time required for fast_io ports to switch between input and

[cmccabe]

Hi, I'm using PCM on a PIC16F877. I'm trying to get fast_io to work with port c.<p>
Does anyone know what the minimum time required to shift from output to input is? I am emulating a bidirectional bus.<p>
___________________________
This message was ported from CCS's old forum
Original Post ID: 144515334

[Sherpa Doug]

:=Hi, I'm using PCM on a PIC16F877. I'm trying to get fast_io to work with port c.<p>
:=Does anyone know what the minimum time required to shift from output to input is? I am emulating a bidirectional bus.<p>

Probably about the time it takes for two opcodes or Xtal speed/8. It is just the time to write a new value to the tristate register. Write a trivial program, compile it and look at the list file.

___________________________
This message was ported from CCS's old forum
Original Post ID: 144515336