class MyMotor(object):
def __init__(self, motor, speed=0):
self._motor = LargeMotor(motor)
assert self._motor.connected
self._motor.reset()
self._motor.position = 0
self._motor.stop_action = 'brake'
self._set_speed(speed)
@property
def speed(self):
return int(self._speed/10)
def _set_speed(self, speed):
assert speed >= -100 and speed <= 100
self._speed = speed*10
def run_forever(self, speed):
if speed is not None:
self._set_speed(speed)
self._motor.run_forever(speed_sp=self._speed)
def run_timed(self, timed, speed):
if speed is not None:
self._set_speed(speed)
runtimed = timed * 1000
self._motor.run_timed(speed_sp=self._speed, time_sp=runtimed)
def run_position(self, postion, speed, lastpostion=False):
if speed is not None:
self._set_speed(speed)
if lastpostion:
self._motor.run_to_abs_pos(speed_sp=self._speed)
else:
self._motor.run_to_rel_pos(speed_sp=self._speed)
def stop(self):
self._motor.stop()
def run_back(self, speed):
if not self._speed:
self.stop()
self._set_speed(speed)
self._motor.run_forever(speed_sp=self._speed)
OUTPUT_A, Sound, PowerSupply
from time import time, sleep
from math import pi, copysign
N = 1000
file_name = "data_pc.txt"
Kp = 20
pwr = 0
motor = LargeMotor(OUTPUT_A)
battary = PowerSupply()
Sound().beep()
fout = open(file_name, "w")
sleep(0.05)
motor.reset()
print(motor.position)
start_time = time()
for i in range(0, N):
t = time() - start_time
rotation = motor.position
e = (360 - rotation) * pi / 180
pwr = Kp * e
pwr = pwr / battary.measured_volts * 100
if abs(pwr) > 100:
pwr = copysign(1, pwr) * 100
motor.run_direct(duty_cycle_sp=pwr)
line = "%f\t%d\n" % (t, rotation)
fout.write(line)
fout.close()
#!/usr/bin/python from ev3dev.ev3 import MediumMotor as MediumMotor from ev3dev.ev3 import LargeMotor as LargeMotor from time import sleep a = MediumMotor(address='outA') b = LargeMotor(address='outB') c = LargeMotor(address='outC') a.reset() b.reset() c.reset() a.position_sp = 50 a.duty_cycle_sp = 50 a.command = 'run-to-abs-pos' b.position_sp = -450 b.duty_cycle_sp = 50 b.command = 'run-to-abs-pos' c.position_sp = -450 b.duty_cycle_sp = 50 b.command = 'run-to-abs-pos' sleep(5)
#!/usr/bin/python
from ev3dev.ev3 import LargeMotor as LargeMotor
from ev3dev.ev3 import TouchSensor as TouchSensor
from time import sleep
power = -100
run_time = 3
motor_b = LargeMotor(address='outB')
motor_c = LargeMotor(address='outC')
motor_b.reset()
motor_c.reset()
motor_b.command = 'run-direct'
motor_c.command = 'run-direct'
trigger = TouchSensor()
print("Fire when ready!")
while True:
if trigger.value() == True:
break
else:
sleep(.01)
motor_b.duty_cycle_sp = power
motor_c.duty_cycle_sp = power
#!/usr/bin/python
from ev3dev.ev3 import LargeMotor as LargeMotor
from ev3dev.ev3 import TouchSensor as TouchSensor
from time import sleep
power = -100
run_time = 3
motor_b = LargeMotor(address='outB')
motor_c = LargeMotor(address='outC')
motor_b.reset()
motor_c.reset()
motor_b.command = 'run-direct'
motor_c.command = 'run-direct'
trigger = TouchSensor()
print("Fire when ready!")
while True:
if trigger.value() == True:
break
else:
sleep(.01)
class LegoCar:
# Parameters of the car
HARD_MAX_PHI = 0.61
SOFT_MAX_PHI = 0.3
R = 0.0432 / 2 # wheel radius
L = 0.165 # wheelbase
def __init__(self,
init_pose,
soc=None,
port_motor_rear=OUTPUT_A,
port_motor_steer=OUTPUT_B,
port_sensor_gyro='in1'):
# initialization of devices
self.__button_halt = Button()
self.__motor_rear = LargeMotor(port_motor_rear)
self.__motor_steer = LargeMotor(port_motor_steer)
self.__sensor_gyro = GyroSensor(port_sensor_gyro)
self.__velocity_controller = VelocityController(self,
0,
0,
adaptation=False)
