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Using SPI of a PIC

 
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Using SPI of a PIC
PostPosted: Mon Jul 09, 2007 11:47 am     Reply with quote
Hi,
I use the PIC 18F2480 and the SPI because of using an external ADC (AD7790).
Now I want to know how I "say" my PIC that it has to use only the external ADC alternativly how I can read from the SPI input?

Thanks!
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Jul 09, 2007 12:05 pm     Reply with quote
It requires a software driver. If you have the CCS compiler, look in
this directory for examples of drivers:
Quote:
c:\Program Files\Picc\Drivers


In that directory, one example of an ADC chip driver file is:
Quote:
AD7705.c


In the case of the AD7790, there isn't a driver file, and one would
have to be written.

It's my advice that you choose an ADC chip that already has a driver
available. Look either in the CCS drivers directory, or search the
internet for a driver by using Google. For someone who is a newbie
to micro-controllers, it's much easier if you use an existing driver,
instead of trying to write a new driver.
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