Merge from arosa.

.gitignore

 .vagrant/
 rna.img.xz
+__pycache__/
+*.pyc

.gitmodules

@@ -7,3 +7,9 @@
 [submodule "salt/prrt/files/PRRT"]
 	path = salt/prrt/files/PRRT
 	url = git@git.nt.uni-saarland.de:LARN/PRRT.git
+[submodule "salt/car/files/Adafruit-Motor-HAT-Python-Library"]
+	path = salt/car/files/Adafruit-Motor-HAT-Python-Library
+	url = https://github.com/adafruit/Adafruit-Motor-HAT-Python-Library.git
+[submodule "salt/video/files/gst-prrt"]
+	path = salt/video/files/gst-prrt
+	url = git@git.nt.uni-saarland.de:LARN/gst-prrt.git

Vagrantfile

@@ -33,6 +33,9 @@ Vagrant.configure("2") do |config|
   # within the machine from a port on the host machine. In the example below,
   # accessing "localhost:8080" will access port 80 on the guest machine.
 
+  config.vm.network "forwarded_port", guest: 4505, host: 4505
+  config.vm.network "forwarded_port", guest: 4506, host: 4506
+
   # Create a private network, which allows host-only access to the machine
   # using a specific IP.
   # config.vm.network "private_network", ip: "192.168.33.10"

pillar/top.sls

@@ -13,3 +13,5 @@ base:
         - sender
     'rna-06':
         - sender
+    'rna-07':
+        - sender

salt/apps/deploy.sls

 include:
-    - prrt
+    - prrt.dependencies
     - apps

RNA-Apps @ bb3aaed2

-Subproject commit 427692639d9e0d0f0b33bcc45545de9c72083f23
+Subproject commit bb3aaed240bcac33643fa36c750f8c9bf215d508

salt/apps/init.sls

@@ -17,3 +17,10 @@ demo_script:
         - user: rna
         - group: rna
         - file_mode: keep
+
+prrt_build_ext:
+    cmd.run:
+        - name: python setup.py install && python3 setup.py install
+        - cwd: /opt/rna/apps/PRRT
+        - require:
+            - pip: pip_modules

Adafruit-Motor-HAT-Python-Library @ f9e7c259

+Subproject commit f9e7c2592c5c720207b4e5040eb28e1628b48f49

salt/car/files/MotorControl.py

+
+from Adafruit_MotorHAT import Adafruit_MotorHAT, Adafruit_DCMotor
+
+import time
+import atexit
+
+# create a default object, no changes to I2C address or frequency
+mh = Adafruit_MotorHAT(addr=0x60)
+
+# recommended for auto-disabling motors on shutdown!
+def turnOffMotors():
+    mh.getMotor(1).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(2).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(3).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(4).run(Adafruit_MotorHAT.RELEASE)
+
+atexit.register(turnOffMotors)
+
+def _speedToDirection(speed):
+    if speed > 0:
+        return Adafruit_MotorHAT.FORWARD
+    elif speed < 0:
+        return Adafruit_MotorHAT.BACKWARD
+    else:
+        return Adafruit_MotorHAT.RELEASE
+
+def setSpeed(left, right):
+    right = int(right * 1.1)
+
+    mh.getMotor(1).run(_speedToDirection(left))
+    mh.getMotor(2).run(_speedToDirection(left))
+    mh.getMotor(3).run(_speedToDirection(right))
+    mh.getMotor(4).run(_speedToDirection(right))
+    mh.getMotor(1).setSpeed(abs(left))
+    mh.getMotor(2).setSpeed(abs(left))
+    mh.getMotor(3).setSpeed(abs(right))
+    mh.getMotor(4).setSpeed(abs(right))
+
+if __name__ == "__main__":
+    X  = 255
+    Y  = 4
+
+    while True:
+        print("right")
+        setSpeed(X/Y, X)
+        time.sleep(1)
+        print("stop")
+        setSpeed(0, 0)
+        time.sleep(1)
+        print("left")
+        setSpeed(-X/Y, 0-X)
+        time.sleep(1)
+
+    #    #print("right")
+    #    #setSpeed(50,100)
+    #    #time.sleep(0.5)
+    #    #setSpeed(100,200)
+    #    #time.sleep(0.5)
+    #    #setSpeed(50,100)
+    #    #time.sleep(1)
+    #    #print("left")
+    #    #setSpeed(100,50)
+    #    #time.sleep(1)
+    #    #setSpeed(200,100)
+    #    #time.sleep(1)
+    #    #setSpeed(100,50)
+    #    #time.sleep(1)
+    #    setSpeed(100,120)
+    #    time.sleep(0.1)
+    #    setSpeed(100,140)
+    #    time.sleep(0.1)
+    #    setSpeed(100,160)
+    #    time.sleep(0.1)
+    #    setSpeed(100,180)
+    #    time.sleep(0.1)
+    #    setSpeed(100,200)
+    #    time.sleep(0.1)
+    #    setSpeed(100,180)
+    #    time.sleep(0.1)
+    #    setSpeed(100,160)
+    #    time.sleep(0.1)
+    #    setSpeed(100,140)
+    #    time.sleep(0.1)
+    #    setSpeed(100,120)
+    #    time.sleep(0.1)

