def run(self, args):
from donkeycar.parts.actuator import PCA9685
from donkeycar.utils import Sombrero
s = Sombrero()
args = self.parse_args(args)
channel = int(args.channel)
busnum = None
if args.bus:
busnum = int(args.bus)
address = int(args.address, 16)
print('init PCA9685 on channel %d address %s bus %s' %
(channel, str(hex(address)), str(busnum)))
c = PCA9685(channel, address=address, busnum=busnum)
for i in range(10):
pmw = int(input('Enter a PWM setting to test(0-1500)'))
c.run(pmw)
def drive(cfg):
'''
Construct a working robotic vehicle from many parts.
Each part runs as a job in the Vehicle loop, calling either
it's run or run_threaded method depending on the constructor flag `threaded`.
All parts are updated one after another at the framerate given in
cfg.DRIVE_LOOP_HZ assuming each part finishes processing in a timely manner.
Parts may have named outputs and inputs. The framework handles passing named outputs
to parts requesting the same named input.
'''
#Initialize car
V = dk.vehicle.Vehicle()
if cfg.HAVE_SOMBRERO:
from donkeycar.utils import Sombrero
s = Sombrero()
ctr = get_js_controller(cfg)
V.add(ctr,
inputs=['null'],
outputs=['user/angle', 'user/throttle', 'user/mode', 'recording'],
threaded=True)
if cfg.HAVE_ODOM:
pi = pigpio.pi()
enc = PiPGIOEncoder(cfg.ODOM_PIN, pi)
V.add(enc, outputs=['enc/ticks'])
odom = OdomDist(mm_per_tick=cfg.MM_PER_TICK, debug=cfg.ODOM_DEBUG)
V.add(odom,
inputs=['enc/ticks', 'user/throttle'],
outputs=['enc/dist_m', 'enc/vel_m_s', 'enc/delta_vel_m_s'])
if not os.path.exists(cfg.WHEEL_ODOM_CALIB):
print(
"You must supply a json file when using odom with T265. There is a sample file in templates."
)
print(
"cp donkeycar/donkeycar/templates/calibration_odometry.json .")
exit(1)
else:
# we give the T265 no calib to indicated we don't have odom
cfg.WHEEL_ODOM_CALIB = None
#This dummy part to satisfy input needs of RS_T265 part.
class NoOdom():
def run(self):
return 0.0
V.add(NoOdom(), outputs=['enc/vel_m_s'])
# This requires use of the Intel Realsense T265
rs = RS_T265(image_output=False, calib_filename=cfg.WHEEL_ODOM_CALIB)
V.add(rs,
inputs=['enc/vel_m_s'],
outputs=['rs/pos', 'rs/vel', 'rs/acc', 'rs/camera/left/img_array'],
threaded=True)
# Pull out the realsense T265 position stream, output 2d coordinates we can use to map.
class PosStream:
def run(self, pos):
#y is up, x is right, z is backwards/forwards
return pos.x, pos.z
V.add(PosStream(), inputs=['rs/pos'], outputs=['pos/x', 'pos/y'])
# This part will reset the car back to the origin. You must put the car in the known origin
# and push the cfg.RESET_ORIGIN_BTN on your controller. This will allow you to induce an offset
# in the mapping.
origin_reset = OriginOffset()
V.add(origin_reset, inputs=['pos/x', 'pos/y'], outputs=['pos/x', 'pos/y'])
class UserCondition:
def run(self, mode):
if mode == 'user':
return True
else:
return False
V.add(UserCondition(), inputs=['user/mode'], outputs=['run_user'])
#See if we should even run the pilot module.
