External Interfaces/API    

Using Control Pins

As described in Serial Port Signals and Pin Assignments, 9-pin serial ports include six control pins. These control pins allow you to:

The properties associated with the serial port control pins are given below.

Table 8-11: Control Pin Properties 
Property Name
Description
DataTerminalReady
Specify the state of the DTR pin
FlowControl
Specify the data flow control method to use
PinStatus
Indicate the state of the CD, CTS, DSR, and RI pins
RequestToSend
Specify the state of the RTS pin


  Example: Using Events and Callbacks Signaling the Presence of Connected Devices