PRU Firmware loading and verification

hardik gohil

Hello ,

I am working on AM335x module and using Yocto meta-ti to generate Images for the board.

since the drivers were not available in kernel 3.12 I have managed to add remoteproc and rpmsg source to my kernel using TI SDK(linux-4.1.13+gitAUTOINC+8dc66170d9-g8dc6617)

referring to the document

http://processors.wiki.ti.com/index.php/PRU-ICSS

following are the drivers created

ls /lib/modules/3.12.30-AM335x-PD15.2.1/kernel/drivers/remoteproc
pruss_remoteproc.ko remoteproc.ko

ls /lib/modules/3.12.30-AM335x-PD15.2.1/kernel/drivers/
rpmsg_pru.ko virtio_rpmsg_bus.ko

I have loaded the modules.

As the documents tells remoteproc driver will load the example firmware into the PRU core.

following are the example firmware provided by PRU-ICSS package

root@phycore-am335x-1:~# ls /lib/firmware/
am335x-pru0-fw am335x-pru1-fw pru

How can I verify whether firmware is loaded ? How can I proceed further with PRU Firmware?

after pruss_remoteproc module is loaded I don’t see any kernel messages.

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

Hi,

Have you seen this training material: processors.wiki.ti.com/.../PRU_Training:_Hands-on_Labs

0 hardik gohil over 7 years ago in reply to Biser Gatchev-XID

Prodigy 180 points

After building the Images following are the example firmware.

root@phycore-am335x-1:~# ls -la /lib/firmware/
drwxr-xr-x 3 root root 368 Apr 28 2016 .
drwxr-xr-x 9 root root 6208 Apr 18 2016 ..
lrwxrwxrwx 1 root root 47 Apr 28 2016 am335x-pru0-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt0.out
lrwxrwxrwx 1 root root 47 Apr 28 2016 am335x-pru1-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt1.out
drwxr-xr-x 2 root root 408 Apr 28 2016 pru

How Can I test this firmware examples as provided by PRU-ICSS package ??

0 hardik gohil over 7 years ago in reply to Biser Gatchev-XID

Prodigy 180 points

Hello,

From this link processors.wiki.ti.com/.../RPMsg_Quick_Start_Guide

I have found how to test those demo examples.
-----------------------------------------------------------------------------------
Write to each of the character devices to test them out

echo "test30" > /dev/rpmsg_pru30
echo "test31" > /dev/rpmsg_pru31
-------------------------------------------------------------------------------------

I cannot find /dev/rpmsg_prux device file in root.

0 Jason Reeder over 7 years ago in reply to hardik gohil

TI__Genius 10415 points

You may need to insert additional modules to get the rpmsg_prux devices to show up. See this archived version of the Hands-on Labs that correspond to the 3.14 kernel that you are using:

Also, can you post the console output that occurs when you insert the pruss_remoteproc.ko module? If it gets inserted during boot then you can remove it (rmmod -f) and then reinsert it (insmod) to see the console output.

Jason Reeder

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PRU Firmware loading and verification