NMEA2000-Code weiterbearbeitet

nmea2000/boatdata.py

@@ -79,11 +79,13 @@ import datetime
 import time
 import math
 import random
+#from .lookup import fluidtype
+from . import lookup
 
 class BoatValue():
-    '''
+    """
     Wert mit Datentyp, Einheit, Validekennzeichen und Skalierungsfaktor
-    '''
+    """
 
     placeholder = '---'
 
@@ -299,18 +301,23 @@ class BoatValuePressure(BoatValue):
             return self.placeholder
 
 class Tank():
+    """
+    Die Instanz beziegt sich auf den Typ. So kann die Instanz 0
+    für einen Wassertank und einen Dieseltank existieren
+    """
 
     def __init__(self, instance=0):
-        self.instance = instance
         self.fluidtype = 1 # water -> lookup
-        self.volume = None
+        self.instance = instance
-        self.capacity = None
+        self.level = None # percent
+        self.capacity = None # liter
         self.desc = "" # long description
 
     def __str__(self):
-        out = f"  Tank #{self.instance}"
+        typedesc = lookup.fluidtype[self.fluidtype]
+        out = f"  Tank / {typedesc}: #{self.instance}\n"
         out += f"    Capacity: {self.capacity} l\n"
-        out += f"    Fluid level: {self.volume} l\n"
+        out += f"    Fluid level: {self.level} %\n"
         return out
 
 class Engine():
@@ -505,9 +512,9 @@ class BoatData():
         out += f"  Longitude: {self.lon.value}\n"
         out += f"  SOG: {self.sog}\n"
         for e in self.engine.values():
-            print(e)
+            out += str(e)
         for t in self.tank.values():
-            print(t)
+            out += str(t)
         out += "  Satellite info\n"
         for s in self.sat.values():
             out += str(s)

nmea2000/device.py

@@ -1,32 +1,39 @@
+"""
+NMEA2000-Gerät
+- auf dem Bus erkannte Geräte
+- für das eigene Gerät steht initUid() zur Verfügung
 
-'''
+"""
-Platzhalter WIP
-- ausprogrammieren nach Bedarf
-Geräteliste
- - wird regelmäßig aktualisiert
-
-'''
 
 import time
 import struct
+from . import lookup
 
 class Device():
 
     def __init__(self, address):
-        #WIP
+        # WIP: Felder können sich noch ändern!
-        #Felder können sich noch ändern!
+        self.address = address       # Kann sich zur Laufzeit ändern
-        self.address = address
-        self.instance = 0            # default 0
-        self.sysinstance = 0         # used with bridged networks, default 0
         self.lastseen = time.time()
-        self.uniqueid = None
+        self.lastpinfo = None        # Wann letztes Mal Productinfo erhalten?
-        self.manufacturercode = None
+        self.lastcinfo = None        # Wann letztes Mal Configurationinfo erhalten?
+        self.has_cinfo = True        # Weitere Abfragen können verhindert werden
+
+        # Device info
+        self.NAME = 0                # Wird über Address-Claim gefüllt
+        self.uniqueid = None         # Z.B. aus der Geräteseriennummer abgeleitet
+        self.manufacturercode = 2046 # Open Boat Projects
+        self.instance = 0            # default 0
+        self.instlower = 0           # 3bit, ISO ECU Instance
+        self.instupper = 0           # 5bit, ISO Function Instance
+        self.sysinstance = 0         # used with bridged networks, default 0
         self.industrygroup = None
-        self.name = None                # User defined device name
-        self.product = None             # Product name
-        self.productcode = None         # Product code
         self.devicefunction = None
         self.deviceclass = None
+
+        # Product info
+        self.product = None             # Product name
+        self.productcode = None         # Product code
         self.serial = None
         self.modelvers = None 		# Hardware Version
         self.softvers = None            # Current Software Version
@@ -34,30 +41,80 @@ class Device():
         self.certlevel = None           # NMEA2000 Certification Level
         self.loadequiv = None           # NMEA2000 LEN
 
-        # Configuration Info
+        # Configuration info
         self.instdesc1 = None
         self.instdesc2 = None
         self.manufinfo = None 
 
