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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

Disassembly Window

The Disassembly Window shows the program execution in assembly code, or, intermixed with the source code (device dependent). When the Disassembly Window is the active window, then all debug-stepping commands work on assembly level.

Disassembly Window Button Open the window with the menu View — Disassembly Window.

  • Enable the trace history with View - Trace - Enable Trace Recording.
  • Use the Context Menu to access commands or set options quickly.
  • Set Breakpoints by clicking into the left (colored) margin.

Disassembly Window Example

The code execution markers identify:

No CodeNo Code - Lines with no code are marked with a light gray block.

Unexecuted CodeUnexecuted Code - Unexecuted lines (instructions) are marked with a dark gray block.

Fully Executed CodeExecuted Code - Fully-executed lines (instructions) are marked with a green block. A green block on a branch instruction indicates that both the true and false conditions have been tested.

Branch TakenBranch Condition True - A cyan (blue) block indicates that only this condition of a branch was true and therefore always taken.

Branch SkippedBranch Condition False - An orange block indicates that this condition of a branch was never true and therefore never taken.


  • Change the background color for the current line (yellow in the picture) with the dialog Edit - Configuration - Colors & Fonts - Disassembly Window - focus line background.
  • For further statistics refer to Code Coverage, Execution Profiler, and Performance Analyzer.
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