self.s = soc
# NOTE: possible using other controllers. Change only here!
self.__trajectory_controller = ControllerWithLinearization()
self.__path_controller = PathController()
self.__localization = Localization(self, init_pose)
self.__robot_state = [0, 0, 0, 0, 0, 0] # x,y, dx,dy, theta,omega
self.reset()
Sound.speak('Ready').wait()
def reset(self):
# reset encoders of motors
self.__motor_rear.reset()
self.__motor_steer.reset()
# reset gyro sensor. The robot needs to be perfectly still!
self.__sensor_gyro.mode = self.__sensor_gyro.modes[1]
self.__sensor_gyro.mode = self.__sensor_gyro.modes[0]
def getDevice(self, what):
if what in ['MOTORS']:
return self.__motor_rear, self.__motor_steer
elif what in ['GYRO']:
return self.__sensor_gyro
def getState(self):
return self.__robot_state
def turnWheel(self, phi_desired):
""" Turns front wheels on the desired angle 'phi_desired' """
pid_phi = PID(100.0, 500.0, 5.0, 100, -100)
t = 0
clock = Clock()
while t < 1: # FIXME: seems that need steady state condition
t, dt = clock.getTandDT()
phi_current = self.__motor_steer.position
error_phi = radians(phi_desired - phi_current)
u_phi = pid_phi.getControl(error_phi, dt)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
Sound.speak('Wheels were turned!')
def velocity_move(self, vel_linear, vel_angular, time):
# initialization for current mode
self.__velocity_controller.setTargetVelocities(vel_linear, vel_angular)
clock = Clock()
fh = open("vel.txt", "w")
while clock.getCurrentTime() <= time:
try:
t, dt = clock.getTandDT()
theta, omega = [-x for x in self.__sensor_gyro.rate_and_angle
] # returns ANGLE AND RATE
x, y, dx, dy, v_r = self.__localization.getData(
radians(theta), radians(self.__motor_rear.speed), dt)
self.__robot_state = [x, y, dx, dy, theta,
omega] # update state
u_v, u_phi = self.__velocity_controller.getControls(
radians(self.__motor_rear.speed),
radians(self.__motor_steer.position), radians(omega), dt)
fh.write("%f %f %f \n" % (t, v_r, radians(omega)))
self.__motor_rear.run_direct(duty_cycle_sp=u_v)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
if self.__button_halt.enter:
break
except KeyboardInterrupt:
break
# off motors
fh.close()
self.__motor_rear.duty_cycle_sp = 0
self.__motor_steer.duty_cycle_sp = 0
# raise SystemExit
def trajectory_move(self, trajectory):
clock = Clock()
fh = open("test.txt", "w")
while not trajectory.is_end:
try:
t, dt = clock.getTandDT()
theta, omega = [-x for x in self.__sensor_gyro.rate_and_angle
] # !!! returns ANGLE AND RATE :)
x, y, dx, dy, v_r, beta = self.__localization.getData(
radians(theta), radians(self.__motor_rear.speed), dt)
self.__robot_state = [x, y, dx, dy, theta,
omega] # update state
point = trajectory.getCoordinatesTime(t)
v_des, omega_des = self.__trajectory_controller.getControls(
point, x, y, dx, dy, beta, dt)
self.__velocity_controller.setTargetVelocities(
v_des, omega_des)
u_v, u_phi = self.__velocity_controller.getControls(
radians(self.__motor_rear.speed),
radians(self.__motor_steer.position), radians(omega), dt)
fh.write(
"%f %f %f %f %f %f %f %f %f %f %f\n" %
(t, x, y, point.x, point.y, v_r, v_des, theta,
radians(omega), omega_des, self.__motor_steer.position))
self.__motor_rear.run_direct(duty_cycle_sp=u_v)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
#print(trajectory.is_end)
if self.__button_halt.enter:
break
except KeyboardInterrupt:
break
# off motors
fh.close()
self.__motor_rear.duty_cycle_sp = 0
self.__motor_steer.duty_cycle_sp = 0
# raise SystemExit
def path_move(self, trajectory, v_des=0.2):
fh = open("test.txt", "w")
clock = Clock()
while not trajectory.is_end:
try:
t, dt = clock.getTandDT()
theta, omega = [-x for x in self.__sensor_gyro.rate_and_angle
] # !!! returns ANGLE AND RATE :)
x, y, dx, dy, v_r = self.__localization.getData(
radians(theta), radians(self.__motor_rear.speed), dt)
self.__robot_state = [x, y, dx, dy, theta,
omega] # update state
x_ref, y_ref, kappa, t_hat = trajectory.getCoordinatesDistance(
x, y)
omega_des = self.__path_controller.getControls(
v_r, x, y, x_ref, y_ref, radians(theta), kappa, t_hat)
self.__velocity_controller.setTargetVelocities(
