Automation Reference - JMP

Application Object Reference for Automating JMP
DataFeed Object
DataFeed Object
The DataFeed object provides a way to read data from a serial port. This allows a user to hook up an instrument, read
the values through JMP, and use them in the automation client program.
Methods
Close() As Boolean
Closes the connection to the port, cleans up the information about the port and tells JMP that this data feed
object is closed. Any further attempt to use this data feed object will fail. A return value of True indicates
success, False indicates Failure.
Connect(PortName As String) As Boolean
Attempts to establish a connection to the named port using the parameters that have either been previously
specified in SetCommParms or in JMP. Returns True if successful, False otherwise. An example of a valid port
name is COM1.
Disconnect() As Boolean
Disconnects from the port associated with this datafeed, but keeps the port information for use in a later
Connect(PortName As String) As Boolean. A return value of True indicates success.
GetLine() As String
Reads a data element from a port and returns the value as a string.
SetCommParms(BSTR szCommPort, long baudrate, short parity, short databits, short stopbits, short flow)
As Boolean
Set up the parameters for a serial port. If zero is specified for a particular value, then the values specified in JMP
Preferences are used. If no preferences have been set, a default value is used. The szCommPort parameter is
mandatory. Returns True if successful, False otherwise. An example of a valid port name is COM1. Values for
parity should be obtained from the commParityConstants enumeration. Values for flow control can be a logical
Or operation of any of the values from the commFlowControlConstants enumeration, or can be 0 for no flow
control.
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