#This is only needed because the part run_condition only accepts boolean
class PilotCondition:
def run(self, mode):
if mode == 'user':
return False
else:
return True
V.add(PilotCondition(), inputs=['user/mode'], outputs=['run_pilot'])
# This is the path object. It will record a path when distance changes and it travels
# at least cfg.PATH_MIN_DIST meters. Except when we are in follow mode, see below...
path = Path(min_dist=cfg.PATH_MIN_DIST)
V.add(path,
inputs=['pos/x', 'pos/y'],
outputs=['path'],
run_condition='run_user')
# When a path is loaded, we will be in follow mode. We will not record.
path_loaded = False
if os.path.exists(cfg.PATH_FILENAME):
path.load(cfg.PATH_FILENAME)
path_loaded = True
def save_path():
path.save(cfg.PATH_FILENAME)
print("saved path:", cfg.PATH_FILENAME)
def erase_path():
global mode, path_loaded
if os.path.exists(cfg.PATH_FILENAME):
os.remove(cfg.PATH_FILENAME)
mode = 'user'
path_loaded = False
print("erased path", cfg.PATH_FILENAME)
else:
print("no path found to erase")
def reset_origin():
print("Resetting origin")
origin_reset.init_to_last
# Here's a trigger to save the path. Complete one circuit of your course, when you
# have exactly looped, or just shy of the loop, then save the path and shutdown
# this process. Restart and the path will be loaded.
ctr.set_button_down_trigger(cfg.SAVE_PATH_BTN, save_path)
# Here's a trigger to erase a previously saved path.
ctr.set_button_down_trigger(cfg.ERASE_PATH_BTN, erase_path)
# Here's a trigger to reset the origin.
ctr.set_button_down_trigger(cfg.RESET_ORIGIN_BTN, reset_origin)
# Here's an image we can map to.
img = PImage(clear_each_frame=True)
V.add(img, outputs=['map/image'])
# This PathPlot will draw path on the image
plot = PathPlot(scale=cfg.PATH_SCALE, offset=cfg.PATH_OFFSET)
V.add(plot, inputs=['map/image', 'path'], outputs=['map/image'])
# This will use path and current position to output cross track error
cte = CTE()
V.add(cte,
inputs=['path', 'pos/x', 'pos/y'],
outputs=['cte/error'],
run_condition='run_pilot')
# This will use the cross track error and PID constants to try to steer back towards the path.
pid = PIDController(p=cfg.PID_P, i=cfg.PID_I, d=cfg.PID_D)
pilot = PID_Pilot(pid, cfg.PID_THROTTLE)
V.add(pilot,
inputs=['cte/error'],
outputs=['pilot/angle', 'pilot/throttle'],
run_condition="run_pilot")
def dec_pid_d():
pid.Kd -= 0.5
logging.info("pid: d- %f" % pid.Kd)
def inc_pid_d():
pid.Kd += 0.5
logging.info("pid: d+ %f" % pid.Kd)
# Buttons to tune PID constants
ctr.set_button_down_trigger("L2", dec_pid_d)
ctr.set_button_down_trigger("R2", inc_pid_d)
# Plot a circle on the map where the car is located
carcolor = 'green'
loc_plot = PlotCircle(scale=cfg.PATH_SCALE,
offset=cfg.PATH_OFFSET,
color=carcolor)
V.add(loc_plot,
inputs=['map/image', 'pos/x', 'pos/y'],
outputs=['map/image'])
#This web controller will create a web server. We aren't using any controls, just for visualization.
web_ctr = WebFpv()
V.add(web_ctr, inputs=['map/image'], threaded=True)
#Choose what inputs should change the car.