salt/car/files/actor.py

+import prrt
+import pickle
+from MotorControl import *
+
+socket = prrt.PrrtSocket(7000, isSender=False)
+while True:
+    u = socket.receive_asap_wait()
+    u_v = pickle.loads(u)
+    left = u_v[0]
+    right = u_v[1]
+    setSpeed(int(left), int(right))

salt/car/files/linefollow/controller.py

+import gi
+
+gi.require_version("Gst", "1.0")
+from gi.repository import Gst, GObject
+import cv2
+import numpy as np
+import logging
+import prrt
+import pickle
+from controller.lineDetect import *
+
+
+class Controller:
+    def __init__(self, port=5000, actor=("10.8.0.106", 8000)):
+        self.mainloop = GObject.MainLoop()
+        self.pipeline = None
+        self.main_loop = None
+        self.port = port
+        self.actor_socket = prrt.PrrtSocket(actor[1], True, target_delay=0.05)
+        self.actor_socket.connect(actor[0], actor[1])
+        Gst.init(None)
+
+    @staticmethod
+    def control(mean_angle):
+        v_d = 100
+        t_a = 1
+        p = .1  # gain, stability ensured with t_a as above
+        L = 12  # distance between left and right wheel (in cm)
+        # use a simple P controller approach for given sampling rate
+        u = np.empty(2)
+        u[0] = int(v_d - p * t_a * mean_angle * L / 2)
+        u[0] = min(255, max(0, u[0]))
+        u[1] = int(2 * v_d - u[0])
+        u[1] = min(255, max(0, u[1]))
+        return u
+
+    @staticmethod
+    def angle_from_image(img):
+        detected = detect_lines(img, 8)
+
+        # detected contains horizontal offsets (in pixels) from the x position of the red anchor,
+        # starting from the bottom
+        num_rows, num_cols, _ = img.shape
+        anchor_x = int(num_cols / 2)
+        anchor_y = int(num_rows / 16)
+
+        # compute the angle from the (pixel) differences
+        # use three anchor points
+        displacement = np.array([15, 13, 11, 9, 7, 5, 3, 1])
+        angles = np.arctan(detected / (num_rows - anchor_y * displacement))
+        sines = np.nansum(np.sin(angles))
+        cosines = np.nansum(np.cos(angles))
+        print(angles)
+        return np.rad2deg(np.arctan2(sines, cosines))
+
+    def create_buffer_handler(self):
+        def handler(appsink):
+            buf = appsink.emit("pull-sample").get_buffer()
+            memory = buf.get_all_memory()
+            success, info = memory.map(Gst.MapFlags.READ)
+            try:
+                if success:
+                    array = np.frombuffer(info.data, dtype='uint8')
+                    img = cv2.imdecode(array, 1)
+                    mean_angle = self.angle_from_image(img)
+                    print(mean_angle)
+                    if np.isnan(mean_angle):
+                        pass  # Do not control.
+                    else:
+                        u = self.control(mean_angle)
+                        print("Computed inputs left/right ({})".format(",".join([str(v) for v in u])))
+                        self.actor_socket.send(pickle.dumps(u))
+            except Exception:
+                logging.exception("")
+            finally:
+                memory.unmap(info)
+                return Gst.FlowReturn.OK
+
+        return handler
+
+    def setup_pipeline(self):
+        GObject.threads_init()
+        self.pipeline = Gst.Pipeline.new("sensor")
+        prrtsrc = Gst.ElementFactory.make("prrtsrc", "prrtsrc")
+        prrtsrc.set_property("port", self.port)
+
+        """
+        gst-launch-1.0 prrtsrc port=$1 \
+        ! jpegdec \
+        ! videoconvert \
+        ! ximagesink sync=false
+        """
+
+        tee = Gst.ElementFactory.make("tee", "tee")
+
+        queue_app = Gst.ElementFactory.make("queue", "queue_app")
+        queue_display = Gst.ElementFactory.make("queue", "queue_display")
+
+        jpegdec = Gst.ElementFactory.make("jpegdec", "jpegdec")
+        videoconvert = Gst.ElementFactory.make("videoconvert", "videoconvert")
+        ximagesink = Gst.ElementFactory.make("ximagesink", "ximagesink")
+        ximagesink.set_property("sync", False)
+
+        appsink = Gst.ElementFactory.make("appsink", "appsink")
+        appsink.set_property("drop", True)
+        appsink.set_property("emit-signals", True)
+        appsink.set_property("sync", True)
+        appsink.set_property("max-buffers", 1)
+
+
+        # Adding
+        self.pipeline.add(prrtsrc)
+        self.pipeline.add(tee)
+        self.pipeline.add(queue_app)
+        self.pipeline.add(queue_display)
+        self.pipeline.add(jpegdec)
+        self.pipeline.add(videoconvert)
+        self.pipeline.add(ximagesink)
+        self.pipeline.add(appsink)
+
+        # Connecting
+        appsink.connect("new-sample", self.create_buffer_handler())
+
+        # Linking
+        prrtsrc.link(tee)
+
+        tee.link(queue_app)
+        queue_app.link(appsink)
+
+        tee.link(queue_display)
+        queue_display.link(jpegdec)
+        jpegdec.link(videoconvert)
+        videoconvert.link(ximagesink)
+
+    def run(self):
+        self.setup_pipeline()
+
+        self.pipeline.set_state(Gst.State.PAUSED)
+        self.pipeline.set_state(Gst.State.PLAYING)
+
+        try:
+            self.mainloop.run()
+        except KeyboardInterrupt:
+            pass
+
+
+if __name__ == "__main__":
+    Controller().run()