-    def getName(self):
+        # Additional data
-        # NAME errechnen aus den Claim-Daten
+        self.customname = None          # User defined device name
-        # TODO Das hier ist noch fehlerhaft!
+
+    def _ISOtime(self, epoch):
+        if not epoch:
+            return "n/a"
+        return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(epoch))
+
+    def initUid(self):
+        # Initialize unique id from raspi cpu id and return 21bit value
+        with open("/sys/firmware/devicetree/base/serial-number", "r") as f:
+            hexid = f.read().rstrip('\x00')
+        return int(hexid, 16) & 0x001FFFFF # 21bit mask
+
+    def getNAME(self):
+        """
+        NAME is unique on bus
+        """
         data = bytearray()
-        data.append((self.deviceclass << 4) | (self.devicefunction & 0x0f))
+        data.extend(struct.pack('<I', (self.uniqueid & 0x001fffff) | (self.manufacturercode << 21)))
-        data.extend(struct.pack('<L', self.uniqueid))
+        data.append((self.instlower & 0x07) | ((self.instupper & 0x1f) << 3))
-        data.extend(struct.pack('<L', self.manufacturercode))
+        data.append(self.devicefunction)
-        data.extend(struct.pack('<L', self.industrygroup))
+        data.append((self.deviceclass & 0x7f) << 1)
+        data.append(0x80 | ((self.industrygroup & 0x07) << 4) | (self.sysinstance & 0x0f))
         return data
 
     def __str__(self):
-        out = f"Device: {self.address} : '{self.product}'\n"
+        intNAME = int.from_bytes(self.getNAME())
-        out += f"  Instance: {self.instance}\n"
+        out =  f"Device: {self.address} : '{self.product}'\n"
-        out += f"  Product Code: {self.productcode}\n"
+        out +=  "  NAME: {} ({})\n".format(self.getNAME(), intNAME)
-        out += f"  Product: {self.product}\n"
+        out +=  "  last seen: {}\n".format(self._ISOtime(self.lastseen))
-        out += f"  Serial: {self.serial}\n"
+        out +=  "  Device info\n"
-        out += f"  Model Version: {self.modelvers}\n"
+        out += f"    Unique ID: {self.uniqueid}\n"
-        out += f"  Software Version: {self.softvers}\n"
+        out += f"    Instance: {self.instance} ({self.instupper}/{self.instlower})\n"
-        out += f"  NMEA2000 Version: {self.n2kvers}\n"
+        out += f"    System instance: {self.sysinstance}\n"
-        out += f"  Cert-Level: {self.certlevel}\n"
+        try:
-        out += f"  LEN: {self.loadequiv}"
+            devfnname = lookup.devicefunction[self.deviceclass][self.devicefunction]
+        except KeyError:
+            devfnname = "*key error*"
+        out += f"    Device function: {devfnname} ({self.devicefunction})\n"
+        try:
+            devclassname = lookup.deviceclass[self.deviceclass]
+        except KeyError:
+            devclassname = "*key error*"
+        out += f"    Device class: {devclassname} ({self.deviceclass})\n"
+        try:
+            igrpname = lookup.industrygroup[self.industrygroup]
+        except KeyError:
+            igrpname = "*key error*"
+        out += f"    Industry group: {igrpname} ({self.industrygroup})\n"
+        try:
+            manufname = lookup.manufacturer[self.manufacturercode]
+        except KeyError:
+            manufname = "*key error*"
+        out += f"    Manufacturer code: {manufname} ({self.manufacturercode})\n"
+        out +=  "  Product info at {}\n".format(self._ISOtime(self.lastpinfo))
+        out += f"    Product Code: {self.productcode}\n"
+        out += f"    Product: {self.product}\n"
+        out += f"    Serial: {self.serial}\n"
+        out += f"    Model Version: {self.modelvers}\n"
+        out += f"    Software Version: {self.softvers}\n"
+        out += f"    NMEA2000 Version: {self.n2kvers}\n"
+        out += f"    Cert-Level: {lookup.certlevel[self.certlevel]} ({self.certlevel})\n"
+        out += f"    LEN: {self.loadequiv}\n"
+        out +=  "  Configuration info at {}\n".format(self._ISOtime(self.lastcinfo))
+        if self.has_cinfo:
+            out += f"    Installation description 1: {self.instdesc1}\n"
+            out += f"    Installation description 2: {self.instdesc2}\n"
+            out += f"    Manufacturer info: {self.manufinfo}\n"
+        else:
+            out += "    not available\n"
         return out

