From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Lewin A.R.W. Edwards" To: Subject: RE: [ECOS] USB host mode support? Date: Tue, 20 Feb 2001 05:54:00 -0000 Message-id: <4.3.2.7.2.20010220084532.00b46140@larwe.com> References: <200102201325.f1KDPGj27999@host184.cambridge.redhat.com> X-SW-Source: 2001-02/msg00330.html Hi Tim, >I think as more embedded systems grow there will be a need for host mode >USB. At this time I'm going to try a do a host mode version. Do you see >any big issues in porting BSD or Linux implementation to eCOS? I'm curious to know what kind of USB peripherals you think will be important to support in embedded systems. It would be pretty easy to add generic HID support, but almost every other device you can think of is proprietary. There are some generic chipsets e.g. for ATA interfaces and scanners, but often the implementation is customized so a vanilla driver won't work properly. Basically you're buying into the whole minefield of maintaining a general-purpose operating system, when consumers call you and say "My new widget no worky when I plug it in". So at that point it makes perfect sense (to me to cross over to a GP OS like Linux, as Bart said. As another BTW, although eCos doesn't explicitly support dynamic loading, it is possible to implement it with some magic. I have a (grossly imperfect) module-loader as a work-in-progress. The reason I need one is because we wish to allow developers to write add-on modules for our product without wiping the whole OS out of flash. I seem to recall someone (Grant Edwards?) writing about a similar need on the list some weeks ago. === Lewin A.R.W. Edwards (Embedded Engineer) Work: http://www.digi-frame.com/ Personal: http://www.zws.com/ and http://www.larwe.com/ "Und setzet ihr nicht das Leben ein, Nie wird euch das Leben gewonnen sein."