Measurement-computing Serial488/4 Manuel d'utilisateur télécharger pdf (Page 53)

Section 3 Command Descriptions

3.14

Handshake Control Nn

The Handshake Control, in conjunction w ith the Handshake Type command,

determines what flow control method is to be used in serial data transfers for the

selected port. The Port Select command (

) is used to select the serial port

regardless of addressing mode in use. If the hardw are handshake method (

) is

being used, the handshake control command w ill effect the serial port's

RTS

line.

Handshaking control may be selected to asserted and un-asserted the

RTS

line

automatically as memory is available, asserted the

RTS

line continually or un-

asserted

RTS

line continually.

When the softw are handshake method (

) is used, the handshake control

command will effect the sending of the handshake characters

XON

and

XOFF.

Handshaking control may be selected to enable the automatic output of

XON/XOFF

serial characters as memory dictates, cause the

XOFF

character to be issued, or cause

the

XON

character to be issued. Additionally this command may be used to enable

the output of sixteen times the baud rate clock on the

RTS

line.

If the no handshake method (

) is in use, the H andshake Control command

controls the assertion, un-assertion, or output of a signal sixteen times baud clock

output on the

RTS

line.

The factory default setting as set by the Save Configuration command (

) is

, automatic handshaking.

Automatic handshaking,

RTS/CTS

XON/XOFF.

N1 Hold off serial input, un-assert

RTS

or send

XOFF

Release holdoff of serial input, assert

RTS

, or send

XON

Automatic

XON/XOFF

handshake with 16 x baud clock output on

RTS

line, or no handshaking and 16 x baud clock output on

RTS

line.

Return present handshaking control selection.

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Measurement-computing Serial488/4 Manuel d'utilisateur Page 53

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