nmea2000/lookup.py

@@ -146,6 +146,7 @@ control = {
 deviceclass = {
     0: "Reserved for 2000 Use",
     10: "System tools",
+    11: "WEMA Custom?",
     20: "Safety systems",
     25: "Internetwork device",
     30: "Electrical Distribution",
@@ -169,6 +170,8 @@ devicefunction = { # dependent of deviceclass above
     10: {130: "Diagnostic",
          140: "Bus Traffic Logger"
         },
+    11: {150: "WEMA Fluid level" # Custom?
+        },
     20: {110: "Alarm Enunciator",
          130: "Emergency Positon Indicating Radia Beacon (EPIRB)",
          135: "Man Overboard",
@@ -485,7 +488,7 @@ manufacturer = {
     1861: "Vector Cantech",
     1862: "Yamaha Marine",
     1863: "Faria Instruments",
-    2001: "Open Boat Projects"
+    2046: "Open Boat Projects"
 }
 
 pilotmode = {

nmea2000/parser.py

@@ -5,8 +5,42 @@ PGNs verarbeiten
 '''
 
 import struct
+import time
+from datetime import timedelta, date
+from . import lookup
 
-def parse_126996(buf, source, device):
+def parse_60928(buf, device):
+    """
+    Sets data in device and returns the 64bit NAME of device
+    """
+    device.lastseen = time.time()
+    # 21 bits Unique-ID und 11 bits Manuf.-Code
+    device.uniqueid = ((buf[0] << 16) + (buf[1] << 8) + buf[2]) >> 3 
+    device.manufacturercode = (buf[3] * 256 + buf[2]) >> 5
+    device.instance = buf[4]
+    device.instlower = buf[4] & 0x07
+    device.instupper = buf[4] >> 3
+    device.devicefunction = buf[5]
+    device.deviceclass = (buf[6] & 0x7f) >> 1
+    device.industrygroup = (buf[7] >> 4) & 0x07  # 3bit
+    device.sysinstance = buf[7] & 0x0f           # 4bit
+    return struct.unpack_from('>Q', buf, 0)[0]
+
+def parse_126992(buf, source):
+    # System time
+    print(f"PGN 126992 System time from {source}")
+    sid = buf[0]
+    src = buf[1] & 0x0f
+    dval = date(1970,1,1) + timedelta(days=(buf[3] << 8) + buf[2])
+    secs = struct.unpack_from('<L', buf, 4)[0] * 0.0001
+    print(f"  source={source}, date={dval}, secs={secs}, ts={lookup.timesource[src]}")
+
+def parse_126993(buf, device):
+    # Heartbeat
+    print(f"Heartbeat from {device.address}")
+    print(buf)
+
+def parse_126996(buf, device):
     # Product information
     n2kvers = (buf[0] + buf[1] * 256) / 1000
     prodcode = buf[2] + buf[3] * 256
@@ -20,15 +54,15 @@ def parse_126996(buf, source, device):
     softvers = softvers.rstrip(b'\xff')
     modelvers = modelvers.rstrip(b'\xff')
     serial = serial.rstrip(b'\xff')
-    # Übertragen in die Geräteliste
+    # Übertragen in die Gerätedaten
-    devices[source].n2kvers = n2kvers
+    device.n2kvers = n2kvers
-    devices[source].productcode = prodcode
+    device.productcode = prodcode
-    devices[source].modelvers = modelvers.decode('ascii').rstrip()
+    device.modelvers = modelvers.decode('ascii').rstrip()
-    devices[source].softvers = softvers.decode('ascii').rstrip()
+    device.softvers = softvers.decode('ascii').rstrip()
-    devices[source].product = modelid.decode('ascii').rstrip()
+    device.product = modelid.decode('ascii').rstrip()
-    devices[source].serial = serial.decode('ascii').rstrip()
+    device.serial = serial.decode('ascii').rstrip()
-    devices[source].certlevel = buf[132]
+    device.certlevel = buf[132]
-    devices[source].loadequiv = buf[133]
+    device.loadequiv = buf[133]
 
