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Suppose you are writing a large software package for a data acquisition application the data is to be acquired by a memory mapped device which connects to the system bus and interrupts the CPU anytime?
Wiki User
∙ 16y ago
Sounds like a good solution.
Personally, I'd write it in UNIX, Linux or some other interrupt driven operating system. I'd hang a read or otherwise set a wait flag for the interrupt, then flush the buffer.
If the memory mapped device device is well established, with some nice protocols, it's probably setting the interrupt flag when data is ready. If that's the case, when you receive the interrupt, just read the data. Unfortunately, you may have a device that isn't quite so mature, in which case you'd need to trap each byte. If that's the case, you'll need to find a way to populate the buffer and validate the data stream.
Wiki User
∙ 16y ago
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