class DriveMode:
def run(self, mode, user_angle, user_throttle, pilot_angle,
pilot_throttle):
if mode == 'user':
#print(user_angle, user_throttle)
return user_angle, user_throttle
elif mode == 'local_angle':
return pilot_angle, user_throttle
else:
return pilot_angle, pilot_throttle
V.add(DriveMode(),
inputs=[
'user/mode', 'user/angle', 'user/throttle', 'pilot/angle',
'pilot/throttle'
],
outputs=['angle', 'throttle'])
if not cfg.DONKEY_GYM:
steering_controller = PCA9685(cfg.STEERING_CHANNEL,
cfg.PCA9685_I2C_ADDR,
busnum=cfg.PCA9685_I2C_BUSNUM)
steering = PWMSteering(controller=steering_controller,
left_pulse=cfg.STEERING_LEFT_PWM,
right_pulse=cfg.STEERING_RIGHT_PWM)
throttle_controller = PCA9685(cfg.THROTTLE_CHANNEL,
cfg.PCA9685_I2C_ADDR,
busnum=cfg.PCA9685_I2C_BUSNUM)
throttle = PWMThrottle(controller=throttle_controller,
max_pulse=cfg.THROTTLE_FORWARD_PWM,
zero_pulse=cfg.THROTTLE_STOPPED_PWM,
min_pulse=cfg.THROTTLE_REVERSE_PWM)
V.add(steering, inputs=['angle'])
V.add(throttle, inputs=['throttle'])
# Print Joystick controls
ctr.print_controls()
if path_loaded:
print(
"###############################################################################"
)
print("Loaded path:", cfg.PATH_FILENAME)
print("Make sure your car is sitting at the origin of the path.")
print("View web page and refresh. You should see your path.")
print("Hit 'select' twice to change to ai drive mode.")
print(
"You can press the X button (e-stop) to stop the car at any time.")
print("Delete file", cfg.PATH_FILENAME, "and re-start")
print("to record a new path.")
print(
"###############################################################################"
)
carcolor = "blue"
loc_plot = PlotCircle(scale=cfg.PATH_SCALE,
offset=cfg.PATH_OFFSET,
color=carcolor)
V.add(loc_plot,
inputs=['map/image', 'pos/x', 'pos/y'],
outputs=['map/image'])
else:
print(
"###############################################################################"
)
print("You are now in record mode. Open the web page to your car")
print("and as you drive you should see a path.")
print("Complete one circuit of your course.")
print("When you have exactly looped, or just shy of the ")
print("loop, then save the path (press %s)." % cfg.SAVE_PATH_BTN)
print("You can also erase a path with the Triangle button.")
print("When you're done, close this process with Ctrl+C.")
print("Place car exactly at the start. ")
print("Then restart the car with 'python manage drive'.")
print("It will reload the path and you will be ready to ")
print("follow the path using 'select' to change to ai drive mode.")
print("You can also press the Square button to reset the origin")
print(
"###############################################################################"
)
V.start(rate_hz=cfg.DRIVE_LOOP_HZ, max_loop_count=cfg.MAX_LOOPS)
def drive(cfg, model_path=None, use_joystick=False, model_type=None, camera_type='single', meta=[] ):
'''
Construct a working robotic vehicle from many parts.
Each part runs as a job in the Vehicle loop, calling either
it's run or run_threaded method depending on the constructor flag `threaded`.
All parts are updated one after another at the framerate given in
cfg.DRIVE_LOOP_HZ assuming each part finishes processing in a timely manner.
Parts may have named outputs and inputs. The framework handles passing named outputs
to parts requesting the same named input.
'''
if cfg.DONKEY_GYM:
#the simulator will use cuda and then we usually run out of resources
#if we also try to use cuda. so disable for donkey_gym.
