SPI is simply enough that you can just 'bit-bang' on a couple of pins.

Bob  Ammerman
RAm Systems

----- Original Message -----
From: "Ted Larson" <ted@LARSONLAND.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, April 15, 2004 11:09 AM
Subject: [PIC:] I2C & SPI on the same PIC...


> All this talk about SPI devices, has me thinking about an interesting
> problem I have, that perhaps someone can suggest an easy solution for.
>
> I am not too familiar with SPI, I am just learning about it, however, I am
> pretty familiar with I2C at this point.  I have a circuit that has a
> PIC18F252 as an I2C master, and it talks to several I2C slave devices.  I
> have recently been presented with an SPI device that I need to interface
to
> the same I2C master PIC.  The SSP hardware on the PIC is pretty much I2C
or
> SPI, and not both.  Short of switching everything to SPI, what are my
> options?  Is there some kind of I2C to SPI converter out there?  I have
> poked around, and there doesn't appear to be a PIC with more than one SSP
on
> it...perhaps there is one I am missing?
>
> Thanks,
>
> - Ted
>
> --
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