RI600/4 Real-time OS for RX Family (Discontinued product)

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.
• 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

Components

Processing Flow

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