I2C start signal not correct on oscilloscope

by Risha

I2C problem using PIC18f4580 as master and PIC18f4550 as slave.

Hi folks,

my clock line is correct ie scl but sda wave form is not rite when I probe it using oscilloscope. its just noise. I am using PIC18f4580 as master and PIC18f4550 as slave.

Probing the signals on the master side.
for generating start signal setting the start enable bit and waiting or polling for the transfer to complete. The irony here is it completes but not show the rite waveforms on oscilloscope.

regards,
risha