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Cx51 User's Guide
Cx51 Introduction Compiling Programs Language Extensions
Keywords Memory Areas Program Memory Internal Data Memory External Data Memory Far Memory SFR Memory Memory Models Small Model Compact Model Large Model Memory Types bdata code data far idata pdata xdata Data Types Special Function Registers sfr sfr16 sbit Bit-Addressable Objects bit Standard C Types void char int enum float double Type Modifiers signed unsigned short long Type Qualifiers const volatile Storage Classes auto register extern static Absolute Variable Location Pointers Generic Pointers Memory-Specific Pointers Pointer Conversions Abstract Pointers Function Declarations Parameters and the Stack Parameters and Registers Return Values Memory Models Register Banks Register Bank Access Interrupt Functions Reentrant Functions Alien (PL/M-51) Function Real-Time Function Tasks Preprocessor Advanced Programming 8051 Derivatives Error Messages Library Reference AppendixReal-Time Function Tasks
The Cx51 Compiler supports the RTX51 Full and RTX51 Tiny real-time multitasking operating systems with the _task_ and _priority_ keywords.
- The _task_ keyword specifies a function is a real-time task.
- The _priority_ keyword specifies the priority for the task.
For example:
void func (void) _task_ num _priority_ pri
Where
| num | is a task ID number from 0-255 for RTX51 Full or 0-15 for RTX51 Tiny. |
| pri | is the priority for the task. Refer to the RTX51 User's Guide or the RTX51 Tiny User's Guide for more information. |
Note
- Task functions must be declared with a void return type and a void argument list.
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