salt/car/files/linefollow/controller/image.py

+import numpy as np
+import cv2
+
+
+class Image:
+    def __init__(self):
+        self.image = None
+        self.contour_center_x = 0
+        self.main_contour = None
+        self.contours = None
+        self.middle_x = np.nan
+        self.middle_y = np.nan
+        self.prev_mc = None
+        self.prev_cx = None
+        self.height = 0
+        self.width = 0
+        self.dir = 0
+
+    def process(self):
+        # Convert to Gray Scale
+        imgray = cv2.cvtColor(self.image, cv2.COLOR_BGR2GRAY)
+
+        # Get Threshold
+        ret, thresh = cv2.threshold(imgray, 100, 255, cv2.THRESH_BINARY_INV)
+
+        # Get contour
+        _, self.contours, _ = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
+
+        self.prev_mc = self.main_contour
+        if self.contours:
+            self.main_contour = max(self.contours, key=cv2.contourArea)
+
+            self.height, self.width = self.image.shape[:2]
+
+            self.middle_x = int(self.width / 2)  # Get X coordenate of the middle point
+            self.middle_y = int(self.height / 2)  # Get Y coordenate of the middle point
+
+            self.prev_cx = self.contour_center_x
+            if self.get_contour_center(self.main_contour) != 0:
+                self.contour_center_x = self.get_contour_center(self.main_contour)[0]
+                if abs(self.prev_cx - self.contour_center_x) > 5:
+                    self.correct_main_contour(self.prev_cx)
+            else:
+                self.contour_center_x = 0
+
+            self.dir = int((self.middle_x - self.contour_center_x) * self.get_contour_extent(self.main_contour))
+
+            cv2.drawContours(self.image, self.main_contour, -1, (0, 255, 0), 3)  # Draw Contour GREEN
+            cv2.circle(self.image, (self.contour_center_x, self.middle_y), 7, (255, 255, 255),
+                       -1)  # Draw dX circle WHITE
+            cv2.circle(self.image, (self.middle_x, self.middle_y), 3, (0, 0, 255), -1)  # Draw middle circle RED
+
+            font = cv2.FONT_HERSHEY_SIMPLEX
+            cv2.putText(self.image, str(self.middle_x - self.contour_center_x),
+                        (self.contour_center_x + 20, self.middle_y), font, 1, (200, 0, 200), 2, cv2.LINE_AA)
+            cv2.putText(self.image, "Weight:%.3f" % self.get_contour_extent(self.main_contour),
+                        (self.contour_center_x + 20, self.middle_y + 35), font, 0.5, (200, 0, 200), 1, cv2.LINE_AA)
+
+    @staticmethod
+    def get_contour_center(contour):
+        M = cv2.moments(contour)
+
+        if M["m00"] == 0:
+            return 0
+
+        x = int(M["m10"] / M["m00"])
+        y = int(M["m01"] / M["m00"])
+
+        return [x, y]
+
+    @staticmethod
+    def get_contour_extent(contour):
+        area = cv2.contourArea(contour)
+        x, y, w, h = cv2.boundingRect(contour)
+        rect_area = w * h
+        if rect_area > 0:
+            return float(area) / rect_area
+
+    @staticmethod
+    def approx(a, b, error):
+        if abs(a - b) < error:
+            return True
+        else:
+            return False
+
+    def correct_main_contour(self, prev_cx):
+        if abs(prev_cx - self.contour_center_x) > 5:
+            for i in range(len(self.contours)):
+                if self.get_contour_center(self.contours[i]) != 0:
+                    tmp_cx = self.get_contour_center(self.contours[i])[0]
+                    if self.approx(tmp_cx, prev_cx, 5):
+                        self.main_contour = self.contours[i]
+                        if self.get_contour_center(self.main_contour) != 0:
+                            self.contour_center_x = self.get_contour_center(self.main_contour)[0]

