I2C Slave with a PIC

[tacbanon]

Hi Charles, thanks for sharing..I will try it out..


tacbanon

[tacbanon]

@Charles
Sorry I was not able to make it work on my setup..I'm not really sure what the following code is doing, so I tried to comment it and assign a value, but no effect.

I2CMajorAddress     CON $3
I2CDeviceAddress =  $8     
'I2CAddress = (I2CMajorAddress <<4) | I2CDeviceAddress 
I2CAddress =$14

I hope it will be alright if you share the master side code?

Thanks,
tacbanon

[Darrel Taylor]

At this point, I'm thinking Al (aratti) was right.

AN734 didn't work either.
Bytes are being put in the SSPBUF without an address match.
So the slaves that aren't being accessed are overflowing during reads from other devices.

The code I gave earlier works because it's resetting the overflow in the main loop, but that's just not right.

I'm trying to get some more info from Labcenter.

[Charles Linquis]

I am using a slight variant of the code I posted, and it is working fine. The only major change is that I'm sending a packet length byte, and I'm handling the entire receive packet inside the ISR. This is safe because I have my ( higher priority) timer interrupt watching over the whole process.

[tacbanon]

Hi,
Just want to ask if anyone tried to extend say 50meters communication between master and slave using I2C bus extender P82B715PN or similar?

Regards,
tacbanon

[Darrel Taylor]

tacbannon,

The problem with Proteus and multiple I2C slaves has been fixed by Labcenter.
If you update Proteus to 7.10 SP1, you should have better luck.

[tacbanon]

@ DT, Thanks for the update..I will find time to play with it(I2C multiple slaves) this weekend(so many work, little time to play )

Kind regards,
tacbanon