PRU does not start.

[gw]

Hello.

I need help regarding PRU.

I tried to enable the PRU by a command below.

root@beaglebone:/sys/class/remoteproc/remoteproc1# echo 'start' > state         

-bash: echo: write error: No such file or directory

But I get above result and PRU does not start.

I also tried sudo sh -c "echo 'start' > state" but I got an I/O error.

Please help me.

Below are related information.

debian@beaglebone:~$ dmesg |grep pru

[   82.512558] pruss 4a300000.pruss: creating PRU cores and other child platform devices

[   82.531307] remoteproc remoteproc1: 4a334000.pru is available

[   82.531436] pru-rproc 4a334000.pru: PRU rproc node /ocp/pruss_soc_bus@4a326004/pruss@0/pru@34000 probed successfully

[   82.539513] remoteproc remoteproc2: 4a338000.pru is available

[   82.539647] pru-rproc 4a338000.pru: PRU rproc node /ocp/pruss_soc_bus@4a32600

[ 1864.134156] remoteproc remoteproc1: powering up 4a334000.pru

[ 1864.134336] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

root@beaglebone:/sys/class/remoteproc/remoteproc1# sudo /opt/scripts/tools/version.sh

git:/opt/scripts/:[1aa73453b2c980b75e31e83dab7dd8b6696f10c7]

eeprom:[A335BNLTBWA51712EW004500]

model:[TI_AM335x_BeagleBone_Black_Wireless]

dogtag:[BeagleBoard.org Debian Image 2018-10-07]

bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2018.09-00002-g0b54a51eee]:[location: dd MBR]

kernel:[4.14.71-ti-r80]

nodejs:[v6.14.4]

uboot_overlay_options:[enable_uboot_overlays=1]

uboot_overlay_options:[disable_uboot_overlay_video=1]

uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo]

uboot_overlay_options:[enable_uboot_cape_universal=1]

pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]

pkg:[bb-cape-overlays]:[4.4.20180928.0-0rcnee0~stretch+20180928]

pkg:[bb-wl18xx-firmware]:[1.20180517-0rcnee0~stretch+20180517]

pkg:[kmod]:[23-2rcnee1~stretch+20171005]

pkg:[librobotcontrol]:[1.0.3-git20181005.0-0rcnee0~stretch+20181005]

pkg:[firmware-ti-connectivity]:[20170823-1rcnee1~stretch+20180328]

groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal i2c bluetooth netdev cloud9ide gpio pwm eqep admin spi tisdk weston-launch xenomai]

cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet]

dmesg | grep pinctrl-single

[    1.115968] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568

dmesg | grep gpio-of-helper

[    1.127852] gpio-of-helper ocp:cape-universal: ready

END

[Dan Julio]

Your PRU isn't running code so remoteproc has nothing to control.  Either the firmware file is missing from /lib/firmware or it isn't valid code.

[din...@gmail.com]

Could you post the output of "dmesg | tail -40" so that we can see the other remoteproc related kernel messages?

Are you by any chance using pru-gcc? If yes, you would need to upgrade your kernel to 4.14.94-ti-r96 . If you are using clpru then you should be fine.

Regards,

Dimitar

[are...@yahoo.com]

I'm having the same issue and wondering if this was resolved?  I'm getting the exact same error message when trying to start and here is  my tail of  dmesg

[   86.179253] pruss 4a300000.pruss: creating PRU cores and other child platform devices

[   86.211623] remoteproc remoteproc1: 4a334000.pru is available

[   86.211753] pru-rproc 4a334000.pru: PRU rproc node /ocp/pruss_soc_bus@4a326004/pruss@0/pru@34000 probed successfully

[   86.219632] remoteproc remoteproc2: 4a338000.pru is available

[   86.219765] pru-rproc 4a338000.pru: PRU rproc node /ocp/pruss_soc_bus@4a326004/pruss@0/pru@38000 probed successfully

[  112.609040] remoteproc remoteproc1: powering up 4a334000.pru

[  112.614874] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  112.614903] remoteproc remoteproc1: request_firmware failed: -2

[  112.624747] remoteproc remoteproc1: Boot failed: -2

[  120.185318] remoteproc remoteproc1: powering up 4a334000.pru

[  120.185412] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  120.185431] remoteproc remoteproc1: request_firmware failed: -2

[  120.197453] remoteproc remoteproc1: Boot failed: -2

[  140.249570] remoteproc remoteproc1: powering up 4a334000.pru

[  140.249661] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  140.249678] remoteproc remoteproc1: request_firmware failed: -2

[  140.262930] remoteproc remoteproc1: Boot failed: -2

[  189.299778] remoteproc remoteproc1: powering up 4a334000.pru

[  189.299866] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  189.299884] remoteproc remoteproc1: request_firmware failed: -2

[  189.311901] remoteproc remoteproc1: Boot failed: -2

[  351.346600] remoteproc remoteproc1: powering up 4a334000.pru

[  351.346699] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  351.346716] remoteproc remoteproc1: request_firmware failed: -2

[  351.357944] remoteproc remoteproc1: Boot failed: -2

[  376.604021] remoteproc remoteproc1: powering up 4a334000.pru

[  376.604110] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  376.604128] remoteproc remoteproc1: request_firmware failed: -2

[  376.615227] remoteproc remoteproc1: Boot failed: -2

[  414.102771] remoteproc remoteproc1: powering up 4a334000.pru

[  414.102862] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  414.102879] remoteproc remoteproc1: request_firmware failed: -2

[  414.113818] remoteproc remoteproc1: Boot failed: -2

[  620.182892] remoteproc remoteproc1: powering up 4a334000.pru

[  620.182982] remoteproc remoteproc1: Direct firmware load for am335x-pru0-fw failed with error -2

[  620.183003] remoteproc remoteproc1: request_firmware failed: -2

[  620.193899] remoteproc remoteproc1: Boot failed: -2

Following the setup exactly in Exploring BBB D Molloy chp15