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Week 5 Progress

A project log for PRUSS support for newer kernels

A communication framework between ARM and PRUSS on BeagleBone Black

Shubhangi GuptaShubhangi Gupta 07/01/2015 at 11:060 Comments

Developments:

1. Fix major bug in driver which had gone unnoticed. Word offset given to read/write routines was buggy.

2. Improved user library. Previously pru cores booted when remoteproc driver was probed. Now user has pruss_boot ( "fw_path" , PRU0/PRU1 ) and pruss_shutdown(PRU0/PRU1) routines to independently handle power to each core.

3. Able to register virtual device with vrings using remoteproc.

4. Better example application in which ARM writes 2 values to pru memory -> interrupts pru 1 -> pru 1 adds 2 values and writes result to new location -> pru1 sends interrupt to ARM -> ARM validates result

Issues Faced:

1. Have lagged behind a bit while trying to understand the intricacies of vring communication. Need to cover up.

Next week:

1. Finish and wrap up vring based message passing from both ARM and PRU end.

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