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/CAB6xwCr%3Dp4scjdqz07WRFdX8f6SDfhTsaV3axENmgxa96zW3dQ%40mail.gmail.com.
