Your target seems to be possible. The PRU clock is very stable. Start with example code at pruss_toggle <http://users.freebasic-portal.de/tjf/Projekte/libpruio/doc/html/ChaExamples.html#sSecExaPruToggle>. Adapt the pinmuxing and the PRU firmware:
1. PRU generates your desired 1 Hz pulse train 2. PRU starts first, waits for the first PRU-1 pulse on a GPIO input, and then sends synchronised pulses on a GPIO output. The only problem is to get PRU-1 starting at the obtained timestamp by the ARM (linux) process. -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/4726a01c-b83b-4061-ac1a-e5ac086c539e%40googlegroups.com.
