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hello all
            a newbie here
I was looking for some information on GPIO and McBSP
Can some one explain me difference/similarities/general concepts...some
pointer will be good too

Thanks
SQ

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sciencequest wrote:
> hello all
>             a newbie here
> I was looking for some information on GPIO and McBSP
> Can some one explain me difference/similarities/general concepts...some
> pointer will be good too
> 
> Thanks
> SQ
> 
> 
> 

GPIO = General Purpose I/O
McBSP = Multi-channel Buffered Serial Port

GPIO would be used for things such as turning an LED on/off or perhaps 
enabling/disabling some other device.  In general it is good for things 
that have on/off states.

The McBSP is for doing communication.  It could be used to talk to an 
A/D and/or D/A.  You could also use it as a chip-to-chip connection to 
send data back and forth between two devices.  It has a clock, 
frame-sync, and data line for both transmit and receive.

Sometimes people will use GPIO to do communications.  This is often 
called "bit banging" because you need to do a whole bunch of writes to 
the GPIO to mimic things like clocks, etc.  Generally "bit banging" is 
done in order to save money by squeezing into a cheaper part that 
doesn't have all the interfaces you need.

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You could find much details of McBSP in Peripherals Guide at
www.ti.com
Alternatively, TMS320C6000 DSP Multichannel Buffered Serial Port
( McBSP) Reference Guide (Rev. G) would also help.

- Jude

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