analog_to_digital.py

import time

import gremlin

t16000 = gremlin.input_devices.JoystickDecorator(
    "T.16000M",
    72331530,
    "Default"
)

g_current_velocity = 0.0
g_center_deadzone = 0.05
g_button_forward = 1
g_button_backward = 2

g_bin_width = 0.01
g_action_indicator = [False,] * int(1.0 / g_bin_width)


@gremlin.input_devices.periodic(0.01)
def digital_to_analog(vjoy):
    # No motion
    if abs(g_current_velocity) < g_center_deadzone:
        vjoy[1].button(g_button_backward).is_pressed = False
        vjoy[1].button(g_button_forward).is_pressed = False
        return

    # Index into button state mapping
    time_now = time.time()
    index = int(len(g_action_indicator) * (time_now - int(time_now)))

    # Going forward
    if g_current_velocity > 0:
        vjoy[1].button(g_button_backward).is_pressed = False
        vjoy[1].button(g_button_forward).is_pressed = g_action_indicator[index]
    # Going backward
    else:
        vjoy[1].button(g_button_backward).is_pressed = g_action_indicator[index]
        vjoy[1].button(g_button_forward).is_pressed = False
    

@t16000.axis(2)
def throttle_change(event, vjoy):
    global g_current_velocity
    global g_action_indicator

    g_current_velocity = event.value
    # Recompute the flags indicating whether or not to press a button
    for i in range(len(g_action_indicator)):
        if abs(event.value) < (i+1) * g_bin_width:
            g_action_indicator[i] = False
        else:
            g_action_indicator[i] = True