On Tue, 3 Mar 2009 03:49:54 +0100 Vincent Trouilliez <vincent.trouill...@modulonet.fr> wrote:
> As I am trying to debug it presently, my problem right is that simply > requesting a start operation doesn't seem to succeed, FIXED ! Last week the mega32 on one of two targets was doing funny things with itsI/O pins, was faulty. This week the other mega32 on the second target, is doing the same ! It was failing to drive one of the two I2C lines ! Replacing it with a brand new chip instantly cured the problem. I can now read the various status(es? is that English?) on my LCD. I get 0x08 following the start, which is good, then I get 0x20 and 0x30, which is good too. Indicates that the slave's address and data byte have been successfully sent.. but not acknoledged, 'cause I blew the slave (PCF 8574, I/O expander, cheap way to test that the bus was working, by lighting LED's via this chip) when supplying it accidentally with unregulated 12Volts rather than the regulated 5 Volts, oops !!! :-O Poor slave... Will get a new one first thing tommorow, and hopefully everything should then be working :-) -- Vince _______________________________________________ AVR-chat mailing list AVR-chat@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-chat