v_des, omega_des)
u_v, u_phi = self.__velocity_controller.getControls(
radians(self.__motor_rear.speed),
radians(self.__motor_steer.position), radians(omega), dt)
fh.write("%f %f %f %f %f\n" % (t, x, y, x_ref, y_ref))
self.__motor_rear.run_direct(duty_cycle_sp=u_v)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
if self.__button_halt.enter:
break
except KeyboardInterrupt:
break
# off motors
self.__motor_rear.duty_cycle_sp = 0
self.__motor_steer.duty_cycle_sp = 0
class LegoCar:
# Parameters of the car
HARD_MAX_PHI = 0.61
SOFT_MAX_PHI = 0.3
R = 0.0432 / 2 # wheel radius
L = 0.21 - R # wheelbase
D = 0.112 # distance between the axes of rotation of the front wheels
# Ultrasonic Sensors positions respect of the middle of the rear axle
US_FRONT = (L, 0.06)
US_REAR = (-0.015, 0.06)
def __init__(self,
port_motor_rear=OUTPUT_A,
port_motor_steer=OUTPUT_B,
port_sensor_gyro='in1',
port_sensor_us_front='in2',
port_sensor_us_rear='in3'):
# initialization of devices
self.__button_halt = Button()
self.__motor_rear = LargeMotor(port_motor_rear)
self.__motor_steer = LargeMotor(port_motor_steer)
self.__sensor_gyro = GyroSensor(port_sensor_gyro)
self.__sensor_us_rear = UltrasonicSensor(port_sensor_us_rear)
self.__sensor_us_front = UltrasonicSensor(port_sensor_us_front)
self.__velocity_controller = VelocityController(self, 0, 0)
# NOTE: possible using other controllers. Change only here!
self.__trajectory_controller = ControllerWithLinearization()
self.__localization = Localization(self)
self.__robot_state = [0, 0, 0, 0, 0, 0] # x,y, dx,dy, theta,omega
self.reset()
Sound.speak('Initialization complete!').wait()
def reset(self):
# reset encoders of motors
self.__motor_rear.reset()
self.__motor_steer.reset()
# reset gyro sensor. The robot needs to be perfectly still!
self.__sensor_gyro.mode = self.__sensor_gyro.modes[1]
self.__sensor_gyro.mode = self.__sensor_gyro.modes[0]
def getDevice(self, what):
if what in ['US_SENSORS']:
return self.__sensor_us_front, self.__sensor_us_rear
elif what in ['MOTORS']:
return self.__motor_rear, self.__motor_steer
elif what in ['GYRO']:
return self.__sensor_gyro
def getState(self):
return self.__robot_state
def turnWheel(self, phi_desired):
""" Turned front wheels on the desired angle 'phi_desired '"""
pid_phi = PID(100.0, 500.0, 5.0, 100, -100)
t = 0
clock = Clock()
while t < 1: # FIXME: seems that need steady state condition
t, dt = clock.getTandDT()
phi_current = self.__motor_steer.position
error_phi = radians(phi_desired - phi_current)
u_phi = pid_phi.getControl(error_phi, dt)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
Sound.speak('Wheels were turned!')
def move(self,
vel_linear=None,
vel_angular=None,
trajectory=None,
mapping=None):
"""
Examples:
mode_1. move(trajectory=given_trajectory) --- following given trajectory;
mode_2. move(vel_linear=0.3, vel_angular=0.3) --- moving with given velocities;
mode_3. move(`mode_1 or mode_2`, mapping=mapping) --- moving and mapping.
"""
# initialization for current mode
if vel_linear and vel_angular not in [None]:
self.__velocity_controller.setTargetVelocities(
vel_linear, vel_angular)
clock = Clock()
while True:
try:
t, dt = clock.getTandDT()
theta, omega = [-x for x in self.__sensor_gyro.rate_and_angle
] # !!! returns ANGLE AND RATE :)
x, y, dx, dy = self.__localization.getData(
radians(theta), radians(self.__motor_rear.speed), dt)
self.__robot_state = [x, y, dx, dy, theta,
omega] # update state
if trajectory is not None:
point = trajectory.getCoordinates(t)
v_des, omega_des = self.__trajectory_controller.getControls(
point, x, y, dx, dy, radians(theta), dt)
self.__velocity_controller.setTargetVelocities(
v_des, omega_des)
u_v, u_phi = self.__velocity_controller.getControls(
radians(self.__motor_rear.speed),
radians(self.__motor_steer.position), radians(omega), dt)
if mapping is not None:
mapping.updateMap(x, y, radians(theta))
self.__motor_rear.run_direct(duty_cycle_sp=u_v)
self.__motor_steer.run_direct(duty_cycle_sp=u_phi)
if self.__button_halt.enter:
break
except KeyboardInterrupt:
break
# off motors
self.__motor_rear.duty_cycle_sp = 0
self.__motor_steer.duty_cycle_sp = 0
raise SystemExit