salt/car/files/linefollow/controller/lineDetect.py

+import numpy as np
+from .utils import *
+
+
+def detect_lines(image, point_count):
+    internal_images_buffer = []
+
+    for _ in range(point_count):
+        internal_images_buffer.append(Image())
+
+    img = remove_background(image, True)
+    if img is None:
+        return None
+
+    slice_part(img, internal_images_buffer, point_count)
+
+    output = np.array([0.0] * point_count)
+
+    for i in range(point_count):
+        if internal_images_buffer[i].main_contour is None:
+            output[point_count - 1 - i] = np.NaN
+        else:
+            output[point_count - 1 - i] = (internal_images_buffer[i].middle_x -
+                                           internal_images_buffer[i].contour_center_x)
+
+    return output

salt/car/files/linefollow/controller/utils.py

+import numpy as np
+import cv2
+from .image import *
+
+
+def slice_part(im, images, slices):
+    height, width = im.shape[:2]
+    sl = int(height / slices)
+
+    for i in range(slices):
+        part = sl * i
+        crop_img = im[part:part + sl, 0:width]
+        images[i].image = crop_img
+        images[i].process()
+
+
+def repack_images(images):
+    img = images[0].image
+    for i in range(len(images)):
+        if i == 0:
+            img = np.concatenate((img, images[1].image), axis=0)
+        if i > 1:
+            img = np.concatenate((img, images[i].image), axis=0)
+
+    return img
+
+
+def center(moments):
+    if moments["m00"] == 0:
+        return 0
+
+    x = int(moments["m10"] / moments["m00"])
+    y = int(moments["m01"] / moments["m00"])
+
+    return x, y
+
+
+def remove_background(image, b):
+    up = 50
+    # create NumPy arrays from the boundaries
+    lower = np.array([0, 0, 0], dtype="uint8")
+    upper = np.array([up, up, up], dtype="uint8")
+    # ----------------COLOR SELECTION-------------- (Remove any area that is whiter than 'upper')
+    if b:
+        mask = cv2.inRange(image, lower, upper)
+        image = cv2.bitwise_and(image, image, mask=mask)
+        image = cv2.bitwise_not(image, image, mask=mask)
+        image = (255 - image)
+        return image
+    else:
+        return image
+    # ////////////////COLOR SELECTION/////////////

