Keil Logo

Technical Support

On-Line Manuals

µVision User's Guide

About µVision User Interface Creating Applications Debugging Start Debugging Start Energy Measurement without Debug Application Program Execution Debug Windows and Dialogs Breakpoints Window Call Stack and Locals Window Code Coverage Command Window Component Viewer Disassembly Window Editor Window Event Recorder Setup Event Recorder Event Recorder Window Events Filtering Event Statistics Window Post-mortem Analysis Event Viewer Execution Profiler Instruction Trace Window System Analyzer Usage tips Save System Analyzer Contents Statistics Restrictions Logic Analyzer Setup Setup in Detail Restrictions Cortex-M Trace Configuration Memory Map Memory Window Performance Analyzer Registers Window Serial Window Debug (printf) Viewer Symbols Window System Viewer Adding System Viewer Windows System and Thread Viewer Thread States Toolbox Trace Data Window Trace Navigation Trace Exceptions Event Counters ULINKplus Window Watch Window Core Peripherals Cortex-M0 and Cortex-M0+ Nested Vector Interrupt Controller System Control and Configuration System Tick Timer Fault Reports (Cortex-M0+ only) Cortex-M3, Cortex-M4, and Cortex-M7 Nested Vector Interrupt Controller System Control and Configuration System Tick Timer Fault Reports Memory Protection Unit Cortex-M23/M33/M35P and Cortex-M55 Nested Vector Interrupt Controller System Control and Configuration System Tick Timer Fault Reports Memory Protection Unit Security Attribution Unit M-Profile Vector Extension (MVE) Debug Scripting Expressions Constants System Variables Peripheral Variables I/O Ports Serial Ports Program Variables (Symbols) Fully Qualified Symbols Non-Qualified Symbols Literal Symbols Using Symbols Line Numbers Bit Addresses Type Specifications Memory Attribution Specifiers Operators Differences between µVision and C Expression Examples Code and Data Trace (Cortex-M) Trace Features Configuring Trace Tracepoint Expressions Tracepoint Intrinsics Tracepoint Limitations Tracepoint Marks Tips and Tricks Review Peripherals and CPU Configuration Simulate I/O Ports Simulate Interrupts and Clock Inputs Simulate external I/O Devices Assign Serial I/O to a PC COM Port Check Illegal Memory Access Command Input from File Preset I/O Ports or Memory Contents Write Debug Output to a File Keyboard Shortcuts TPIU Initialization after RESET (Cortex-M) Prevent Opening Files Show Japanese Messages Debug Commands Debug Functions Simulation Flash Programming Dialogs Utilities Command Line Example Programs Appendix


Many debug commands accept numeric expressions as parameters. A numeric expression is a number or a complex expression that contains numbers, debug objects, or operands. An expression can consist of any of the following components:

Component Description
Constants Constants are fixed numeric values or character strings.
System Variables System variables alter or affect the way µVision operates.
Peripheral Variables Peripheral register variables allow access to simulated on-chip peripherals.
Program Variables (Symbols) Program variables are the variables of your program. They are often called symbols or symbolic names.
Line Numbers Line numbers reference code addresses of executable programs. When you compile or assemble a program, the compiler and assembler include line number information in the generated object module.
Bit Addresses Bit addresses reference bit-addressable data memory.
Type Specifications Type specifications let you specify the data type of an expression or sub-expression.
Memory Attribution Specifiers Memory attribution specifiers are address extensions for explicit secure or non-secure accesses in debug commands.
Operators Operators include +, -, *, and /. Operators may be used to combine sub-expressions into a single expression. You may use all operators that are available in the C programming language.
Difference between µVision and C Differences to be aware of.
Expression Examples Code snippets explaining the usage of expressions you can enter in the Command Window.

Related Knowledgebase Articles

  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.