Difference between revisions of "Mutex"
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LDREX and STREX<ref name=M3177>The definitive guide to the CORTEX-M3, Second edition - section 10.6 page 177 (ISBN978-1-85617-963-8</ref> | LDREX and STREX<ref name=M3177>The definitive guide to the CORTEX-M3, Second edition - section 10.6 page 177 (ISBN978-1-85617-963-8</ref> | ||
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[[Category:Embedded]][[Category:ARM]] | [[Category:Embedded]][[Category:ARM]] | ||
Revision as of 09:14, 24 March 2012
A Mutex (Mutual Exclusion) is a method used to gain exclusive rights to use a shared resource in programming. Often used when designing software in embedded systems using interrupts and/or RTOS.
Example
In a interrupt driven embedded system there are two devices connected to a CAN bus. Two independent software routines communicate independent of each other with Device A and Device B through a shared CAN bus. See drawing below.
ARM Thumb
LDREX and STREX[1]
References
- ↑ The definitive guide to the CORTEX-M3, Second edition - section 10.6 page 177 (ISBN978-1-85617-963-8