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Using Hardware i2c as slave and a software i2c as Master

 
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JakobDM



Joined: 15 Jun 2011
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Using Hardware i2c as slave and a software i2c as Master
PostPosted: Wed Jun 15, 2011 1:27 pm     Reply with quote
Hi

In a current project I need to be communicating to a few devices via i2c, but my PIC18F2455 is already a i2c slave.
The documentation mentions for i2c FORCE_SW. Is it possible to do the following:

Code:

#use I2C(slave,sda=PIN_B0,scl=PIN_B1, FORCE_HW)
#use I2C(master,sda=PIN_B5,scl=PIN_B6, FORCE_SW)


Would you need to write any code in order to make the master part work?

Best regards
Jakob
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Jun 15, 2011 2:01 pm     Reply with quote
You should add the stream parameter to each one and give each
stream a unique name. Then use the stream ID in i2c_start(),
i2c_write(), i2c_read(), i2c_stop(), etc.

Also, you are using the debugger's clock pin (Pin B6) for the Master,
so don't expect to be able to debug the program with your ICD.
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