 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs Language Extensions
Keywords Memory Models Tiny Model Small Model Medium Model Compact Model Large Model HCompact Model HLarge Model XLarge Model Memory Types near far bdata ebdata idata sdata huge xhuge Memory Type Comparison Pointers with Memory Types Implicit Memory Types Type Qualifiers const volatile Data Types Special Function Registers sfr Types sbit Types bit Types Bit-Addressable Objects Function Declarations Return Values Register Bank Register Mask Interrupt Functions Fast Interrupts Cached Vectors Fast Register Banks Inline Functions Real-Time Function Tasks Inline Assembly Traditional Inline Assembly Extended Inline Assembly Register Use Use in Macro Definitions Preprocessor Advanced Programming Error Messages Library Reference AppendixFunction Declarations
The C166 Compiler provides a number of extensions for standard C function declarations. These extensions allow you to:
- Declare a function as an interrupt procedure.
- Choose the register bank used.
- Select the memory area where the function is stored.
- Declare a function as a real-time task function.
You may include these extensions or attributes (many of which may be combined) in the function declaration. Use the following standard format for your C166 Compiler function declarations.
« type » funcname (« args ») « interrupt vector » « using bankname »
Where
| type | is the type of the value returned from the function. If no type is specified, int is assumed. |
| funcname | is the name of the function. |
| args | is the argument list for the function. |
| interrupt | indicates that the function is an interrupt function. |
| vector | is the interrupt vector name or trap number. |
| using | specifies which register bank the function uses. |
| bankname | is the register bank name. |
Descriptions of these attributes and other features are described in detail in the following sections.
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