Hi all people here. I must to say im newbie in BB and RT data.
So, im going to ask simple: I need to acquire in ADC of the BB in RT over 44khz, only read, i dont need to process it in RT is it possible to use the ADC of the BB to do it and DMA..? If it possible, can you show me some sample code to start with, or where to look at? (some link).. Really thanks El lunes, 10 de septiembre de 2012 07:29:55 UTC-4:30, Evan Thomas escribió: > > > Hello, > > embedded/real time/hardware newbie here. I have an requirement to read an > ADC, perform some simple FP calculations and write to DAC. It needs to be > at least 20KHz but importantly the latency on the DAC/ADC needs to less > than 10us. Low jitter is also important. Is the beaglebone up to it? I see > this asked many times but not answered so I am not really expecting an > answer now :) > > I have two specific questions > > 1) This might be naive but I thought I would try the PREEMPT_RT patch. In > particular, I wanted to combine it with Robert Nelson's patches and build > process. After many hours of random git commands, patch and modifying > scripts I came to the conclusion that the current PREEMPT_RT patch is for > 3.4 whereas Robert's patches are for 3.6. Firstly, does it even make sense > to try PREEMPT_RT on BB? If so, what is the best way to proceed? Use 3.4 > versions of Robert's patches and risk bugs and missing features? Wait > for PREEMPT_RT patch against 3.6? > > 2) What is the best way to do low latency (<10us) 14bit ADC and DAC on the > BB? I assume it would have to be over the SPI bus, but beyond that I'm > clueless. If someone can point me in the right direction I would really > appreciate it. > > Thanks, > Evan. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
