AM3359: adjusting data input size in full slave EtherCAT example

Part Number:AM3359

My system:

I am using EtherCAT stack (v5.12 from ETG) along with the full slave project (PRU EtherCATsoftware v 1.0.6); per corresponding release notes, these versions are compatible.  Using AM3359 ICE eval kit.

question:

EtherCAT full slave example uses 7 bytes for input process.  I added 64 bytes, total of 71 bytes. I always get 7 bytes regardless. Can you help resolving this issue. I hit some places where the debugger can’t find the source code. I believe its part of the PRU code. Is PRU source code available? Or it’s just binary?

Thank you in advance,

Juan