Hi Everyone,

Currently I m doing a project using 18F4550,my project has to accept user input via RS232 and send it to control a DAC configured in SPI.

The following are accomplished,

1) DAC is working fine only when SDO is enabled.

2) UART is working fine.

my problem is when I configure ie multiplex both RX and SDO (SPI) in the same project only the RS 232 is working and the DAC is not working.

Pls help me.

 

Here's a good link:
http://forum.allaboutcircuits.com/announcement.php?f=5&a=3

... especially item 4.

 

Thanks a lot