MR8C/4 Real-time OS for R8C Family (Discontinued product)

• Conforms to industry standard μITRON 4.0 specifications
  The μITRON arranges and standardizes the ITRON specifications for embedded systems. MR8C/4 conforms to the μITRON 4.0 specifications, and provides service calls suitable for R8C Family MCU functions.
• Compact size for ROM
  The MR8C/4 kernel is provided in library format. You can link only the functions you need at the time of system generation and minimize application software size.
• Integrated development environment High-performance Embedded Workshop supported
  From the Renesas integrated development environment "High-performance Embedded Workshop" (included in M3T-NC30WA) screen, OS-embedded applications can be developed using common operations of the Renesas MCU toolchain.
• Easy configuration on GUI
  Using the combination of GUI configurator and cfg8c configurator based command line lets you automatically generate makefiles or start-up programs that rely on development products by just creating a simple definition file (configuration file). This enables you to install the necessary libraries without omission so you can easily and reliably process parts specially suited to the product.
   

Screen Image : Configurator

The MR8C/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 MR8C/4 kernel and starts user-defined alarm handler and cyclic handler.
• System State Management
  Reports information such as version number of MR8C/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.
  • Data queue
    Tasks are synchronized by communicating 2-byte data.
• 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.
   

(1) With source code
 

• Components of Evaluation License Package
• Mass production rights (For details, see the License Agreement.)
• MR8C/4 kernel libraries (mr8c.lib) source files
   

(2) No source code
 

• Components of Evaluation License Package
• Mass production rights (For details, see the License Agreement.)