Quote from: BigJRepairs on February 05, 2014, 04:46:48 PM

Quote from: DrZeck on February 02, 2014, 06:06:08 PM

Hi Folks,

did anyone tried I2C board chain ? Is it working ?

Cheers,

Im interested in giving this a shot. I hope no one saw my original comment it was seriously retarded. I can breadboard it out. The design below the ISP on the schematic is reference for the chain right?

Yes, that is for chaining boards, the pads are located here: https://www.dropbox.com/s/f486v7mr564iy7d/board-layer01-top-name.png

i have build different boards and leave a connector for that but i am still waiting boards to arrive so i dont have 2 to try, i have one for debugging only: https://www.dropbox.com/s/9ojltfykb4v6sdb/IMG_20140205_192247.jpg

it is strange that this is working at all with pic connected like that bit i did not have qfn pic at the time.

this is the board with very poor dc dc design Grin

: https://www.dropbox.com/s/uisskylqk1uu1z1/IMG_20140117_134651.jpg

and the new Board: https://www.dropbox.com/s/pzs0ex8tyo5gyqh/HashMaster%201.8.png

So, i will try everything when i get boards, i will post results here.

If you try i2c chain please post some news, you need to connect SDA , SCL and GND for that to work, in parallel. Do not connect 3.3v pin.

So:

TP6 - 3.3V - DO NOT CONNECT

TP7 - SCL - CONNECT TO TP7 ON NEXT BOARD

TP8 - SDA - CONNECT TO TP8 ON NEXT BOARD

TP9 - GND - THIS IS GROUND, if you running boards on same power supply they are already connected so you can connect just signal lines ( SCL and SDA )

Good Luck