AI-64 PRU Getting started

[karel]

Hello,

BB-AI-64 draw my attention because of it’s 12 PRU’s in combination of 4GByte of RAM.
Now, I have the board on my hands, I can find little information about those PRU.
I have seen this topic:

AI-64 - remoteproc confusion

Hi Andrew, Your post got me interested in this and I just happened to have downloaded the Ref Manual for J721E/TDA4VM . So I started going down the rabbit hole. It appears remoteproc16 - remoteproc19 are the (4) R5F cores running in split mode on the main domain (two, 2-core clusters each running individually). The single remoteproc15 (bus@28380000) appears to be the one from the cluster on “MCU island” According to the Ref sheets, any cluster may be run optionally individually in “split” mo…

Despite I have knowledge in the domains of electronics, linux, SBC and microcontrollers, the beaglebone family and it’s PRU functionality is completely new to me.
Where can I find which pin is controllable by which PRU?
What speed does this PRU has?
How to program PRU on AI-64?
Or in short:
What is the best way to get started with PRU on AI-64?

Thanks,
Karel.

[AndrewCapon]

I’m guessing they are 200Mhz but I have not checked this yet.

There is some basic info about getting things going on the AI64 here: AI64 - PRU Basics (very)

[jkridner]

They can go up to 360MHz. I’m not yet sure how to change the clock frequency.