SIGNALWARE Corporation

Embedded Microprocessor Operating System (EMOS)

Real-time operating systems advertised for embedded systems are numerous. However, only some offer preemptive scheduling essential for real-time applications; and those tend to be big and expensive. EMOS is designed for real-time operation on small embedded processors at an affordable size and price.

Features

• Designed for Embedded Applications - Small Memory Requirement
• Preemptive Task Scheduling (immediate context switching for all interrupts)
• Dynamic Task Priority Control (change priority while running)
• User Written External Interrupt Routine Support
• Low Overhead Timed Event Activities (user written clock interrupt routines)
• Dynamic Scheduling of Timed Event Activities
• Based on Sceptre Standard

Description

• EMOS Block Diagram
• Task Management Function Descriptions
• Signal Management Function Descriptions
• Resource Management Function Descriptions
• Communication Management Function Descriptions
• Timer Management Function Descriptions
• Serial I/O Function Descriptions
• List of Functions Allowed Interrupt Handlers and Activities

Contents

• Task Management - start, stop, set priority, wait for signal
• Timer Management - real-time clock, event/activity scheduling
• Queue Management - inter-task FIFO queues
• Serial Communication - putchar, getchar, simplified printf
• Resource Management - lock, unlock
• Sample Programs - test code, examples of use

Supported Processors - Parameters

• Intel 8051 Series
  • Tasks and Signals per Task - 8
  • Queue Lengths - up to 122 bytes

• Texas Instruments TMS320C5x
  • Tasks and Signals per Task - 16
  • Queue Lengths - limited by available memory

Availability - Supported Compilers

• Intel 8051 Series / MICRO/C-51 (Micro Computer Control) - Now Available
• Texas Instruments TMS320C5x / Optimizing C Compiler - June 1998

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