Книга: Real-Time Concepts for Embedded Systems

10.7 Points to Remember

10.7 Points to Remember

Some points to remember include the following:

· Exceptions are classified into synchronous and asynchronous exceptions.

· Exceptions are prioritized.

· External interrupts belong to the category of asynchronous exceptions.

· External interrupts are the only exceptions that can be disabled by software.

· Exceptions can be nested.

· Using a dedicated exception frame is one solution to solving the stack overflow problem that nested exceptions cause.

· Exception processing should consider the overall timing requirements of the system devices and tasks.

· Spurious interrupts can occur and should be handled as any other interrupts.

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