# Dynamicaly changes data of message from Send Tab

# Message from Send tab is sent to virtual channel
# The Python code reads the message, changes it, and sends it on a real channel
# One bit in the message is toggled for every other message

togglebit = 0

# Function handling incoming signals
def recvFunc(canmsg):
    # Create a global variable
    global togglebit

    # Toggle bit for specific channel
    if (canmsg.Channel == 2 and canmsg.Id == 52):
        original = canmsg.Data[:]
        if togglebit == 0:
            togglebit = 1
            canmsg.Data[3] = 128 # Changes one bit in data
        else:
            togglebit = 0
        
        ctapi.Send(1, canmsg) # Sends toggled data to channel 1
        
        canmsg.Data = original # Returns original msg back to original state
    return True