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IAR Embedded Workbench for RISC-V 3.40

Quick Watch window

In this section:

What do you want to do?

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The Quick Watch window is available from the View menu and from the context menu in the editor window.

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Use this window to watch the value of a variable or expression and evaluate expressions at a specific point in time.

In contrast to the Watch window, the Quick Watch window gives you precise control over when to evaluate the expression. For single variables this might not be necessary, but for expressions with possible side effects, such as assignments and C-SPY macro functions, it allows you to perform evaluations under controlled conditions.

To evaluate an expression:

  1. In the editor window, right-click on the expression you want to examine and choose Quick Watch from the context menu that appears.

  2. The expression will automatically appear in the Quick Watch window.

    Alternatively:

  3. In the Quick Watch window, type the expression you want to examine in the Expressions text box.

  4. ClickRELOADButton.png the Recalculate button to calculate the value of the expression.

    For an example, see Using C-SPY macros.

Requirements

Can be used with all C-SPY debugger drivers and debug probes.

Display area

This area contains these columns:

Expression

The name of the variable.

A name in square brackets, for example [fieldname], is either the name of a base class for a struct/class object or—if shown in gray and italic)—a pointer to the full object when of a class type derived from the original class.

Value

The value of the variable. Values that have changed are highlighted in red.

Dragging text or a variable from another window and dropping it on the Value column will assign a new value to the variable in that row.

This column is editable.

Location

The location in memory where this variable is stored.

Type

The data type of the variable.

Context menu

This context menu is available:

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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:

Remove

Removes the selected expression from the window.

Remove All

Removes all expressions listed in the window.

Default Format, Binary Format, Octal Format, Decimal Format, Hexadecimal Format, Char Format

Changes the display format of expressions. The display format setting affects different types of expressions in different ways. Your selection of display format is saved between debug sessions. These commands are available if a selected line in the window contains a variable.

The display format setting affects different types of expressions in these ways:

Variables

The display setting affects only the selected variable, not other variables.

Array elements

The display setting affects the complete array, that is, the same display format is used for each array element.

Structure fields

All elements with the same definition—the same field name and C declaration type—are affected by the display setting.

Show As

Displays a submenu that provides commands for changing the default type interpretation of variables. The commands on this submenu are mainly useful for assembler variables—data at assembler labels—because these are, by default, displayed as integers.For more information, see Viewing assembler variables.

Save to File

Saves content to a file in a tab-separated format.

Right Align ‘Value’ Column

Right-aligns the contents of the Value column.

Options

Displays the IDE Options dialog box where you can set various options for C-SPY windows.