How to manage several acqusitions on TMS320

HEre is my question ...
I have 20 acquistions to realise on a  TMS320F28xx (100 Mips)
The sample rate is 1khz.

If i don t use the ADC of the TMS230F28xx ,
Is it possible to use 20 external ADC linked with the TMS320 with SPI ?
But especially, is the GPIO Mux  able to manage silmunatous input acquisition?
Or do i have to use a time delay between 2 acquistions?

Thank you

X-No-Archive:  Yes

domistep@free.fr (domistep) wrote:

>HEre is my question ...
>I have 20 acquistions to realise on a  TMS320F28xx (100 Mips)
>The sample rate is 1khz.
>
>If i don t use the ADC of the TMS230F28xx ,
>Is it possible to use 20 external ADC linked with the TMS320 with SPI ?
>But especially, is the GPIO Mux  able to manage silmunatous input acquisition?
>Or do i have to use a time delay between 2 acquistions?

I would think that you would need some sort of multiplexer
arrangement, where you are running the ADC's into the inputs of
multiplexer, and then the TMS is used to sample it's output.  An
additional port on the TMS can be used to change the multiplexer
settings, to select the different ADC to be connected to the
multiplexer output.

Robert

www.gldsp.com

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www.numbersusa.com
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