RTEMS 4.6.0 On-Line Library

RTEMS C User's Guide

6.3.2: Directives Allowed from an ISR

Using the interrupt manager insures that RTEMS knows when a directive is being called from an ISR. The ISR may then use system calls to synchronize itself with an application task. The synchronization may involve messages, events or signals being passed by the ISR to the desired task. Directives invoked by an ISR must operate only on objects which reside on the local node. The following is a list of RTEMS system calls that may be made from an ISR:

• Task Management
  • task_get_note, task_set_note, task_suspend, task_resume
• Clock Management
  • clock_get, clock_tick
• Message, Event, and Signal Management
  • message_queue_send, message_queue_urgent
  • event_send
  • signal_send
• Semaphore Management
  • semaphore_release
• Dual-Ported Memory Management
  • port_external_to_internal, port_internal_to_external
• IO Management
  • io_initialize, io_open, io_close, io_read, io_write, io_control
• Fatal Error Management
  • fatal_error_occurred
• Multiprocessing
  • multiprocessing_announce

RTEMS C User's Guide

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