 def parse_126998(buf, source, device):
     # Configuration information
@@ -68,9 +102,13 @@ def parse_127257(buf, boatdata):
 def parse_127505(buf, boatdata):
     # Fluid Level
     instance = buf[0] & 0x0f
-    boatdata.tank[instance].fluidtype = buf[0] >> 4
+    if instance in boatdata.tank:
-    boatdata.tank[instance].capacity = struct.unpack_from('<L', buf, 2)[0] * 0.1
+        boatdata.tank[instance].fluidtype = buf[0] >> 4
-    boatdata.tank[instance].volume = struct.unpack_from('<H', buf, 1)[0] * 0.004
+        boatdata.tank[instance].level = struct.unpack_from('<H', buf, 1)[0] * 0.004
+        boatdata.tank[instance].capacity = struct.unpack_from('<L', buf, 3)[0] * 0.1
+        print(boatdata.tank[instance])
+    else:
+        print(f"Tank {instance} not defined!")
 
 def parse_127508(buf, boatdata):
     # Battery status

obp60.conf

@@ -57,7 +57,7 @@ number_of_pages = 10
 start_page = 1
 
 [page1]
-type=Voltage
+type=ApparentWind
 
 [page2]
 type=Barograph

obp60.py

@@ -92,7 +92,7 @@ import pages
 import struct
 
 __author__ = "Thomas Hooge"
-__copyright__ = "Copyleft 2024, all rights reversed"
+__copyright__ = "Copyleft 2024-2025, all rights reversed"
 __version__ = "0.2"
 __email__ = "thomas@hoogi.de"
 __status__ = "Development"
@@ -101,6 +101,10 @@ cfg = {
     'cfgfile': 'obp60.conf',
     'imgpath': os.path.join(sys.path[0], 'images'),
     'deviceid': 100,
+    'manufcode': 2046,  # Open Boat Projects (OBP)
+    'devfunc': 120,     # Display
+    'devclass': 120,    # Display
+    'industrygroup': 4, # Marine
     'gps': False,
     'bme280': False
 }
@@ -495,7 +499,14 @@ if __name__ == "__main__":
     #setproctitle("obp60v")
 
     shutdown = False
+
     owndevice = Device(100)
+    # Hardcoding device, not intended to change
+    owndevice.manufacturercode = cfg['manufcode']
+    owndevice.industrygroup = cfg['industrygroup']
+    owndevice.deviceclass = cfg['devclass']
+    owndevice.devicefunction = cfg['devfunc']
+
     boatdata = BoatData()
     boatdata.addTank(0)
     boatdata.addEngine(0)

pages/apparentwind.py

@@ -1,3 +1,4 @@
+import os
 import cairo
 import math
 from .page import Page
@@ -6,11 +7,50 @@ class ApparentWind(Page):
 
     def __init__(self, pageno, cfg, boatdata):
         super().__init__(pageno, cfg, boatdata)
+        self.buttonlabel[1] = 'MODE'
+        self.mode = 'L' # (W)ind (L)ens
+        self.symbol = cairo.ImageSurface.create_from_png(os.path.join(cfg['imgpath'], "front.png"))
 
-    def draw(self, ctx):
+    def handle_key(self, buttonid):
+        if buttonid == 1:
+            if self.mode == 'W':
+                self.mode = 'L'
+            else:
+                self.mode = 'W'
+            return True
+        return False
+
+    def draw_wind(self, ctx):
         # Name
-        ctx.select_font_face("Ubuntu", cairo.FontSlant.NORMAL, cairo.FontWeight.BOLD)
+        ctx.set_font_size(40) 
-        ctx.set_font_size(60) 
         ctx.move_to(20, 100)
         ctx.show_text("Apparent Wind")
 
