Hi,
I need three PICs to communicate with each other via
SPI bus.  I setup one as a SPI Master and the other
two as SPI Slaves.

The communication was fine with 1 Master and 1 Slave
until I connect the second Slave to the SPI bus .  I
think the problem is related to the SDO signal of the
two slaves.  When the SPI Master wants to talk to the
second Slave, because the SDI signal of the Master is
held either high or low by the first Slave, the second
slave cannot toggle the SDO pin (since they are tied
together at the Master's SDI pin).

I tried to sum the two SDO signals of the two Slaves
via 1K resistor, but the comm is still intermittent. 
Is there other anyway around this?  Thanks!
Best regards,




	
		
__________________________________ 
Yahoo! Mail - PC Magazine Editors' Choice 2005 
http://mail.yahoo.com
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist