from labjack import ljm
from time import sleep


def configure_ef_dio(dio_name):
    ljm.eWriteName(labjack_handler, dio_name + "_EF_ENABLE", 0)
    ljm.eWriteName(labjack_handler, "DIO_EF_CLOCK0_DIVISOR", 0)
    ljm.eWriteName(labjack_handler, "DIO_EF_CLOCK0_ROLL_VALUE", 0)
    ljm.eWriteName(labjack_handler, "DIO_EF_CLOCK0_ENABLE", 1)


def enable_ef_dio(dio_name):
    ljm.eWriteName(labjack_handler, dio_name + "_EF_ENABLE", 1)


def disable_ef_dio(dio_name):
    ljm.eWriteName(labjack_handler, dio_name + "_EF_ENABLE", 0)


def configure_dio_pwm_duty(dio_name):
        disable_ef_dio(dio_name)
        ljm.eWriteName(labjack_handler, dio_name + "_EF_OPTIONS", 0)
        ljm.eWriteName(labjack_handler, dio_name + "_EF_CONFIG_A", 0)
        ljm.eWriteName(labjack_handler, dio_name + "_EF_INDEX", 5)
        enable_ef_dio(dio_name)

# This function returns PWM duty and frequency
def get_dio_pwm(self, dio_name):
    ljm.eReadName(self.labjack_handler, dio_name + "_EF_READ_A_AND_RESET")
	# Here i wait 10 ms but also tried 100 ms
    sleep(0.01)
    high_state_ticks = ljm.eReadName(self.labjack_handler, dio_name + "_EF_READ_A")
    low_state_ticks = ljm.eReadName(self.labjack_handler, dio_name + "_EF_READ_B")
    try:
        period = 1.0/(high_state_ticks + low_state_ticks)
    except ZeroDivisionError:
        duty = 100.0 * ljm.eReadName(self.labjack_handler, dio_name)
        return duty, float("inf")
    duty = 100.0*high_state_ticks*period
    freq = 80*10**6*period
    return duty, freq

		

labjack_handler = ljm.openS("T7", "ANY", "ANY")
configure_ef_dio("DIO0")
configure_dio_pwm_duty("DIO")


# This is only mock function used to replace my real function which adjust PWM signal
def set_device_signal():
    pass

while True:
    # Here i set my device signal so it adjust PWM output
    set_device_signal()
    # Than i want to read duty and frequency on same pin as tuple
    print get_dio_pwm("DIO0")