hardwareInterface integrated into Pev

fsmPev.py

@@ -204,8 +204,8 @@ class fsmPev():
                 # (B) The charger finished to tell the charge parameters.
                 if (strConverterResult.find('"EVSEProcessing": "Finished"')>0):                
                     self.addToTrace("It is Finished. Will change to state C and send CableCheckReq.")
-                    # todo: pull the CP line to state C here.
+                    # pull the CP line to state C here:
-                    # self.hardwareInterface.changeToStateC()
+                    self.hardwareInterface.setStateC()
                     msg = addV2GTPHeader(exiEncode("EDF_"+self.sessionId)) # EDF for Encode, Din, CableCheck
                     self.addToTrace("responding " + prettyHexMessage(msg))
                     self.Tcp.transmit(msg)
@@ -320,15 +320,17 @@ class fsmPev():
     def reInit(self):
         self.addToTrace("re-initializing fsmPev") 
         self.Tcp.disconnect()
+        self.hardwareInterface.setStateB()
         self.state = stateConnecting
         self.cyclesInState = 0
         self.rxData = []
         
-    def __init__(self, addressManager, callbackAddToTrace):
+    def __init__(self, addressManager, callbackAddToTrace, hardwareInterface):
         self.callbackAddToTrace = callbackAddToTrace
         self.addToTrace("initializing fsmPev") 
         self.Tcp = pyPlcTcpSocket.pyPlcTcpClientSocket(self.callbackAddToTrace)
         self.addressManager = addressManager
+        self.hardwareInterface = hardwareInterface
         self.state = stateNotYetInitialized
         self.sessionId = "DEAD55AADEAD55AA"
         self.cyclesInState = 0

hardwareInterface.py

@@ -10,24 +10,75 @@ import serial # the pyserial
 from serial.tools.list_ports import comports
 from time import sleep
 
+class hardwareInterface():
+    def findSerialPort(self):
+        ports = []
+        self.addToTrace('Available serial ports:')
+        for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
+            self.addToTrace('{:2}: {:20} {!r}'.format(n, port, desc))
+            ports.append(port)
+        if (len(ports)<1):
+            self.addToTrace("ERROR: No serial ports found. No hardware interaction possible.")
+            self.ser = None
+            self.isInterfaceOk = False
+        else:
+            self.addToTrace("ok, we take the first port, " + ports[0])
+            try:
+                self.ser = serial.Serial(ports[0], 19200, timeout=0)
+                self.isInterfaceOk = True
+            except:
+                self.addToTrace("ERROR: Could not open serial port.")
+                self.ser = None
+                self.isInterfaceOk = False
+
+    def addToTrace(self, s):
+        self.callbackAddToTrace("[HARDWAREINTERFACE] " + s)            
+
+    def setStateB(self):
+        self.addToTrace("Setting CP line into state B.")
+        self.outvalue = 0
+        
+    def setStateC(self):
+        self.addToTrace("Setting CP line into state C.")
+        self.outvalue = 1
+        
+    def __init__(self, callbackAddToTrace=None):
+        self.callbackAddToTrace = callbackAddToTrace
+        self.loopcounter = 0
+        self.outvalue = 0
+        self.findSerialPort()
+
+    def close(self):
+        if (self.isInterfaceOk):        
+            self.ser.close()
+    
+    def mainfunction(self):
+        self.loopcounter+=1
+        if (self.isInterfaceOk):
+            if (self.loopcounter>15):
+                self.loopcounter=0
+                # self.ser.write(b'hello world\n')
+                self.ser.write(bytes("out"+str(self.outvalue)+"\n", "utf-8"))
+            s = self.ser.read(100)
+            if (len(s)>0):
+                self.addToTrace(str(len(s)) + " bytes received: " + str(s, 'utf-8').strip())
+        
+def myPrintfunction(s):
+    print("myprint " + s)
+
 if __name__ == "__main__":
-    nFail=0
     print("Testing hardwareInterface...")
-    print('Available ports:')
+    hw = hardwareInterface(myPrintfunction)
-    ports = []
+    for i in range(0, 300):
-    for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
+        hw.mainfunction()
-        print('{:2}: {:20} {!r}'.format(n, port, desc))
+        if (i==100):
-        ports.append(port)
+            hw.setStateC()
-    if (len(ports)<1):
+        if (i==200):
-        print("no ports, we cannot test anything.")
+            hw.setStateB()
-        exit()
+        if (i==250):
-    print("ok, we take the first port, " + ports[0])
+            hw.setStateC()
-    ser = serial.Serial(ports[0], 19200, timeout=0)
+        if (i==280):
-    for i in range(0, 5):
+            hw.setStateB()
-        ser.write(b'hello world\n')
+        sleep(0.03)
-        sleep(0.5)
+    hw.close()    
-        s = ser.read(100)
-        if (len(s)>0):
-            print(str(len(s)) + " bytes received: " + str(s, 'utf-8'))
-    ser.close()
     print("finished.")

pyPlcWorker.py

@@ -13,6 +13,7 @@ from pyPlcModes import *
 import addressManager
 import time
 import subprocess
+import hardwareInterface
         
 
 class pyPlcWorker():
@@ -28,6 +29,7 @@ class pyPlcWorker():
         self.oldAvlnStatus = 0
         self.isSimulationMode = isSimulationMode
         self.hp = pyPlcHomeplug.pyPlcHomeplug(self.workerAddToTrace, self.callbackShowStatus, self.mode, self.addressManager, self.callbackReadyForTcp, self.isSimulationMode)
+        self.hardwareInterface = hardwareInterface.hardwareInterface(self.workerAddToTrace)
         self.hp.printToUdp("pyPlcWorker init")
         # Find out the version number, using git.
         # see https://stackoverflow.com/questions/14989858/get-the-current-git-hash-in-a-python-script
@@ -39,7 +41,7 @@ class pyPlcWorker():
         if (self.mode == C_EVSE_MODE):
             self.evse = fsmEvse.fsmEvse(self.workerAddToTrace)
         if (self.mode == C_PEV_MODE):
-            self.pev = fsmPev.fsmPev(self.addressManager, self.workerAddToTrace)
+            self.pev = fsmPev.fsmPev(self.addressManager, self.workerAddToTrace, self.hardwareInterface)
  
     def workerAddToTrace(self, s):
         # The central logging function. All logging messages from the different parts of the project
@@ -69,7 +71,8 @@ class pyPlcWorker():
     def mainfunction(self):
         self.nMainFunctionCalls+=1
         #self.showStatus("pyPlcWorker loop " + str(self.nMainFunctionCalls))
-        self.hp.mainfunction() # call the lower-level worker
+        self.hp.mainfunction() # call the lower-level workers
+        self.hardwareInterface.mainfunction()
         if (self.mode == C_EVSE_MODE):
             self.evse.mainfunction() # call the evse state machine
         if (self.mode == C_PEV_MODE):
@@ -86,7 +89,7 @@ class pyPlcWorker():
             self.hp.enterPevMode()
             if (not hasattr(self, 'pev')):
                 print("creating pev")
-                self.pev = fsmPev.fsmPev(self.addressManager, self.workerAddToTrace)
+                self.pev = fsmPev.fsmPev(self.addressManager, self.workerAddToTrace, self.hardwareInterface)
             self.pev.reInit()
         if (strAction == "E"):
             print("switching to EVSE mode")