Agilent Technologies InfiniiVision 4000 X-Series, Programmer'S Manual

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1186 Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
38
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.
N O T E
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
Register.