpioid_to_fileno[gpio_id]
del self._map_gpioid_to_callbacks[gpio_id]
# 4. Close file last in case of IOError
f.close()
def add_interrupt_callback(self, gpio_id, callback, edge='both',
pull_up_down=_GPIO.PUD_OFF, threaded_callback=False,
debounce_timeout_ms=None):
"""
Add a callback to be executed when the value on 'gpio_id' changes to
the edge specified via the 'edge' parameter (default='both').
`pull_up_down` can be set to `RPIO.PUD_UP`, `RPIO.PUD_DOWN`, and
`RPIO.PUD_OFF`.
If `threaded_callback` is True, the callback will be started
inside a Thread.
"""
gpio_id = _GPIO.channel_to_gpio(gpio_id)
debug("Adding callback for GPIO %s" % gpio_id)
if not edge in ["falling", "rising", "both", "none"]:
raise AttributeError("'%s' is not a valid edge." % edge)
if not pull_up_down in [_GPIO.PUD_UP, _GPIO.PUD_DOWN, _GPIO.PUD_OFF]:
raise AttributeError("'%s' is not a valid pull_up_down." % edge)
# Make sure the gpio_id is valid
if not gpio_id in (RPIO.GPIO_LIST_R1 if _GPIO.RPI_REVISION == 1 else \
RPIO.GPIO_LIST_R2):
raise AttributeError("GPIO %s is not a valid gpio-id." % gpio_id)
# Require INPUT pin setup; and set the correct PULL_UPDN
if RPIO.gpio_function(int(gpio_id)) == RPIO.IN:
RPIO.set_pullupdn(gpio_id, pull_up_down)
else:
debug("- changing gpio function from %s to INPUT" % \
(GPIO_FUNCTIONS[RPIO.gpio_function(int(gpio_id))]))
RPIO.setup(gpio_id, RPIO.IN, pull_up_down)
# Prepare the callback (wrap in Thread if needed)
cb = callback if not threaded_callback else \
partial(_threaded_callback, callback)
# Prepare the /sys/class path of this gpio
path_gpio = "%sgpio%s/" % (_SYS_GPIO_ROOT, gpio_id)
# If initial callback for this GPIO then set everything up. Else make
# sure the edge detection is the same.
if gpio_id in self._map_gpioid_to_callbacks:
with open(path_gpio + "edge", "r") as f:
e = f.read().strip()
if e != edge:
raise AttributeError(("Cannot add callback for gpio %s:"
" edge detection '%s' not compatible with existing"
" edge detection '%s'.") % (gpio_id, edge, e))
# Check whether edge is the same, else throw Exception
debug("- kernel interface already setup for GPIO %s" % gpio_id)
self._map_gpioid_to_callbacks[gpio_id].append(cb)
else:
# If kernel interface already exists unexport first for clean setup
if os.path.exists(path_gpio):
if self._show_warnings:
warn("Kernel interface for GPIO %s already exists." % \
gpio_id)
debug("- unexporting kernel interface for GPIO %s" % gpio_id)
with open(_SYS_GPIO_ROOT + "unexport", "w") as f:
f.write("%s" % gpio_id)
time.sleep(0.1)
# Export kernel interface /sys/class/gpio/gpioN
with open(_SYS_GPIO_ROOT + "export", "w") as f:
f.write("%s" % gpio_id)
self._gpio_kernel_interfaces_created.append(gpio_id)
debug("- kernel interface exported for GPIO %s" % gpio_id)
# Configure gpio as input
with open(path_gpio + "direction", "w") as f:
f.write("in")
# Configure gpio edge detection
with open(path_gpio + "edge", "w") as f:
f.write(edge)
debug(("- kernel interface configured for GPIO %s "
"(edge='%s', pullupdn=%s)") % (gpio_id, edge, \
_PULL_UPDN[pull_up_down]))
# Open the gpio value stream and read the initial value
f = open(path_gpio + "value", 'r')
val_initial = f.read().strip()
debug("- inital gpio value: %s" % val_initial)
f.seek(0)
# Add callback info to the mapping dictionaries
self._map_fileno_to_file[f.fileno()] = f
self._map_fileno_to_gpioid[f.fileno()] = gpio_id
self._map_fileno_to_options[f.fileno()] = {
"debounce_timeout_s": debounce_timeout_ms / 1000.0 if \
debounce_timeout_ms else 0,
"interrupt_last": 0,
"edge": edge
}
self._map_gpioid_to_fileno[gpio_id] = f.fileno()
self._map_gpioid_to_callbacks[gpio_id] = [cb]
# Add to epoll
self._epoll.register(f.fileno(), select.EPOLLPRI | select.EPOLLERR)
def add_interrupt_callback(self,
gpio_id,
callback,
edge='both',
pull_up_down=_GPIO.PUD_OFF,
threaded_callback=False,
debounce_timeout_ms=None):
"""
Add a callback to be executed when the value on 'gpio_id' changes to
the edge specified via the 'edge' parameter (default='both').
