Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

4 Using FDEVICECONTROL

Many of the asynchronous device control functions that can be

performed through FCONTROL can be performed through

FDEVICECONTROL as well. In addition, FDEVICECONTROL allows

you to perform a number of device control functions that are not

available through use of FCONTROL. Chapter 3, “Common Device

Control Functions,” in this manual provides some practical examples of

how you can use FCONTROL in a program to control asynchronous

devices.

This chapter describes how you might use FDEVICECONTROL to

perform additional device control functions. It includes program

fragments to illustrate the use of the intrinsic. The text which

accompanies the examples will contrast the use of the

FDEVICECONTROL and FCONTROL.

Examples in this chapter illustrate using FDEVICECONTROL to

perform the following functions:

• Enable/disable transparent editing mode

• Specify a new end-of-record character.

• Change the backspace character and backspace response at a

terminal.

• Enable/Disable device XON/XOFF.

• Combine enable/disable escape sequence read termination function

with the enable/disable suppress echo of read termination characters

function.

• Specify the number of stop bits.

Refer to Chapter 8, “Intrinsics Reference,” for a complete summary of

the functions available through FDEVICECONTROL and for full

explanations of its syntax and parameter values.