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IAR Embedded Workbench for RISC-V 3.40

Timeline window—Data Log graph

In this section:

What do you want to do?

YellowStripe.png

The Timeline window is available from the C-SPY driver menu during a debug session.

TimelineDataLogGraph_Mym80_04.png

This window displays trace data represented as different graphs, in relation to a shared time axis.

The Data Log graph displays the data logs collected by the trace system, for up to four different variables or address ranges specified as Data Log breakpoints.

Note

There is a limit on the number of saved logs. When this limit is exceeded, the oldest entries in the buffer are erased.

Display area for the Data Log graph

Where:

  • The label area at the left end of the graph displays the variable name or the address for which you have specified the Data Log breakpoint.

  • The graph itself displays how the value of the variable changes over time. The label area also displays the limits, or range, of the Y-axis for a variable. You can use the context menu to change these limits. The graph is a graphical representation of the information in the Data Log window, see Data Log window.

  • The graph can be displayed either as a thin line between consecutive logs or as a rectangle for every log (optionally color-filled).

  • A red vertical line indicates overflow, which means that the communication channel failed to transmit all data logs from the target system. A red question mark indicates a log without a value.

At the bottom of the window, there is a shared time axis that uses seconds or cycles as the time unit.

Context menu

This context menu is available:

DataLogGraphPopUp_1.png

Note

The contents of this menu are dynamic and depend on which features that your combination of software and hardware supports. However, the list of menu commands below is complete and covers all possible commands.

These commands are available:

Navigate

Commands for navigating the graph(s). Choose between:

Next moves the selection to the next relevant point in the graph. Shortcut key: right arrow.

Previous moves the selection backward to the previous relevant point in the graph. Shortcut key: left arrow.

First moves the selection to the first data entry in the graph. Shortcut key: Home.

Last moves the selection to the last data entry in the graph. Shortcut key: End.

End moves the selection to the last data in any displayed graph, in other words the end of the time axis. Shortcut key: Ctrl+End.

Auto Scroll

Toggles automatic scrolling on or off. When on, the most recently collected data is automatically displayed when you choose Navigate>End.

Zoom

Commands for zooming the window, in other words, changing the time scale. Choose between:

Zoom to Selection makes the current selection fit the window. Shortcut key: Return.

Zoom In zooms in on the time scale. Shortcut key: +

Zoom Out zooms out on the time scale. Shortcut key: –

10ns, 100ns, 1us, etc makes an interval of 10 nanoseconds, 100 nanoseconds, 1 microsecond, respectively, fit the window.

1ms, 10ms, etc makes an interval of 1 millisecond or 10 milliseconds, respectively, fit the window.

10m, 1h, etc makes an interval of 10 minutes or 1 hour, respectively, fit the window.

Data Log

A heading that shows that the Data Log-specific commands below are available.

Enable

Toggles the display of the graph on or off. If you disable a graph, that graph will be indicated as OFF in the window. If no data has been collected for a graph, no data will appear instead of the graph.

Clear

Deletes the log information. Note that this will also happen when you reset the debugger.

Variable

The name of the variable for which the Data Log-specific commands below apply. This menu command is context-sensitive, which means it reflects the Data Log graph you selected in the Timeline window (one of up to four).

Viewing Range

Displays a dialog box, see Viewing Range dialog box.

Size

Determines the vertical size of the graph—choose between Small, Medium, and Large.

Solid Graph

Displays the graph as a color-filled solid graph instead of as a thin line.

Show Numerical Value

Shows the numerical value of the variable, in addition to the graph.

Hexadecimal

Toggles between displaying the selected value in decimal or hexadecimal format. Note that this setting also affects the log window.

Go To Source

Displays the corresponding source code in an editor window, if applicable.

Select Graphs

Selects which graphs to be displayed in the Timeline window.

Time Axis Unit

Selects the unit used in the time axis—choose between Seconds and Cycles.

If Cycles is not available, the graphs are based on different clock sources. In that case you can view cycle values as tooltip information by pointing at the graph with your mouse pointer.