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Fix bring_gpio_interrupt_into_userspace on Debian, #29 #30

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Fix bring_gpio_interrupt_into_userspace on Debian, #29 #30

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11 changes: 10 additions & 1 deletion pifacecommon/interrupts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
import time
import errno
from .core import get_bit_num
from os import listdir,path
import pifacecommon.mcp23s17


Expand All @@ -14,7 +15,15 @@
# IN_EVENT_DIR_OFF = INPUT_DIRECTION_OFF = 1
# IN_EVENT_DIR_BOTH = INPUT_DIRECTION_BOTH = None

GPIO_INTERRUPT_PIN = 25
GPIO_OFFSET = 0
GPIO_OFFSET_CHECK_PATH = '/sys/bus/gpio/devices/gpiochip0/../gpio'
if path.isdir(GPIO_OFFSET_CHECK_PATH):
gpio_device_dir = listdir(GPIO_OFFSET_CHECK_PATH)
if gpio_device_dir and gpio_device_dir[0].startswith('gpiochip'):
gpio_offset_str = gpio_device_dir[0].strip('gpiochip')
if gpio_offset_str.isnumeric():
GPIO_OFFSET = int(gpio_offset_str)
GPIO_INTERRUPT_PIN = GPIO_OFFSET + 25
GPIO_INTERRUPT_DEVICE = "/sys/class/gpio/gpio%d" % GPIO_INTERRUPT_PIN
GPIO_INTERRUPT_DEVICE_EDGE = '%s/edge' % GPIO_INTERRUPT_DEVICE
GPIO_INTERRUPT_DEVICE_VALUE = '%s/value' % GPIO_INTERRUPT_DEVICE
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