salt/car/files/linefollow/motorControl.py

+from Adafruit_MotorHAT import Adafruit_MotorHAT, Adafruit_DCMotor
+
+import time
+import atexit
+
+# create a default object, no changes to I2C address or frequency
+mh = Adafruit_MotorHAT(addr=0x60)
+
+
+# recommended for auto-disabling motors on shutdown!
+def turnOffMotors():
+    mh.getMotor(1).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(2).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(3).run(Adafruit_MotorHAT.RELEASE)
+    mh.getMotor(4).run(Adafruit_MotorHAT.RELEASE)
+
+
+atexit.register(turnOffMotors)
+
+
+def _speedToDirection(speed):
+    if speed > 0:
+        return Adafruit_MotorHAT.FORWARD
+    elif speed < 0:
+        return Adafruit_MotorHAT.BACKWARD
+    else:
+        return Adafruit_MotorHAT.RELEASE
+
+
+def setSpeed(left, right):
+    right = int(right * 1.1)
+
+    mh.getMotor(1).run(_speedToDirection(left))
+    mh.getMotor(2).run(_speedToDirection(left))
+    mh.getMotor(3).run(_speedToDirection(right))
+    mh.getMotor(4).run(_speedToDirection(right))
+    mh.getMotor(1).setSpeed(abs(left))
+    mh.getMotor(2).setSpeed(abs(left))
+    mh.getMotor(3).setSpeed(abs(right))
+    mh.getMotor(4).setSpeed(abs(right))
+
+
+if __name__ == "__main__":
+    X = 255
+    Y = 4
+
+    while True:
+        print("right")
+        setSpeed(X // Y, X)
+        time.sleep(1)
+        print("stop")
+        setSpeed(0, 0)
+        time.sleep(1)
+        print("left")
+        setSpeed(-X // Y, 0 - X)
+        time.sleep(1)
+
+    #    #print("right")
+    #    #setSpeed(50,100)
+    #    #time.sleep(0.5)
+    #    #setSpeed(100,200)
+    #    #time.sleep(0.5)
+    #    #setSpeed(50,100)
+    #    #time.sleep(1)
+    #    #print("left")
+    #    #setSpeed(100,50)
+    #    #time.sleep(1)
+    #    #setSpeed(200,100)
+    #    #time.sleep(1)
+    #    #setSpeed(100,50)
+    #    #time.sleep(1)
+    #    setSpeed(100,120)
+    #    time.sleep(0.1)
+    #    setSpeed(100,140)
+    #    time.sleep(0.1)
+    #    setSpeed(100,160)
+    #    time.sleep(0.1)
+    #    setSpeed(100,180)
+    #    time.sleep(0.1)
+    #    setSpeed(100,200)
+    #    time.sleep(0.1)
+    #    setSpeed(100,180)
+    #    time.sleep(0.1)
+    #    setSpeed(100,160)
+    #    time.sleep(0.1)
+    #    setSpeed(100,140)
+    #    time.sleep(0.1)
+    #    setSpeed(100,120)
+    #    time.sleep(0.1)

salt/car/files/linefollow/plant.py

+import subprocess
+import prrt
+import signal
+import pickle
+import motorControl
+
+
+class Plant:
+    def __init__(self, actor_port=8000, controller=("10.8.0.16", 5000), target_delay=50000):
+        self.controller = controller
+        self.target_delay = target_delay
+        self.actor_port = actor_port
+
+    def run(self):
+        pipeline = 'raspivid -t 0 -cd MJPEG -w 800 -h 450 -fps 24 -b 8000000 -o - | gst-launch-1.0 fdsrc \
+                    ! "image/jpeg,framerate=24/1" \
+                    ! jpegparse \
+                    ! queue \
+                    ! prrtsink host={} port={} targetdelay={}'.format(self.controller[0], self.controller[1], self.target_delay)
+        p = subprocess.Popen(pipeline, shell=True)
+        try:
+            s = prrt.PrrtSocket(self.actor_port, False)
+            while True:
+                data = s.receive_ordered_wait(0.01)
+                if len(data) == 0:
+                    continue
+                else:
+                    u = pickle.loads(data)
+                    print(u)
+                    motorControl.setSpeed(int(u[0]), int(u[1]))
+        except KeyboardInterrupt:
+            pass
+        finally:
+            p.send_signal(signal.SIGINT)
+            p.wait()
+
+
+if __name__ == "__main__":
+    Plant().run()

salt/car/files/reference/Main.py

+import socket