Hi I am facing a strange problem with my application. I have some code running on PRU0 and PRU1 that share some data using scratchpad. PRU1 also send some data to ARM, 32 bytes at each time with a counter value as timestamp. each time a new chuck of data is ready, it is written in a circular buffer on shared memory, also a pointer is updated in a fixed position of the shared memory and a interrupt is sent to the ARM. On the ARM side, each time the interrupt is received, the pointer is read so it can get the last chunk of data. So far so good. Analyzing the data received on the ARM side, we note some samples are missing, eg: timestamps are 1000, 1001, 1003, 1004, 1005.... (1002 is missing) and this is expected. That is the point in having a ring buffer. The problem is that sometimes, some samples are repeated. ex: 1004, 1005, 1005, 1006, 1008.... The only way I can think of this to happen is that for some reason the PRU flush data to the shared ram but this write is not completed before the interrupt is sent to the ARM... the ARM read the shared memory but finds old data. Here comes my question: I can deal with it as it happens here and there, but where and how can I investigate it further and maybe, how to ensure that this will not happen or at least, do not get worst?
Thanks, Carlos Novaes -- 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.
