User Rank
Re: Part III: Hardware & Software Sharing Responsibilities
GStringham   5/23/2012 3:13:56 PM
@luiscost - The fundamental communication between hw and sw is simply sw writes to a hw register when it needs to tell hw something, and hw generates an interrupt when it needs to tell sw something. In most cases, a sw driver totally owns its respective hw registers. No coordination needed. The only complication is that when hw generates an interrupt, it takes some decoding to determine which driver the interrupt is for. Then that driver services it as necessary. IPC is necessary because both processes can't be running at the same time. So IPC is needed to hold messages (and data) until the other process is allowed to run. That's not an issue between hw and sw.

Partner Zone
Latest Analysis
A panel on cybersecurity at ARM TechCon called for regulations to protect the security of connected devices.
Do you wear your ugly Christmas sweater while fighting zombies, or simply chill in front of your homemade entertainment center while your automated cat feeder keeps your feline friend at bay? Whatever you prefer, one of the following gadgets is sure to get your DIY motor running.
The design of products has been altered altogether through 3D printing. Parts that couldn’t be produced at all before 3D printing came along are often superior to conventionally produced parts.
Marine mussels and their interaction with the ocean environment has inspired a breakthrough in developing a nontoxic coating for organic electronic components that also could speed up the manufacturing process.
The Innovation Challenge Awards had one run-away winner at ARM TechCon 2016. Of the six awards presented, one company walked away with four.
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 10 - 14, Embedded System Design Techniques™: Getting Started Developing Professional Embedded Software
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course November 8 - 10:
Sponsored by 3M
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service