Measurement-computing Analyzer488 Manual do Utilizador descarregar pdf (Página 232)

Section 6 Instrument Simulator

6.22

Serial Poll Response Sn

The Serial Poll Response command,

, is used to set the eight-bit serial poll

when the IEEE controller issues a serial poll command (SPOLL) on the bus. All data

sent to the serial poll register replaces any previous register data. If the seventh data

line is set true (x1xxxxxx), the Analyzer488 will assert the Service Request (SRQ) bus

line. After the Analyzer488 is serial polled, bit 7 of the serial poll response register

will be cleared.

SYNTAX:

Clear the serial poll register (default)

Set the serial poll register to

= 0 to 255

(new data replaces any previous data)

Returns current Serial Poll register contents

EXAMPLES:

PRINT#1,"OUTPUT10;S65X"

set the serial poll register to 65, the

Analyzer488 will generate an SRQ

PRINT#1,"SPOLL10"

serial poll the Analyzer488

INPUT#2,C$

PRINT C$ display shows 65

PRINT#1,"SPOLL10"

serial poll the Analyzer488 again

INPUT#2,C$

PRINT C$ display shows 1 since the

Analyzer488 was Serial Polled

above which cleared bit 7

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Measurement-computing Analyzer488 Manual do Utilizador Página 232