Overview

This product is a real-time operating system (real-time OS) that is an implementation of the μITRON4.0 specification. μITRON is the predominant real-time OS for embedded systems in Japan. Its low resource requirements, outstanding real-time performance, and broad range of service calls make it very suitable for embedded systems requiring true real-time and multi-tasking capabilities.

In addition, its high degree of compatibility with the compiler package from Renesas Electronics and multitasking debugging on the IDE will help you greatly reduce development times and get your products to market more quickly.

Screen Image: Configurator
Screen Image : Debugging Extension
Image: Cooperation with 3rd parties
Screen Image: Configurator
Screen Image : Debugging Extension
Image: Cooperation with 3rd parties
  • Conformance with the µITRON4.0 Specification
    The design conforms with the µITRON4.0 Specification, which prescribes a representative OS architecture for embedded control.
  • Real-time performance
    Task switching time is 1.8μsec, which is even faster than the previous product.Time it takes a target task to be activated after a wup_tsk is issued. (SH7729R@167MHz, at time of cache hit) [Learn More]
  • Superb functionality
    Supports more than 100 service calls, such as the dynamic task generation system call.They support various applications.[Learn More]
  • Configurator
    The configurator is equipped which makes the setup of OS construction parameters easier.[Learn More]
  • Supports the multi-task functionality in High-performance Embedded Workshop
    The Debugging Extension is an optional software which supports the following functions:[Learn More]：
    • Displaying the states of OS control objects such as tasks, semaphores, etc.
    • Issues the service calls for task activation and event flag setting etc.
    • Graphically-displayed service call history
  • Cooperation with 3rd parties
    We provide various solutions to deliver great environments for debugger/application software development, distribution of middleware, customization, and hardware platform etc. in conjunction with our partner vendors.
  • Target CPU: SuperH RISC engine Family SH-3、SH3-DSP、SH4AL-DSP (MMU (Memory Management Unit) is not supported.)
  • Supported compiler: C/C++ Compiler Package for SuperH Family
  • Learn More

Latest Ver.: V.2.03 Release 01
Released: Nov 01, 2011
Details of upgrade (See Tool News)
Operating Environment
Agreement Details

Downloads

Documentation

Additional Details

Supported CPU Cores

SH-3, SH3-DSP, SH4AL-DSP
*MMU (Memory Management Unit) is not supported.

Kernel specifications

Specifications/Functions: Supports the following functions including uITRON4.0 spec-compliant standard profile.
・Service calls for dynamic object creation(cre_???, acre_???) and deletion(del_???)
・Mutex (TA_CEIL attribute only)
・Message buffer
・Variable-length memory pool
・Alarm handler
・Over handler
The following are the Renesas-specific functions
・Task-attached event flag
・Cache support function
Scheduling types: Priority basis type / Event-driven type
Target CPU: SH-3, SH3-DSP, SH4AL-DSP
*MMU is not supported.
Service call number: 152
(Count xxx_yyy plus ixxx_yyy as one)
Maximum object number: 1023 (Only the cycle handler and the alarm handler have 15 each)
A maximum value can be selected with the configurator
Maximum Priority number: 255, A maximum value can be selected with the configurator
Application operating mode: All application programs are operated in privileged mode
Performance
(Time takes for a target task to be executed after the wup_tas is issued.):		 1.3 microseconds (SH73180, 216MHz, cache enabled)
Kernel code size: From 7.5K bytes to 46K bytes
Kernel RAM usage per task: Data: 64 bytes
Stack: 184 bytes

Components

Provided items Explanation Note
Kernel source program Kernel source program Provided only with mass- production licenses which include source code.
Kernel library Kernel library for system building
Kernel library for DSP support
DSP standby control function library
Optimaized timer function library
Cache support library		 Compliant with big/little endian
Standard header files ITRON specification common definition files
Kernel specification definition files
Other definition files		 Header files are provided both in Assembler and C language
Configurator To configure a construction parameter —
Various sample programs CPU initialization routine assembler source
CPU initialization routine C source
Exception enter/exit processing assembler source
Section initialization processing C source
Section information definition file
Undefined interrupt detailed information acquisition process source
System down routine source
Timer driver source		 —
Workspace for construction HEW workspace for system building
Project file for separate linkage
Project file for whole linkage		 —
Manual HI7000/4series user's manual —

Processing Flow

hi7700-4-flow-e