Hi I had read your message. I am getting the majority of the i2c data. Unfortunately the data from the tuner is the bit that is getting corrupted. I did not put the diodes into the circuit. With the i2c monitor plugged into the computer parallel port the windows tuner does not work ( but the other parts apparently work ). With the i2c monitor unplugged the computer loads the software without any problems. This implies that the additional loading caused by the parallel port is causing minor corruption of the i2c bus data. I have tried putting a hex inverter (going through 2 for each channel) inline being supplied with volts from the parallel port. Unfortunately the device I used (MC140969UBCL) could not sink enough current and was not pulling the input to the parallel port down enough to be detected properly. However the tuner stuff loaded OK, so the next thing to try is hex driver chip which should have the same input impedence so not cause any poblems with the i2c bus, but should be able to sink enough current to fully switch the parallel port input.
Best Regards Trev On Saturday 19 Feb 2005 20:52, Martin Vaughan wrote: > In case you haven't already, see the post I made here > http://www.gossamer-threads.com/lists/ivtv/devel/17705 > > I had much better success when I used a different PC, which probably had > a different parallel port IC. > > > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > ivtv-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ivtv-devel ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
