Hi vinicius. First of all, thanks for the reply and for indicating me PRU cook book. Regarding dmesg messages, yes, I've checked them (as shown below). It seems PRUs are available for use, am I right? What do you recommend as a hello world test for PRU?
--------------------- [ 11.169923] remoteproc remoteproc0: 4a334000.pru is available [ 11.171927] remoteproc remoteproc1: 4a338000.pru is available [ 60.948771] remoteproc remoteproc2: wkup_m3 is available [ 60.956133] remoteproc remoteproc2: powering up wkup_m3 [ 60.956160] remoteproc remoteproc2: Booting fw image am335x-pm-firmware.elf, size 217168 [ 60.956412] remoteproc remoteproc2: remote processor wkup_m3 is now up [ 454.023370] remoteproc remoteproc1: powering up 4a338000.pru [ 454.027965] remoteproc remoteproc1: loading /lib/firmware/am335x-pru1-fw failed with error -22 [ 454.027986] remoteproc remoteproc1: Direct firmware load for am335x-pru1-fw failed with error -22 [ 454.028006] remoteproc remoteproc1: request_firmware failed: -22 [ 454.043116] remoteproc remoteproc1: Boot failed: -22 --------------------- Best Regards, Pedro Bertoleti Em sábado, 16 de janeiro de 2021 às 23:05:07 UTC-4, [email protected] escreveu: > Hi Pedro, > > I recommend you take a look at > https://markayoder.github.io/PRUCookbook/ > > Have you checked the dmesg to see what is happening at kernel level ? > > Em sáb., 16 de jan. de 2021 às 23:25, phfbertoleti <[email protected]> > escreveu: > >> Hi everyone. >> >> My name is Pedro and I'm from Brazil. I'm trying to learn how to use PRUs >> in BeagleBone (I'm using BeagleBone Green Wireless now) and I'm facing a >> problem I cannot solve. >> >> I'm reading Derek Molloy's book (Exploring BeagleBone) and one of the >> first examples / "hello world"-like is checking which firmware is loaded in >> PRU0 and start it. However, when I try to do this, I get "write error: >> Invalid argument" as error output: >> >> debian@beaglebone:/sys/class/remoteproc/remoteproc1$ cat firmware >> am335x-pru1-fw >> debian@beaglebone:/sys/class/remoteproc/remoteproc1$ echo 'start' > state >> -bash: echo: write error: Invalid argument >> >> What am I doing wrong? I would like to see "running" at state value, in >> order to be sure PRU0 is working. >> >> Here follows some useful information: >> >> Kernel version: 4.19.94-ti-r42 >> Dmesg output related to remoteproc: >> >> --------------------- >> [ 11.169923] remoteproc remoteproc0: 4a334000.pru is available >> [ 11.171927] remoteproc remoteproc1: 4a338000.pru is available >> [ 60.948771] remoteproc remoteproc2: wkup_m3 is available >> [ 60.956133] remoteproc remoteproc2: powering up wkup_m3 >> [ 60.956160] remoteproc remoteproc2: Booting fw image >> am335x-pm-firmware.elf, size 217168 >> [ 60.956412] remoteproc remoteproc2: remote processor wkup_m3 is now up >> [ 454.023370] remoteproc remoteproc1: powering up 4a338000.pru >> [ 454.027965] remoteproc remoteproc1: loading >> /lib/firmware/am335x-pru1-fw failed with error -22 >> [ 454.027986] remoteproc remoteproc1: Direct firmware load for >> am335x-pru1-fw failed with error -22 >> [ 454.028006] remoteproc remoteproc1: request_firmware failed: -22 >> [ 454.043116] remoteproc remoteproc1: Boot failed: -22 >> --------------------- >> >> Thanks in advance. >> >> Best Regards, >> Pedro Bertoleti >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/7c2be7bd-63f3-4798-85dd-e5be63d86831n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/7c2be7bd-63f3-4798-85dd-e5be63d86831n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/8e94c2a0-287a-4c6c-8342-87a7f6a9fcabn%40googlegroups.com.
