Linux/am5728: PRU UART and eCAP support

Timothy Barr

Part Number: AM5728
Other Parts Discussed in Thread: AM5728

Tool/software: Linux

I am working on an AM5728 design and would like to know how difficult it would be to used the PRUSS UART and ECAP functions in the standard Linux build. Because of the pin muxing requirements of my design, I am running out of serial UARTs. I also have a requirement for syncing the system clock to a GPS PPS signal. So I am thinking that I could use the PRUSS subsystem for this. I need to know how much support is available in the Linux distribution for simple usage of the PRUSS so I can feed that back to my software team. Thanks!

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The PRU experts have been notified. They will respond here.

0 Jason Reeder over 8 years ago in reply to Biser Gatchev-XID

TI__Genius 10440 points

Tim,

We provide the PRU Software Support Package in the example-applications directory of the Linux Processor SDK. You can also find the git repository for that package here: git.ti.com/.../

In the 'include/am572x_2_0/' directory you'll find header files for both the PRU eCAP peripheral as well as the PRU UART peripheral. Example applications for the am572x device can be found in the 'examples/am572x/' directory of the package. There is an example of how to use the PRU UART peripheral in the 'examples/am335x/PRU_Hardware_UART/' directory that should port fairly easily to the am572x device that you are using.

Here is a quick start guide that should get you up and running with running the provided out-of-box PRU example from the Linux Processor SDK: processors.wiki.ti.com/.../RPMsg_Quick_Start_Guide

Here is the landing page wiki for the PRU Subsystems: processors.wiki.ti.com/.../PRU-ICSS

Jason Reeder

Processors

Processors forum

Linux/am5728: PRU UART and eCAP support