+    def draw_lens(self, ctx):
+        ctx.save()
+        ctx.set_source_surface(self.symbol, 140, 30)
+        ctx.paint()
+        ctx.restore()
+
+        ctx.set_line_width(2)
+
+        # Analoginstrument
+        cx = 200
+        cy = 150
+        r = 135
+        ctx.arc(cx, cy, r, math.radians(110), math.radians(250))
+        ctx.stroke()
+        ctx.arc(cx, cy, r, math.radians(-70), math.radians(70))
+        ctx.stroke()
+
+        # Windstärke als Digitalwert
+        ctx.select_font_face("DSEG7 Classic")
+        ctx.set_font_size(40)
+        self.draw_text_center(ctx, cx, cy + 80, "14.3", fix1=True)
+
+    def draw(self, ctx):
+        ctx.select_font_face("Ubuntu", cairo.FontSlant.NORMAL, cairo.FontWeight.BOLD)
+        if self.mode == 'W':
+            self.draw_wind(ctx)
+        else:
+            self.draw_lens(ctx)

pages/page.py

@@ -167,36 +167,67 @@ class Page():
         ctx.fill()
         ctx.set_source_rgb(0, 0, 0)
 
-    def draw_text_center(self, ctx, x, y, content, rotate=False, baseline=False, fill=False):
+    def draw_text_center(self, ctx, x, y, content, rotate=False, baseline=False, fill=False, fix1=False):
-        ext = ctx.text_extents(content)
+        """
+        Korrektur für DSEG7: Die Breite der 1 ist gleich 0.289 * Breite der anderen Ziffern
+        Da der Leerraum bei der Ausgabe mit berücksichtigt wird, muß die tatsächliche
+        Ausgabeposition links von der Mitte sein um (1 - 0.289) * Breite (=0.711)
+        Zusätzlich muß der Abstand zwischen der 1 und dem nachfolgenden Zeichen berücksichtigt
+        werden
+        """
+        if fix1 and content[0] == '1':
+            print("Fix1")
+            ext1 = ctx.text_extents('1')
+            w1 = 0.289 * ext1.width
+            dx = ext1.width - w1
+            ext = ctx.text_extents(content[1:])
+        else:
+            ext = ctx.text_extents(content)
         if fill:
             ctx.set_source_rgb(*self.bgcolor)
             xf = x + ext.x_bearing - 2
             yf = y + ext.height / 2 + ext.y_bearing - 2
             wf = ext.width + 4
+            if fix1:
+                wf += w1
             hf = ext.height + 4
             ctx.rectangle(xf, yf, wf, hf)
             ctx.fill()
         ctx.set_source_rgb(*self.fgcolor)
         if rotate:
+            w = ext[2]
+            if fix1 and content[0] == '1':
+                w += w1
+                x = x - dx
             if baseline:
-                ctx.move_to(x - ext[3] / 2.0, y)
+                ctx.move_to(x - w / 2.0, y)
             else:
-                ctx.move_to(x - ext[3] / 2.0, y + ext[2] / 2.0)
+                ctx.move_to(x - w / 2.0, y + ext[2] / 2.0)
             ctx.save()
             ctx.rotate(1.5 * math.pi)
             ctx.show_text(content)
             ctx.restore()
         else:
+            w = ext.width
+            if fix1 and content[0] == '1':
+                w += w1
+                x = x - dx
             if baseline:
-                ctx.move_to(x - ext[2] / 2.0, y)
+                ctx.move_to(x - w / 2.0, y)
             else:
-                ctx.move_to(x - ext[2] / 2.0, y + ext[3] / 2.0)
+                ctx.move_to(x - w / 2.0, y + ext[3] / 2.0)
             ctx.show_text(content)
         ctx.stroke()
 
-    def draw_text_ralign(self, ctx, x, y, content):
+    def draw_text_ralign(self, ctx, x, y, content, fix1=False):
-        ext = ctx.text_extents(content)
+        if fix1 and content[0] == '1':
-        ctx.move_to(x - ext[2], y)
+            w1 = ctx.text_extents('1')[2] * 0.289
+            ext = ctx.text_extents(content[1:])
+            w = ext[2] + w1
+            x = x - dx
+        else:
+            ext = ctx.text_extents(content)
+            w = ext[2]
+        ctx.move_to(x - w, y)
         ctx.show_text(content)
         ctx.stroke()