Beaglebone Black PRU to ARM High Speed Data Transfer

[DTJF]

@lrdewaal

Ideally what I would achieve is allocate some memory on the host for the PRUs to write into.

@gomer

A ring buffer is the ideal means to do this.

Yes, a ring buffer is fine!

But instead of using three blocks of 28k PRUSS memory, I recommend using a single continguous block of kernel memory allocated by the uio_pruss driver (ie 256k). The PRU directly writes to that memory (over L3 bus), where the ARM can fetch the data. Find source code in examples rb_file or rb_oszi. (In case of parallel access, ARM reading blocks PRU writing.)

No root access, all is running from user space.

Regards