Legal Removal Request

Post: Hi Andrew, Thank you very much for your help. Just want to share my findings. First, just want to mentioned that I use interrupt mirror to detect both interrupts IA & IB with one GPIO pin. I don't think it's related to the issue. Per your guidance, I rearanged the code a bit and implemented the inProcess flag in the button_pressed to stop more than one instance of button_pressed from running; or more specifically to prevent accessing the IO Pi at the same time as the first instance, causing an I2C bus conflict. That solved the problem partially but it still occurred when I pressed the button at a very high frequency. From trial and error, I found that the problem was not reproducable when I set the [b]sleep time[/b] in the button_pressed function for "simulating biz logic" to 3 secs or larger. Or looping for 10 secs to simulate work load. Without the looping and sleep of 1 sec, the locking still occurred. I am wondering if I should try python lock. I should be able to live with the current approach since my biz logic will be long running and greater than 5 secs. Thanks, Gabe [pre][code]def button_pressed(pin_interrupt): global bus, inProcess if inProcess: return else: inProcess = True unsubscribe_interrupt_event() intval_p0 = bus.read_interrupt_capture(0) intval_p1 = bus.read_interrupt_capture(1) intval_status_p0 = bus.read_interrupt_status(0) intval_status_p1 = bus.read_interrupt_status(1) p0_read = bus.read_port(0) p1_read = bus.read_port(1) while (intval_p0 == p0_read and intval_p1 == p1_read): print("sleep to wait for changes in port value...") time.sleep(0.2) p0_read = bus.read_port(0) p1_read = bus.read_port(1) # do biz logic by simulating with sleep & loop i = 1 while i<5000: time.sleep(0.002) i = i+1 time.sleep(5) subscribe_interrupt_event() inProcess = False print("ready and waiting for next button push...") def unsubscribe_interrupt_event(): GPIO.remove_event_detect(PIN_INTERRUPT) bus.set_interrupt_on_port(0, 0x00) bus.set_interrupt_on_port(1, 0x00) bus.reset_interrupts() def subscribe_interrupt_event(): bus.set_interrupt_defaults(0, INTERRUPT_DEFAULT) bus.set_interrupt_defaults(1, INTERRUPT_DEFAULT) bus.set_interrupt_on_port(0, 0x01) bus.set_interrupt_on_port(1, 0x01) bus.reset_interrupts() GPIO.add_event_detect(12, GPIO.FALLING, callback=button_pressed)[/code][/pre]