os.environ["CUDA_VISIBLE_DEVICES"]="-1"
if model_type is None:
if cfg.TRAIN_LOCALIZER:
model_type = "localizer"
elif cfg.TRAIN_BEHAVIORS:
model_type = "behavior"
else:
model_type = "categorical"
#Initialize car
V = dk.vehicle.Vehicle()
if camera_type == "stereo":
if cfg.CAMERA_TYPE == "WEBCAM":
from donkeycar.parts.camera import Webcam
camA = Webcam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH, iCam = 0)
camB = Webcam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH, iCam = 1)
elif cfg.CAMERA_TYPE == "CVCAM":
from donkeycar.parts.cv import CvCam
camA = CvCam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH, iCam = 0)
camB = CvCam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH, iCam = 1)
else:
raise(Exception("Unsupported camera type: %s" % cfg.CAMERA_TYPE))
V.add(camA, outputs=['cam/image_array_a'], threaded=True)
V.add(camB, outputs=['cam/image_array_b'], threaded=True)
from donkeycar.parts.image import StereoPair
V.add(StereoPair(), inputs=['cam/image_array_a', 'cam/image_array_b'],
outputs=['cam/image_array'])
else:
inputs = []
threaded = True
print("cfg.CAMERA_TYPE", cfg.CAMERA_TYPE)
if cfg.DONKEY_GYM:
from donkeycar.parts.dgym import DonkeyGymEnv
cam = DonkeyGymEnv(cfg.DONKEY_SIM_PATH, env_name=cfg.DONKEY_GYM_ENV_NAME)
threaded = True
inputs = ['angle', 'throttle']
elif cfg.CAMERA_TYPE == "PICAM":
from donkeycar.parts.camera import PiCamera
cam = PiCamera(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH)
elif cfg.CAMERA_TYPE == "WEBCAM":
from donkeycar.parts.camera import Webcam
cam = Webcam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH)
elif cfg.CAMERA_TYPE == "CVCAM":
from donkeycar.parts.cv import CvCam
cam = CvCam(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH)
elif cfg.CAMERA_TYPE == "MOCK":
from donkeycar.parts.camera import MockCamera
cam = MockCamera(image_w=cfg.IMAGE_W, image_h=cfg.IMAGE_H, image_d=cfg.IMAGE_DEPTH)
else:
raise(Exception("Unkown camera type: %s" % cfg.CAMERA_TYPE))
V.add(cam, inputs=inputs, outputs=['cam/image_array'], threaded=threaded)
if use_joystick or cfg.USE_JOYSTICK_AS_DEFAULT:
#modify max_throttle closer to 1.0 to have more power
#modify steering_scale lower than 1.0 to have less responsive steering
from donkeycar.parts.controller import PS3JoystickController, PS4JoystickController, NimbusController, XboxOneJoystickController
cont_class = PS3JoystickController
if cfg.CONTROLLER_TYPE == "ps4":
cont_class = PS4JoystickController
elif cfg.CONTROLLER_TYPE == "nimbus":
cont_class = NimbusController
elif cfg.CONTROLLER_TYPE == "xbox":
cont_class = XboxOneJoystickController
ctr = cont_class(throttle_scale=cfg.JOYSTICK_MAX_THROTTLE,
steering_scale=cfg.JOYSTICK_STEERING_SCALE,
auto_record_on_throttle=cfg.AUTO_RECORD_ON_THROTTLE)
ctr.set_deadzone(cfg.JOYSTICK_DEADZONE)
if cfg.USE_NETWORKED_JS:
from donkeycar.parts.controller import JoyStickSub
netwkJs = JoyStickSub(cfg.NETWORK_JS_SERVER_IP)
V.add(netwkJs, threaded=True)
ctr.js = netwkJs
else:
#This web controller will create a web server that is capable
#of managing steering, throttle, and modes, and more.
ctr = LocalWebController()
V.add(ctr,
inputs=['cam/image_array'],
outputs=['user/angle', 'user/throttle', 'user/mode', 'recording'],
threaded=True)
#this throttle filter will allow one tap back for esc reverse
th_filter = ThrottleFilter()
V.add(th_filter, inputs=['user/throttle'], outputs=['user/throttle'])
#See if we should even run the pilot module.
