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Technical Support
On-Line Manuals
µVision User's Guide
About µVision
User Interface
Creating Applications
Utilities
Debugging
Using the Debugger
Simulation
Start Debugging
Application Program Execution
Debug Windows and Dialogs
Breakpoints Window
Call Stack and Locals Window
Code Coverage
Command Window
Disassembly Window
Event Viewer
Logic Analyzer
Setup
Setup in Detail
Restrictions
Memory Map
Memory Window
Performance Analyzer
Registers Window
Serial Window
Symbols Window
System Viewer
System and Thread Viewer
Thread States
Toolbox
Watch Window
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
Operators
Memory Type Specifiers
Differences between µVision and C
Expression Examples
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
Prevent Opening Files
Debug Commands
Debug Functions
Simulation
Flash Programming
Dialogs
Example Programs
Command Line
Appendix
Expressions
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. |
| 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. |
| Memory Type Specifiers | Memory type specifiers that can be used with debugging commands in 80x51 microcontrollers. |
| 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. |
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