TRACE32 - SNOOPer-based variable logging

In our daily debugging work, we often encounter a scenario: for some variables or memory values, we want to monitor them.

When these variables are written or read, these operations are recorded for subsequent statistical analysis or chart drawing.

In order to achieve the above functions, we can use the SNOOPer function provided by TRACE32.

The implementation of this function only requires the debug module of TRACE32, without any additional trace module.

SNOOPer function can record the changes of variables in real time during program execution, and has little effect on the normal execution of the program.

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Let's take a look at how to configure this function in TRACE32:

Select "Trace" from the TRACE32 menu bar,

Then select "Configuration",

Select SNOOPer as the tracking method.

The "SELect" field allows you to enter the address directly,

Or with the help of the select... button, the name of the variable to be recorded can be selected by mouse operation.

With the "i" symbol database, we will choose the variable plot1 as an example.

Then click the Go button to start the program.

The progress bar of the Trace window will continue to increase, indicating that SNOOPer is continuously collecting data.

After collecting for a period of time, you can click the Break button to stop the CPU.

Then click the List button in the Trace window to see the recorded data and time and other information.

In the upper window, click the Draw button,

The recorded variable values ​​can be displayed graphically.

Of course, the values ​​of multiple variables can also be recorded at the same time (up to 16 can be recorded).

In addition, the SNOOPer function can record other information, the most commonly used is the PC (Program Counter).