HI2CREAD for 18Fs

**Charles Linquis** · - 25th October 2008, 20:22

I have seen several examples of hardware I2C slaves on this forum. When I try to implement them, they never work. Most of the code is for 16F devices, which I avoid like the plague. I'm sure the problem is in front of my keyboard, but realizing that doesn't get my project working.

Is anyone willing to provide me with a block of tested code for 18Fs?

**BigWumpus** · - 25th October 2008, 23:20

I have an 18F252 as a I2C-Slave in PBP using ASM-code for the I2C-interrupts.
OK ?

**Charles Linquis** · - 26th October 2008, 00:41

I'm happy that you have that code... Would you care to share, or is it in some 'public' place already?

**bcd** · - 26th October 2008, 11:35

I'd also love to see that. Getting my hands dirty with HW I2C isn't quite as much fun as I though it might be...

bill.

**BigWumpus** · - 26th October 2008, 13:42

Hello,

find attached my code (2 years old and not the best!).
I have removed the maincode.
I2C reads in bytes and fills up a buffer I2C_In.
The maincode generates data in a second buffer I2C_Out.

The incoming bytes are only single bytes, I don't know if the routine will manage more than 1 data in a message.

Just read the code and try to understand the statemachine of the I2C-hardware.