July 2008
Beginner to intermediate
272 pages
7h 40m
English
Content preview from Windows® Embedded CE 6.0 FundamentalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Interrupt Architecture
Practically all peripheral devices use interrupts to inform the operating system that certain actions need to be taken to provide services for those devices. A device driver must process an interrupt in order to provide a necessary service to a peripheral device.
A physical interrupt request (IRQ) is a hardware line by which a device sends an interrupt signal to a microprocessor. A system interrupt (SYSINTR) is a mapping of the IRQ for which an OAL is responsible.
Some peripheral devices do not generate microprocessor interrupts. In those cases, a device controller processes interrupts.
Under Windows Embedded CE, interrupt processing is divided into two parts: interrupt service routine (ISR) and interrupt service thread (IST). ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.