M3T-MR30/4 Real-time OS for M16C Series and R8C Family

Functions

The M3T-MR30/4 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, enables/disables an interrupt for each task, and so on.
• Time management
  Sets system timer used by M3T-MR30/4 kernel and starts user-defined alarm handler and cyclic handler.
• System State Management
  Reports information such as version number of M3T-MR308/4 kernel.
• State management
  Modifies and refers system status.
• 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 recieving a message.
  • Data queue
    Tasks are synchronized by communicating 2-byte data.
• Memory pool management
  Dynamically allocates/frees memory area used by tasks. Enables efficient use of memory.
• Cyclic handler function
  Controlls the execution of a handler activated periodically.
• Alarm handler function
  Controlls the execution of a handler activated at the specified relative-time.

Specifications

Components of Evaluation License Package

Processing Flow

Image

The automatic routine setup function for initializing timer does not support the following MCUs.

• R8C Family
• M16C/60 Series : M16C/63 Group, M16C/64 Group, M16C/64A Group, M16C/65 Group