#This is only needed because the part run_condition only accepts boolean
class PilotCondition:
def run(self, mode):
if mode == 'user':
return False
else:
return True
V.add(PilotCondition(), inputs=['user/mode'], outputs=['run_pilot'])
class LedConditionLogic:
def __init__(self, cfg):
self.cfg = cfg
def run(self, mode, recording, recording_alert, behavior_state, model_file_changed, track_loc):
#returns a blink rate. 0 for off. -1 for on. positive for rate.
if track_loc is not None:
led.set_rgb(*self.cfg.LOC_COLORS[track_loc])
return -1
if model_file_changed:
led.set_rgb(self.cfg.MODEL_RELOADED_LED_R, self.cfg.MODEL_RELOADED_LED_G, self.cfg.MODEL_RELOADED_LED_B)
return 0.1
else:
led.set_rgb(self.cfg.LED_R, self.cfg.LED_G, self.cfg.LED_B)
if recording_alert:
led.set_rgb(*recording_alert)
return self.cfg.REC_COUNT_ALERT_BLINK_RATE
else:
led.set_rgb(self.cfg.LED_R, self.cfg.LED_G, self.cfg.LED_B)
if behavior_state is not None and model_type == 'behavior':
r, g, b = self.cfg.BEHAVIOR_LED_COLORS[behavior_state]
led.set_rgb(r, g, b)
return -1 #solid on
if recording:
return -1 #solid on
elif mode == 'user':
return 1
elif mode == 'local_angle':
return 0.5
elif mode == 'local':
return 0.1
return 0
if cfg.HAVE_RGB_LED and not cfg.DONKEY_GYM:
from donkeycar.parts.led_status import RGB_LED
led = RGB_LED(cfg.LED_PIN_R, cfg.LED_PIN_G, cfg.LED_PIN_B, cfg.LED_INVERT)
led.set_rgb(cfg.LED_R, cfg.LED_G, cfg.LED_B)
V.add(LedConditionLogic(cfg), inputs=['user/mode', 'recording', "records/alert", 'behavior/state', 'modelfile/modified', "pilot/loc"],
outputs=['led/blink_rate'])
V.add(led, inputs=['led/blink_rate'])
def get_record_alert_color(num_records):
col = (0, 0, 0)
for count, color in cfg.RECORD_ALERT_COLOR_ARR:
if num_records >= count:
col = color
return col
class RecordTracker:
def __init__(self):
self.last_num_rec_print = 0
self.dur_alert = 0
self.force_alert = 0
def run(self, num_records):
if num_records is None:
return 0
if self.last_num_rec_print != num_records or self.force_alert:
self.last_num_rec_print = num_records
if num_records % 10 == 0:
print("recorded", num_records, "records")
if num_records % cfg.REC_COUNT_ALERT == 0 or self.force_alert:
self.dur_alert = num_records // cfg.REC_COUNT_ALERT * cfg.REC_COUNT_ALERT_CYC
self.force_alert = 0
if self.dur_alert > 0:
self.dur_alert -= 1
if self.dur_alert != 0:
return get_record_alert_color(num_records)
return 0
rec_tracker_part = RecordTracker()
V.add(rec_tracker_part, inputs=["tub/num_records"], outputs=['records/alert'])
if cfg.AUTO_RECORD_ON_THROTTLE and isinstance(ctr, JoystickController):
#then we are not using the circle button. hijack that to force a record count indication
def show_record_acount_status():
rec_tracker_part.last_num_rec_print = 0
rec_tracker_part.force_alert = 1
ctr.set_button_down_trigger('circle', show_record_acount_status)
#Sombrero
if cfg.HAVE_SOMBRERO:
from donkeycar.utils import Sombrero
s = Sombrero()
#IMU
if cfg.HAVE_IMU:
imu = Mpu6050()
V.add(imu, outputs=['imu/acl_x', 'imu/acl_y', 'imu/acl_z',
'imu/gyr_x', 'imu/gyr_y', 'imu/gyr_z'], threaded=True)
#Behavioral state
if cfg.TRAIN_BEHAVIORS:
bh = BehaviorPart(cfg.BEHAVIOR_LIST)
V.add(bh, outputs=['behavior/state', 'behavior/label', "behavior/one_hot_state_array"])
try:
ctr.set_button_down_trigger('L1', bh.increment_state)
except:
pass
inputs = ['cam/image_array', "behavior/one_hot_state_array"]
#IMU
elif model_type == "imu":
assert(cfg.HAVE_IMU)
#Run the pilot if the mode is not user.
