2015-06-10 18:24 GMT+02:00 William Hermans <[email protected]>: > > Charles, and a couple other people talk some about cycles and how many > cycles reading / writing takes to various addresses. Not sure this will > answer your question thoroughly or not. One user suggests using PRU0 to > write to the PRU shared RAM, while PRU1 takes this data, and writes it to > DDR. Instead of using DMA. >
I don't know if this is a good idea. I think this would lock both PRUs when accessing shared RAM because only one can access it at the same time. As far as I remember TRM, a PRU writing to DRAM would halt the main core, not vice-versa. When this is correct the additional write/read operation to shared RAM not only wastes a full PRU core but also adds some additional delays without winning something. On the other hand: how much data do you really retrieve from your camera? And how long would data transfer to DDR really take comparing to the remaining time between two pictures? -- 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.
