I2C and PORTC general I/O not working...

petersonj · Joined: 31 Mar 2006 Posts: 1

I have been using the EX_SLAVE.C example sucessfully for simple I2C communications on a PIC16F777.

In the main(), while(true){} loop, I tried to use the the other PORTC pins for general I/O and it looks like the I2C communications stopped functioning or the interupt stopped firing... anyway it doesn't work.

All I did was put output_low(PIN_C7) in the while loop, and now the I2C inturupt does not get called (at least thats what it looks like).

I have searced the form but with no luck.

I would like to use the other six pins for I/O.
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Thanks,

Jason

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

No problem doing that. Post a small test program that demonstrates the problem.

rnielsen · Joined: 23 Sep 2003 Posts: 852 Location: Utah

Make sure that both SDA and SCL are configured as inputs. Simply do junk = input_c(); and that should do it.