inputs=['cam/image_array',
'imu/acl_x', 'imu/acl_y', 'imu/acl_z',
'imu/gyr_x', 'imu/gyr_y', 'imu/gyr_z']
else:
inputs=['cam/image_array']
def load_model(kl, model_path):
start = time.time()
try:
print('loading model', model_path)
kl.load(model_path)
print('finished loading in %s sec.' % (str(time.time() - start)) )
except Exception as e:
print(e)
print('ERR>> problems loading model', model_path)
def load_weights(kl, weights_path):
start = time.time()
try:
print('loading model weights', weights_path)
kl.model.load_weights(weights_path)
print('finished loading in %s sec.' % (str(time.time() - start)) )
except Exception as e:
print(e)
print('ERR>> problems loading weights', weights_path)
def load_model_json(kl, json_fnm):
start = time.time()
print('loading model json', json_fnm)
import keras
try:
with open(json_fnm, 'r') as handle:
contents = handle.read()
kl.model = keras.models.model_from_json(contents)
print('finished loading json in %s sec.' % (str(time.time() - start)) )
except Exception as e:
print(e)
print("ERR>> problems loading model json", json_fnm)
if model_path:
#When we have a model, first create an appropriate Keras part
kl = dk.utils.get_model_by_type(model_type, cfg)
model_reload_cb = None
if '.h5' in model_path:
#when we have a .h5 extension
#load everything from the model file
load_model(kl, model_path)
def reload_model(filename):
load_model(kl, filename)
model_reload_cb = reload_model
elif '.json' in model_path:
#when we have a .json extension
#load the model from their and look for a matching
#.wts file with just weights
load_model_json(kl, model_path)
weights_path = model_path.replace('.json', '.weights')
load_weights(kl, weights_path)
def reload_weights(filename):
weights_path = filename.replace('.json', '.weights')
load_weights(kl, weights_path)
model_reload_cb = reload_weights
#this part will signal visual LED, if connected
V.add(FileWatcher(model_path, verbose=True), outputs=['modelfile/modified'])
#these parts will reload the model file, but only when ai is running so we don't interrupt user driving
V.add(FileWatcher(model_path), outputs=['modelfile/dirty'], run_condition="ai_running")
V.add(DelayedTrigger(100), inputs=['modelfile/dirty'], outputs=['modelfile/reload'], run_condition="ai_running")
V.add(TriggeredCallback(model_path, model_reload_cb), inputs=["modelfile/reload"], run_condition="ai_running")
outputs=['pilot/angle', 'pilot/throttle']
if cfg.TRAIN_LOCALIZER:
outputs.append("pilot/loc")
V.add(kl, inputs=inputs,
outputs=outputs,
run_condition='run_pilot')
#Choose what inputs should change the car.
class DriveMode:
def run(self, mode,
user_angle, user_throttle,
pilot_angle, pilot_throttle):
if mode == 'user':
return user_angle, user_throttle
elif mode == 'local_angle':
return pilot_angle, user_throttle
else:
return pilot_angle, pilot_throttle
V.add(DriveMode(),
inputs=['user/mode', 'user/angle', 'user/throttle',
'pilot/angle', 'pilot/throttle'],
outputs=['angle', 'throttle'])
#to give the car a boost when starting ai mode in a race.
aiLauncher = AiLaunch(cfg.AI_LAUNCH_DURATION, cfg.AI_LAUNCH_THROTTLE)
V.add(aiLauncher,
inputs=['user/mode', 'throttle'],
outputs=['throttle'])
if isinstance(ctr, JoystickController):
ctr.set_button_down_trigger(cfg.AI_LAUNCH_ENABLE_BUTTON, aiLauncher.do_enable)
class AiRunCondition:
'''
A bool part to let us know when ai is running.
