HP 132A, 53131A Determining the Condition of the Counter, How to Program the Counter for Status Reporting, Resetting the Counter and Clearing the HP-IBInterface— Example

Chapter 3 Programming Your Universal Counter for Remote Operation

How to Program the Counter for Status Reporting

How to Program the Counter for Status Reporting

Determining the Condition of the Counter

The Counter has status registers that are used to indicate its condition. There are four register groups that can be examined individually, or used to alert a computer. These registers, shown in Figure 3-6, are:

∙Operation Status Register Group

∙Questionable Data/Signal Register Group

∙Standard Event Status Register Group

∙Status Byte Register Group

The first three groups all have event registers that can be fed into the Status Byte Register. The Status Byte Register can be used to assert the SRQ line of the HP- IB and thus alert the computer that the Counter needs attention. The following examples show how each of the register groups can be used. (Figure 3-10 is a flowchart diagram of how to program the Counter for Status Reporting.)

Resetting the Counter and Clearing the HP-IB Interface— Example 1

Before attempting any programming, it is a good idea to set the Counter to a known state . The following command grouping shows how to reset the Counter. Before issuing these commands, execute a device clear to reset the interface and Counter. Consult your interface card ’s documentation for how to issue a device clear since the device clear command will be specific to the interface you are using. Perform the following:

1.Issue a Device Clear (See your computer or interface card documentation for how to issue this command).

2.Issue the following commands:

*RST

*CLS *SRE 0 *ESE 0 :STAT:PRES

3-38 Programming Guide