RI78V4 V1 Real-time OS for RL78 Family and 78K0R

infoAdditional Details

Cooperating Tools

• Supported compiler :CC-RL
• Supported IDE: CS+

Functions

The RI78V4 kernel consists of the following modules. Each module is provided by functions (service calls) .

• Task management functions
  The task control functions provided by the RI78V4 include a function to reference task statuses, in addition to a function to manipulate task statuses.
• Task dependent synchronization functions
  Changes task status from other task, and synchronizes tasks.
• Synchronization and communication functions
  The synchronization and communication functions of the RI78V4 consist of Semaphores, Eventflags, and Mailboxes that are provided as means for realizing exclusive control, queuing, and communication among tasks.
  • Semaphores: In the RI78V4, non-negative number counting semaphores are provided as a means (exclusive control function) for preventing contention for limited resources (hardware devices, library function, etc.) arising from the required conditions of simultaneously running tasks.
  • Eventflags: Provides 16-bit eventflags as a queuing function for tasks, such as keeping the tasks waiting for execution, until the results of the execution of a given processing program are output.
  • Mailboxes: Provides a mailbox, as a communication function between tasks, that hands over the execution result of a given processing program to another processing program.
• Fixed-sized memory pool
  When a dynamic memory manipulation request is issued from a processing program in the RI78V4, the fixed-sized memory pool is provided as a usable memory area.
• Time management functions
  The time management functions of the RI78V4 include Delayed Wakeup, Timeout, and Cyclic Handlers that use timer interrupts created as fixed intervals, as means for realizing time-dependent processing.
• System state management functions
  For changing or referencing the system state.
• Interrupt management functions
  Provides as interrupt management functions related to the interrupt handlers activated when a maskable interrupt is occurred.
• System configuration management functions
  Provides system initialization processing, which is required from the reset interrupt output until control is passed to the task, and version information referencing processing.
• Scheduler
  The scheduling functions provided by the RI78V4 consist of functions manage/decide the order in which tasks are executed by monitoring the transition states of dynamically changing tasks, so that the CPU use right is given to the optimum task.

Specifications

Components

Processing Flow

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