'''
def run(self, mode):
if mode == "user":
return False
return True
V.add(AiRunCondition(), inputs=['user/mode'], outputs=['ai_running'])
#Ai Recording
class AiRecordingCondition:
'''
return True when ai mode, otherwize respect user mode recording flag
'''
def run(self, mode, recording):
if mode == 'user':
return recording
return True
if cfg.RECORD_DURING_AI:
V.add(AiRecordingCondition(), inputs=['user/mode', 'recording'], outputs=['recording'])
#Drive train setup
if cfg.DONKEY_GYM:
pass
elif cfg.DRIVE_TRAIN_TYPE == "SERVO_ESC":
from donkeycar.parts.actuator import PCA9685, PWMSteering, PWMThrottle
steering_controller = PCA9685(cfg.STEERING_CHANNEL, cfg.PCA9685_I2C_ADDR, busnum=cfg.PCA9685_I2C_BUSNUM)
steering = PWMSteering(controller=steering_controller,
left_pulse=cfg.STEERING_LEFT_PWM,
right_pulse=cfg.STEERING_RIGHT_PWM)
throttle_controller = PCA9685(cfg.THROTTLE_CHANNEL, cfg.PCA9685_I2C_ADDR, busnum=cfg.PCA9685_I2C_BUSNUM)
throttle = PWMThrottle(controller=throttle_controller,
max_pulse=cfg.THROTTLE_FORWARD_PWM,
zero_pulse=cfg.THROTTLE_STOPPED_PWM,
min_pulse=cfg.THROTTLE_REVERSE_PWM)
V.add(steering, inputs=['angle'])
V.add(throttle, inputs=['throttle'])
elif cfg.DRIVE_TRAIN_TYPE == "DC_STEER_THROTTLE":
from donkeycar.parts.actuator import Mini_HBridge_DC_Motor_PWM
steering = Mini_HBridge_DC_Motor_PWM(cfg.HBRIDGE_PIN_LEFT, cfg.HBRIDGE_PIN_RIGHT)
throttle = Mini_HBridge_DC_Motor_PWM(cfg.HBRIDGE_PIN_FWD, cfg.HBRIDGE_PIN_BWD)
V.add(steering, inputs=['angle'])
V.add(throttle, inputs=['throttle'])
elif cfg.DRIVE_TRAIN_TYPE == "DC_TWO_WHEEL":
from donkeycar.parts.actuator import TwoWheelSteeringThrottle, Mini_HBridge_DC_Motor_PWM
left_motor = Mini_HBridge_DC_Motor_PWM(cfg.HBRIDGE_PIN_LEFT_FWD, cfg.HBRIDGE_PIN_LEFT_BWD)
right_motor = Mini_HBridge_DC_Motor_PWM(cfg.HBRIDGE_PIN_RIGHT_FWD, cfg.HBRIDGE_PIN_RIGHT_BWD)
two_wheel_control = TwoWheelSteeringThrottle()
V.add(two_wheel_control,
inputs=['throttle', 'angle'],
outputs=['left_motor_speed', 'right_motor_speed'])
V.add(left_motor, inputs=['left_motor_speed'])
V.add(right_motor, inputs=['right_motor_speed'])
elif cfg.DRIVE_TRAIN_TYPE == "SERVO_HBRIDGE_PWM":
from donkeycar.parts.actuator import ServoBlaster, PWMSteering
steering_controller = ServoBlaster(cfg.STEERING_CHANNEL) #really pin
#PWM pulse values should be in the range of 100 to 200
assert(cfg.STEERING_LEFT_PWM <= 200)
assert(cfg.STEERING_RIGHT_PWM <= 200)
steering = PWMSteering(controller=steering_controller,
left_pulse=cfg.STEERING_LEFT_PWM,
right_pulse=cfg.STEERING_RIGHT_PWM)
from donkeycar.parts.actuator import Mini_HBridge_DC_Motor_PWM
motor = Mini_HBridge_DC_Motor_PWM(cfg.HBRIDGE_PIN_FWD, cfg.HBRIDGE_PIN_BWD)
V.add(steering, inputs=['angle'])
V.add(motor, inputs=["throttle"])
