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I2C Communication Problem

 
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PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Jul 22, 2013 10:27 am     Reply with quote
I don't know how to make it work in Proteus. Proteus has weird things
like digital and analog pull-ups. It also may not work without the i2c
debugger turned on. I don't want to solve these problems. I only
use hardware to test i2c. The following method works with two hardware
boards (or two PICs on one board):

Use the CCS example file code, Ex_Slave.c, for the Slave PIC.
It's in this directory:
Quote:

c:\Program Files\picc\Examples\Ex_Slave.c


Use the code in this post for the Master PIC:
http://www.ccsinfo.com/forum/viewtopic.php?t=32368&start=3

Use these connections:
Code:


                +5v
                 |
                 <
                 > 4.7K       
To               <         
Master PIC       |           To Slave PIC
SDA pin   ------------------ SDA pin 
(pin C4)                     (pin C4)   

                +5v
                 |
                 <
                 > 4.7K       
To               <         
Master PIC       |           To Slave PIC
SCL pin   ------------------ SCL pin 
(pin C3)                     (pin C3)   


To
Master PIC                  To slave PIC
ground    ----------------- ground (Vss pins) 
(Vss pins)       |
               -----
                ---  Ground
                 - 
blacknyellow



Joined: 22 Jul 2013
Posts: 2

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PostPosted: Tue Jul 23, 2013 4:04 am     Reply with quote
Thank you sir. Maybe i should test my code on the board
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