SYSTEMS AND METHODS FOR EMBEDDING INTERRUPTS INTO A SERIAL DATA STREAM
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United States of America Patent
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Issued Date -
May 5, 2011
app pub date -
Oct 30, 2009
filing date -
Oct 30, 2009
priority date (Note) -
Abandoned
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Abstract
Systems and methods for transmitting and processing interrupts by embedding interrupt information into a serial data stream are disclosed. An event is detected and converted into an interrupt signal. The interrupt signal is converted into a special interrupt character or symbol sequence. The special interrupt character or symbol sequence is embedded into a serial data stream at the next available character or symbol boundary and transmitted to a receiving controller. The receiving controller strips the special interrupt character or symbol sequence from the serial data stream and raises a corresponding interrupt. The receiving controller processes the interrupt by interrupting normal processing to run an interrupt subroutine. Once the receiver has detected and raised an interrupt, it can return an acknowledgement character or symbol sequence by the same mechanism. The transmitter can repeat the interrupt embedding and transmission if it fails to receive the acknowledgement within a predetermined period of time.
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