Multi-tasking real-time operating system for microprocessors...

Details Multi-tasking real-time operating system for microprocessors... Multi-tasking real-time operating system for microprocessors...

2011-08-23

2011-08-23

Tang, Kenneth (Department: 2196)

Electrical computers and digital processing systems: virtual mac

Task management or control

Process scheduling

C718S102000, C712S228000

Reexamination Certificate

active

08006247

ABSTRACT:
A real-time operating system (RTOS) for use with minimal-memory controllers has a kernel for managing task execution, including context switching, a plurality of defined tasks, individual ones of the tasks having subroutines callable in nested levels for accomplishing tasks. In the RTOS context switching is constrained to occur only at task level, and cannot occur at any lower sub-routine level. This system can operate with a single call . . . return stack, saving memory requirement. The single stack can be implemented as either a general-purpose stack or as a hardware call . . . return stack. In other embodiments novel methods are taught for generating return addresses, and for using timing functions in a RTOS.

REFERENCES:
patent: 6279046 (2001-08-01), Armstrong et al.
patent: 6823517 (2004-11-01), Kalman
patent: 7707582 (2010-04-01), Kalman
patent: 2010/0199288 (2010-08-01), Kalman

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