PicChristmas
New Member
I have a light controller board with 18f2420 and would like to connect a 2nd board with an I2C bus. I'm looking for and easy way to pass the zero crossing (120 hz) interrupt from the 1st board to the second thru the I2C bus. The zero crossing must generate an interrupt or the slave poll the I2C so as act within 20 or 30 us of receiving the zero crossing. The plan is to use the same board for both the master and the slave but not have any AC components on the slave.