PIC18F87J60 I/O problems when using ethernet

[EdwardH]

Hi,
I've got a PIC18F87J60 running the TCP server sample app and I've modified it to echo back any data sent via TCP, however as soon as I include the "ccstcpip.h" file any lines in my code that do things like output_low, output_high etc stop working. Any ideas as to why?

e.g. This code should toggle the B3 pin every 300 ticks, but it doesn't. I've even tried putting output_low at the start of the loop and output_high at the end, ignoring the tick count etc and it still doesn't work.

[jgschmidt]

If you look at hardware.h, which is part of the TCP/IP stack, you will see #use fast_io(x) for ports A, B and C. This is different from the default standard_io used by the CCS compiler. With standard_io, CCS sets all the TRIS registers appropriately.

On a project I had I made sure TCP/IP was not using port B, for example,
and then commented out the #use fast_io(B).

Otherwise, you'll have to manually set the TRIS bits for the io ports you are using.

Actually, since you are not communicating to an external NIC, you can probably comment out all the fast_io statements. Try it, see what happens. Check the CCS help file for more information about fast vs standard IO.

[EdwardH]

That work fine. Thanks for the help.