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 the configurator which automatically generates startup files will help you greatly reduce development times and get your products to market more quickly.
Successors:RI600V4 Real-time OS for RX Family
Features
- Conformance with the µITRON4.0 Specification
- ROM-based implementation
- Kernel building made easy by the configurator
- Compatibility with the High-performance Embedded Workshop IDE will help you easily install the OS into your applications
- Supported compiler: C/C++ Compiler Package for RX Family
- Learn More
Release Information
Latest Ver.: V.1.01 Release 01
Released: Apr 16, 2013
Details of upgrade (See Tool News)
Operating Environment
Agreement Details
User's Manual: RI600/4 User's Manual (Real-time OS for RX Family) Rev.1.00
(PDF | English, 日本語)
Target Devices
Support
Support Communities
Knowledge Base
Additional Details
Successor
RI600V4 Real-time OS for RX Family
Functions
The RI600/4 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. - Synchronization/communication
Carries out synchronization and communication between tasks. The following function modules are available:- Semaphore
An object for exclusive control of shared devices and variables for two or more tasks. - Event flag
An object to control the execution of a task according to the AND/OR condition represented by bit pattern. - Data queue
An object to perform 1-word (32 bits) communication. - Mail box
An object to communicate an arbitrary-length message by pointer passing. - Mutex
An object to perform exclusive control, and providing support for the feature to avoid priority inversion problems. - Message buffer
An object to communicate an arbitrary-length message by copying.
- Semaphore
- Fixed length memory pool
An object to dynamically allocate/free memory of preassign fixed size. - Variable length memory pool
An object to dynamically allocate/free memory of arbitrary size. - Interrupt processing
Returns from an interrupt handler, enables/disables an interrupt for each task, and so on. - Time management
Sets system timer used by RI600/4 kernel and starts user-defined alarm handler, cyclic handler and overrun handler. - System configuration management
Reports information such as version number of RI600/4 kernel. - System state management
Modifies and refers system status. - Object reset function
Initializes the Data queue, Mail box, Message buffer, Fixed length memory pool, Variable length memory pool. This function is unique to the RI600/4 and is not defined in the μITRON4.0 specifications.
Kernel specifications
| Target CPU | RX Family |
|---|---|
| Maximum number of tasks | 255 |
| Number of priority levels | 255 |
| Service call number | 143 |
| Performance (Time takes for a target task to be executed after the wup_tas is issued.) |
2.5 microseconds (RX610, 100MHz) |
| Kernel code size | From 6.2K bytes to 25.5K bytes |
| Kernel RAM usage per task | data : 16 bytes stack : 44 bytes |
Components
| vided 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 | 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 C languages |
| GUI Configurator | The input the construction parameters on the GUI screen allows the output of the cfg file for cfg600. | — |
| Command Line Configurator (cfg600) |
Generates the various definition files from a cfg file on which construction parameters are described in plain text form. | — |
| Table generation utility (mkritbl) |
Generates the Interrupt Vector Table and Service Call Jump Table. | — |
| Manual | user's manual | — |
Processing Flow