`pull_up_down` can be set to `RPIO.PUD_UP`, `RPIO.PUD_DOWN`, and
`RPIO.PUD_OFF`.
If `threaded_callback` is True, the callback will be started
inside a Thread.
"""
gpio_id = _GPIO.channel_to_gpio(gpio_id)
debug("Adding callback for GPIO %s" % gpio_id)
if not edge in ["falling", "rising", "both", "none"]:
raise AttributeError("'%s' is not a valid edge." % edge)
if not pull_up_down in [_GPIO.PUD_UP, _GPIO.PUD_DOWN, _GPIO.PUD_OFF]:
raise AttributeError("'%s' is not a valid pull_up_down." % edge)
# Make sure the gpio_id is valid
if not gpio_id in (RPIO.GPIO_LIST_R1 if _GPIO.RPI_REVISION == 1 else \
RPIO.GPIO_LIST_R2):
raise AttributeError("GPIO %s is not a valid gpio-id." % gpio_id)
# Require INPUT pin setup; and set the correct PULL_UPDN
if RPIO.gpio_function(int(gpio_id)) == RPIO.IN:
RPIO.set_pullupdn(gpio_id, pull_up_down)
else:
debug("- changing gpio function from %s to INPUT" % \
(GPIO_FUNCTIONS[RPIO.gpio_function(int(gpio_id))]))
RPIO.setup(gpio_id, RPIO.IN, pull_up_down)
# Prepare the callback (wrap in Thread if needed)
cb = callback if not threaded_callback else \
partial(_threaded_callback, callback)
# Prepare the /sys/class path of this gpio
path_gpio = "%sgpio%s/" % (_SYS_GPIO_ROOT, gpio_id)
# If initial callback for this GPIO then set everything up. Else make
# sure the edge detection is the same.
if gpio_id in self._map_gpioid_to_callbacks:
with open(path_gpio + "edge", "r") as f:
e = f.read().strip()
if e != edge:
raise AttributeError(
("Cannot add callback for gpio %s:"
" edge detection '%s' not compatible with existing"
" edge detection '%s'.") % (gpio_id, edge, e))
# Check whether edge is the same, else throw Exception
debug("- kernel interface already setup for GPIO %s" % gpio_id)
self._map_gpioid_to_callbacks[gpio_id].append(cb)
else:
# If kernel interface already exists unexport first for clean setup
if os.path.exists(path_gpio):
if self._show_warnings:
warn("Kernel interface for GPIO %s already exists." % \
gpio_id)
debug("- unexporting kernel interface for GPIO %s" % gpio_id)
with open(_SYS_GPIO_ROOT + "unexport", "w") as f:
f.write("%s" % gpio_id)
time.sleep(0.1)
# Export kernel interface /sys/class/gpio/gpioN
with open(_SYS_GPIO_ROOT + "export", "w") as f:
f.write("%s" % gpio_id)
self._gpio_kernel_interfaces_created.append(gpio_id)
debug("- kernel interface exported for GPIO %s" % gpio_id)
# Configure gpio as input
with open(path_gpio + "direction", "w") as f:
f.write("in")
# Configure gpio edge detection
with open(path_gpio + "edge", "w") as f:
f.write(edge)
debug(("- kernel interface configured for GPIO %s "
"(edge='%s', pullupdn=%s)") % (gpio_id, edge, \
_PULL_UPDN[pull_up_down]))
# Open the gpio value stream and read the initial value
f = open(path_gpio + "value", 'r')
val_initial = f.read().strip()
debug("- inital gpio value: %s" % val_initial)
f.seek(0)
# Add callback info to the mapping dictionaries
self._map_fileno_to_file[f.fileno()] = f
self._map_fileno_to_gpioid[f.fileno()] = gpio_id
self._map_fileno_to_options[f.fileno()] = {
"debounce_timeout_s": debounce_timeout_ms / 1000.0 if \
debounce_timeout_ms else 0,
"interrupt_last": 0,
"edge": edge
}
self._map_gpioid_to_fileno[gpio_id] = f.fileno()
self._map_gpioid_to_callbacks[gpio_id] = [cb]
# Add to epoll
self._epoll.register(f.fileno(), select.EPOLLPRI | select.EPOLLERR)