class RewardSignal:
def __init__(self, nominal_reward=1.0, max_neg=-10.0, neg_time_ramp_steps=60):
self.nominal_reward = nominal_reward
self.max_neg = max_neg
self.tub = None
self.neg_time_ramp_steps = neg_time_ramp_steps
def set_tub(self, tub):
self.tub = tub
def apply_neg_reward(self):
import json
if self.tub is None:
return
iRecord = self.tub.current_ix
iStop = iRecord - self.neg_time_ramp_steps
reward = self.max_neg
dr = -1.0 * self.max_neg / self.neg_time_ramp_steps
while iRecord > iStop and iRecord > -1:
path = self.tub.get_json_record_path(iRecord)
iRecord = iRecord - 1
with open(path, 'r') as fp:
json_data = json.load(fp)
json_data['reward/value'] = reward
print("writing reward", reward)
with open(path, 'w') as fp:
json.dump(json_data, fp)
reward += dr
def run(self):
return self.nominal_reward
if cfg.USE_REWARDS:
rewardSig = RewardSignal()
V.add(rewardSig, inputs=[], outputs=["reward/value"])
#add tub to save data
inputs=['cam/image_array',
'user/angle', 'user/throttle',
'user/mode', 'reward/value']
types=['image_array',
'float', 'float',
'str', "float"]
if cfg.TRAIN_BEHAVIORS:
inputs += ['behavior/state', 'behavior/label', "behavior/one_hot_state_array"]
types += ['int', 'str', 'vector']
if cfg.HAVE_IMU:
inputs += ['imu/acl_x', 'imu/acl_y', 'imu/acl_z',
'imu/gyr_x', 'imu/gyr_y', 'imu/gyr_z']
types +=['float', 'float', 'float',
'float', 'float', 'float']
if cfg.RECORD_DURING_AI:
inputs += ['pilot/angle', 'pilot/throttle']
types += ['float', 'float']
th = TubHandler(path=cfg.DATA_PATH)
tub = th.new_tub_writer(inputs=inputs, types=types, user_meta=meta)
V.add(tub, inputs=inputs, outputs=["tub/num_records"], run_condition='recording')
if cfg.PUB_CAMERA_IMAGES:
from donkeycar.parts.network import TCPServeValue
from donkeycar.parts.image import ImgArrToJpg
pub = TCPServeValue("camera")
V.add(ImgArrToJpg(), inputs=['cam/image_array'], outputs=['jpg/bin'])
V.add(pub, inputs=['jpg/bin'])
if type(ctr) is LocalWebController:
print("You can now go to <your pi ip address>:8887 to drive your car.")
elif isinstance(ctr, JoystickController):
print("You can now move your joystick to drive your car.")
#tell the controller about the tub
ctr.set_tub(tub)
#replace the delete button with neg reward
if cfg.USE_REWARDS:
rewardSig.set_tub(tub)
ctr.set_button_down_trigger('triangle', rewardSig.apply_neg_reward)
if cfg.BUTTON_PRESS_NEW_TUB:
def new_tub_dir():
V.parts.pop()
tub = th.new_tub_writer(inputs=inputs, types=types, user_meta=meta)
V.add(tub, inputs=inputs, outputs=["tub/num_records"], run_condition='recording')
ctr.set_tub(tub)
ctr.set_button_down_trigger('cross', new_tub_dir)
#run the vehicle for 20 seconds
V.start(rate_hz=cfg.DRIVE_LOOP_HZ,
max_loop_count=cfg.MAX_LOOPS)