Overview
Description
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.
The H8SX family supports interrupt control mode 2.0 and CPU operating mode supports advanced mode. The H8S family supports interrupt control mode 3.2.1.0 and CPU operation mode supports advanced mode and normal mode.
Features
- 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 7.4μsec, which is even faster than the previous product. Time it takes a target task to be activated after a wup_tsk is issued. (H8SX/1650@35MHz, when on-chip memory is used) [Learn More] - Superb functionality
Supports more than 70 service calls.They support various applications.[Learn More] - Equipped with the 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: H8S Family, H8SX Family, AE-5 Series smart card MCU
- Supported compiler: C/C++ Compiler Package for H8SX, H8S, H8 Family
- Learn More
Release Information
Latest Ver.: V.1.06 Release 00
Released: Nov 16, 2008
Details of upgrade (See Tool News)
Operating Environment
Agreement Details
Target Devices
Additional Details
Functions
The HI1000/4 kernel consists of the following modules. Each module is provided by functions (service calls) .
- Scheduler
Manages execution sequence of multiple tasks based on their priority levels. - Task management
Manages task status such as RUNNING, READY, WAITING or SUSPENDED. - Task-dependent synchronization
Changes task status from other task, and synchronizes tasks. - Interrupt processing
Returns from an interrupt handler. - Time management
Sets system timer used by HI1000/4 kernel and starts user-defined cyclic handler. - System State Management
Reports information such as version number of HI1000/4 kernel. - Synchronization/communication
Carries out synchronization and communication between tasks. The following function modules are available:- Event flag
Tasks are synchronized by the status of flags managed by the kernel. - Semaphore
Tasks are synchronized by the semaphore counter value managed by the kernel. - Mail box
Tasks are synchronized by sending or receiving a message. - Data queue
Tasks are synchronized by communicating 4-byte data.
- Event flag
- Extended Synchronization/Communication
Carries out synchronization and communication between tasks. The following function module is available:- Mutex
Makes use of priority ceiling protocol for avoiding priority inversion to synchronize tasks.
- Mutex
- Memory pool management
Dynamically allocates/frees memory area used by tasks. Enables efficient use of memory. - Cyclic handler function
Controls the execution of a handler activated periodically.
Kernel specifications
| Specifications/Functions: | Compliant with μITRON 4.0 specification
|
|---|---|
| Scheduling types: | Priority basis type / Event-driven type |
| Service call number: | 79 (Count xxx_yyy plus ixxx_yyy as one) |
| Maximum object number: | 255 (Only the cycle handler and the alarm handler have 15 each) A maximum value can be selected with the configurator |
| Maximum Priority number: | 31, A maximum value can be selected with the configurator |
| Performance (Time takes for a target task to be executed after the wup_tas is issued.) : | 7.4 microseconds (H8SX/1650, 35MHz, when on-chip memory is used in the advanced mode) 17.2 microseconds (H8S/2655, 20MHz, when on-chip memory is used in the advanced mode ) |
| Kernel code size : | From 2.3K bytes to 27.2K bytes |
| Kernel RAM usage per task: | Data: 20 bytes Stack: 50 bytes |
Components
| Item | Description | Note |
|---|---|---|
| Kernel source program | Kernel source program | Provided only with mass- production licenses which include source code. |
| Kernel library | Kernel library for system configuration | Supports advanced mode |
| Standard header files |
| Header files are provided both in Assembler and C languages |
| Configurator | To setup configuration parameters | — |
| Various sample programs |
| — |
| Workspace for configuration | HEW workspace for system configuration | — |
| Manual | HI1000/4series user's manual | — |
Processing Flow
Image
