Filter
Top Products
i
Contents
Chapter 1 User’s Manual Organization .................................................................................................... - 1 -
Chapter 2 General Information .................................................................................................................- 3 -
2.1 Objective of MR308 Development...................................................................................................... - 4 -
2.2 Relationship between TRON Specification and MR308................................................................... - 6 -
2.3 MR308 Features ................................................................................................................................. - 7 -
Chapter 3 Introduction to MR308..............................................................................................................- 9 -
3.1 Concept of Real-time OS .................................................................................................................. - 10 -
3.1.1 Why Real-time OS is Necessary ............................................................................................... - 10 -
3.1.2 Operating Principles of Real-time OS......................................................................................- 13 -
3.2 Service Call ....................................................................................................................................... - 16 -
3.2.1 Service Call Processing ............................................................................................................. - 17 -
3.2.2 Task Designation in Service call .............................................................................................. - 18 -
3.3 Task ................................................................................................................................................... - 19 -
3.3.1 Task Status ................................................................................................................................- 19 -
3.3.2 Task Priority and Ready Queue ............................................................................................... - 23 -
3.3.3 Task Priority and Waiting Queue............................................................................................. - 24 -
3.3.4 Task Control Block(TCB) .......................................................................................................... - 25 -
3.4 System States.................................................................................................................................... - 27 -
3.4.1 Task Context and Non-task Context........................................................................................ - 27 -
3.4.2 Dispatch Enabled/Disabled States ...........................................................................................- 28 -
3.4.3 CPU Locked/Unlocked States................................................................................................... - 29 -
3.4.4 Dispatch Disabled and CPU Locked States............................................................................. - 29 -
3.5 MR308 Kernel Structure.................................................................................................................. - 30 -
3.5.1 Module Structure....................................................................................................................... - 30 -
3.5.2 Module Overview....................................................................................................................... - 31 -
3.5.3 Task Management Function .....................................................................................................- 32 -
3.5.4 Synchronization functions attached to task ............................................................................ - 34 -
3.5.5 Synchronization and Communication Function (Semaphore)................................................ - 37 -
3.5.6 Synchronization and Communication Function (Eventflag) .................................................. - 39 -
3.5.7 Synchronization and Communication Function (Data Queue) .............................................. - 41 -
3.5.8 Synchronization and Communication Function (Mailbox)..................................................... - 42 -
3.5.9 Memory pool Management Function .......................................................................................- 44 -
Fixed-size Memory pool Management Function ................................................................................................. - 44 -
Variable-size Memory Pool Management Function............................................................................................. - 45 -
3.5.10 Time Management Function..................................................................................................... - 47 -
3.5.11 Cyclic Handler Function ........................................................................................................... - 49 -
3.5.12 Alarm Handler Function...........................................................................................................- 50 -
3.5.13 System Status Management Function..................................................................................... - 51 -
3.5.14 Interrupt Management Function ............................................................................................. - 52 -
3.5.15 System Configuration Management Function ........................................................................- 53 -
3.5.16 Extended Function (Short Data Queue) .................................................................................. - 53 -
3.5.17 Extended Function (Reset Function) ....................................................................................... - 54 -
3.5.18 Service calls That Can Be Issued from Task and Handler..................................................... - 55 -
Chapter 4 Applications Development Procedure Overview.................................................................... - 59 -
4.1 Overview............................................................................................................................................ - 60 -