Agilent Technologies 2000 X-Series Servisní příručka stáhnout pdf (Strana 770)

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770 Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide

35 Status Reporting

(Standard) Event Status Enable Register (ESE)

To allow any of the (Standard) Event Status Register (ESR) bits to

generate a summary bit, you must first enable that bit. Enable the bit by

using the *ESE (Event Status Enable) common command to set the

corresponding bit in the (Standard) Event Status Enable Register (ESE).

Set bits are read with the *ESE? query.

Example Suppose your application requires an interrupt whenever any type of error

occurs. The error related bits in the (Standard) Event Status Register are

bits 2 through 5 (hexadecimal value 0x3C). Therefore, you can enable any

of these bits to generate the summary bit by sending:

myScope.WriteString "*ESE " + CStr(CInt("&H3C"))

Whenever an error occurs, it sets one of these bits in the (Standard) Event

Status Register. Because all the error related bits are enabled, a summary

bit is generated to set bit 5 (ESB) in the Status Byte Register.

If bit 5 (ESB) in the Status Byte Register is enabled (via the *SRE

command), an SRQ service request interrupt is sent to the controller PC.

NOTE

Disabled (Standard) Event Status Register bits respond but do not generate a summary

bit. (Standard) Event Status Register bits that are not enabled still respond to their

corresponding conditions (that is, they are set if the corresponding event occurs). However,

because they are not enabled, they do not generate a summary bit to the Status Byte

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