#use fast_io() and i2c

[Guest]

#use fast_io() can't be used with i2c?

[Mark]

#use fast_io() just tells the compiler not to control the tris register when accessing the I/O. It should not have an affect on I2C.

[chava]

Hello
I2C is a bi-directional communication, so the SDA line has to change roll from input to output during the transmition.
you should check if, when you use I2C, the tris is been changed by the program (ie if the compiler generated a code that take care of the tris, inspite of the use fast io directive.)
if not, you should cancel the fast io for the program part which related to the I2C communication

let me nkow if you succeeded
E2D
Chava Jukin
jukingh@zahav.net.il