Linux: AM335x PRU interrupt handling

Jaime Corchado

Tool/software: Linux

Hi guys, I have a problem with a board like the beaglebone in my company.

The board has a ARM processor, which run a Qt app, and 2 PRUs. I want to handle a interrupt in ARM from de PRU, but I dont fin any example about this.

Anyone can help me please?

Thanks and sorry for my English.

Jaime

over 7 years ago

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

Hi Jaime,

You can find some tips discussing PRU interrupts and ARM handling:
processors.wiki.ti.com/.../PRU_Linux-based_Example_Code
e2e.ti.com/.../239121
groups.google.com/.../
www.righto.com/.../pru-tips-understanding-beaglebones.html

BR
Tsvetolin Shulev

0 Jaime Corchado over 7 years ago in reply to Cvetolin Shulev-XID

Prodigy 40 points

I saw all this articles, I didn't explain good.

I need to handle a interrupt in ARM, but no polling handling, because in the project of my company the CPU(ARM) consume near to 100% of processing and I read that in theory with remoteproc is possible to catch the interrupt in the ARM environment.

I hope that I have explained good.

Thanks

Jaime

0 Nick Saulnier over 7 years ago in reply to Jaime Corchado

TI__Guru* 93345 points

Hello Jaime,

General information about RemoteProc and RPMsg can be found in PRU-ICSS Remoteproc and RPMsg Wiki. The wiki is accurate, except our more recent code examples use interrupts rather than mailboxes to communicate between the ARM and the PRU. The RPMsg Quick start guide might also be useful.

Sample PRU code can be found in the AM335x examples in the PRU Software Support Package. In particular, look at the PRU_RPMsg sample code. The PRU Software Support Package is included in the Linux SDK under /ti-processor-sdk-linux-.../example-applications/pru-icss-5.1.0 . Go through "LAB 5: RPMsg Communication between ARM and PRU" of the PRU Training Hands-On Labs. This example uses ARM code in the Linux SDK from /ti-processor-sdk-linux-.../board-support/linux-.../samples/rpmsg/rpmsg_client_sample.c

This "RPMsg Code Location" e2e post might have some additional helpful information for you.

Regards,

Nick

Processors

Processors forum

Linux: AM335x PRU interrupt handling