[beagleboard] Re: What determines the sampling frequency of BBB

[Karl Karpfen]

For an oscilloscope this is quite slow. how about using PRU ADC sampling?

Am Dienstag, 8. September 2015 06:52:18 UTC+2 schrieb TJF:
>
> The TSC_ADC_SS can sample at 200 kHz.
>
>

-- 
For more options, visit http://beagleboard.org/discuss
--- 
You received this message because you are subscribed to the Google Groups 
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to beagleboard+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[beagleboard] Re: What determines the sampling frequency of BBB

[You Zhen]

On Tuesday, September 8, 2015 at 7:46:32 PM UTC+8, Karl Karpfen wrote:
> For an oscilloscope this is quite slow. how about using PRU ADC sampling?
> 
> Am Dienstag, 8. September 2015 06:52:18 UTC+2 schrieb TJF:
> The TSC_ADC_SS can sample at 200 kHz.

Agree, 200KHz is abit too slow, we are looking at >10MHz, am thinking in the 
same line using PRU ADC, but not sure how to achieve the high frequency by 
using PRU ADC.the sampling frequency of PRU ADC is determined by ADC only? Any 
other factors will affect? Or there is any better way?Thanks 

-- 
For more options, visit http://beagleboard.org/discuss
--- 
You received this message because you are subscribed to the Google Groups 
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to beagleboard+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [beagleboard] Re: What determines the sampling frequency of BBB

[Karl Karpfen]

PRU is running at 200 MHz, when you plan to have sample rates of more than
10 MHz you will have to do the whole ADC sampling of one frame in less than
20 clock cycles/with less than 20 instructions. Sounds like you have to do
that with highly optimised PRU-ASM-code ... and I'm not sure if this will
fit...

2015-09-08 15:00 GMT+02:00 You Zhen :

> On Tuesday, September 8, 2015 at 7:46:32 PM UTC+8, Karl Karpfen wrote:
> > For an oscilloscope this is quite slow. how about using PRU ADC sampling?
> >
> > Am Dienstag, 8. September 2015 06:52:18 UTC+2 schrieb TJF:
> > The TSC_ADC_SS can sample at 200 kHz.
>
> Agree, 200KHz is abit too slow, we are looking at >10MHz, am thinking in
> the same line using PRU ADC, but not sure how to achieve the high frequency
> by using PRU ADC.the sampling frequency of PRU ADC is determined by ADC
> only? Any other factors will affect? Or there is any better way?Thanks
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to a topic in the
> Google Groups "BeagleBoard" group.
> To unsubscribe from this topic, visit
> https://groups.google.com/d/topic/beagleboard/NCKlyv1gmIA/unsubscribe.
> To unsubscribe from this group and all its topics, send an email to
> beagleboard+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>

-- 
For more options, visit http://beagleboard.org/discuss
--- 
You received this message because you are subscribed to the Google Groups 
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to beagleboard+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[beagleboard] Re: What determines the sampling frequency of BBB

[TJF]

Hi!

What do you mean by "its low sampling"?

The TSC_ADC_SS can sample at 200 kHz.

BR

-- 
For more options, visit http://beagleboard.org/discuss
--- 
You received this message because you are subscribed to the Google Groups 
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to beagleboard+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.