Messages in this thread |  | | Date | Tue, 30 Oct 2001 12:49:18 +0100 | From | david.heremans@siemens ... | Subject | Low-level help needed with leds |
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Hello all,
I'm writing to this maillinglist as a last resort, since reading books and other peoples code didn't solve my problem, and it is on the vague boundary of userspace/kernel.
I recently got hold of a nice little piece of hardware that must be connected between the computer and the keyboard. You can program this device by sending it bytes trough the keyboard-leds. More about this device at http://www.andywarne.pwp.blueyonder.co.uk/, the device is called the I-Pac.
The programming protocol description I got from the maker of this hardware states this sequence. 1. Set any led combination execpt all leds on. 2. Send five times all leds on. 3. The I-Pac will send a key-down code for the 'Y' (ready to program) or 'J' (jumper set to fixed) key.
I don't get this key code back. I was wondering if I misunderstood the way the Linux kernel sends this LEDs commands. Does it send extra led commands that I don't know about? Maybe it doesn't send twice the same led formation since it would be a logical optimisation? Honestly, I'm completely clueless by now, and digging into the Linux source code is way to complicated for me, I honestly tried but got lost in it (tasklets et all) :-(
I took the liberty of attaching a simplified version of my programming tool. If some of the more knowledgable people here could please help me out, thanks.
Sincerely, David Heremans
PS: I'm not subscribed to this list, I just scan the archieves and digests from time to time. So I you reply please put me in CC. PPS: When compiling the c program I also got redefine warnings in headers, sugestions to solve these are also welcomme, the include list I use is a mix of other example programs, so I'm not sure which are the exact ones to use. [unhandled content-type:application/x-gtar]
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