Thank you, Filippo! It was the exact same issue you mentioned in your post. I tried your solution and it worked like charm.
However, I have one more question. I actually tried to start the PRU using "sudo echo 'start' > /sys/class/remoteproc/remoteproc1/state" and it always failed with error "Permission denied", while in your case, you used sudo sh -c "echo ... Is there any significant difference between the two syntax? On Monday, September 24, 2018 at 10:59:29 PM UTC+8, Filippo Guerzoni wrote: > > Pleae have a look at > https://groups.google.com/d/topic/beagleboard/b8W1W3z_xYA/discussion > regards > > > > Il giorno lunedì 24 settembre 2018 16:54:04 UTC+2, Wei Shi ha scritto: >> >> Hi, I'm trying to bring up the PRU on my BeagleBone Black. I was able to >> get it up using UIO method, but failed with PRU_RPROC driver. >> >> The pru-software-support-package example compiled OK. I tried >> PRU_Direct_Connect0 >> and PRU_RPMsg_Echo_Interrupt1. I copied generated .out file to >> /lib/firmware. BTW, there was conflicting instructions online about how to >> place the .out file. One mentioned copying to FILE >> /lib/firmware/am335x-pru0(1)-fw, >> and another mentioned copy to under DIRECTORY >> /lib/firmware/am335x-pru0(1)-fw/. >> I tried both, and both failed with the same symptom. >> >> I have the following output in dmesg, and it looks as if PRU_RPROC have >> not even tried to load the .out file. >> >> [ 77.864792] pruss 4a300000.pruss: creating PRU cores and other child >> platform devices >> [ 77.934664] remoteproc remoteproc1: 4a334000.pru is available >> [ 77.934794] pru-rproc 4a334000.pru: PRU rproc node >> /ocp/pruss_soc_bus@4a326004/pruss@0/pru@34000 probed successfully >> [ 77.936497] remoteproc remoteproc2: 4a338000.pru is available >> [ 77.936603] pru-rproc 4a338000.pru: PRU rproc node >> /ocp/pruss_soc_bus@4a326004/pruss@0/pru@38000 probed successfully >> >> >> The state file under /sys/class/remoteproc/remoteproc2 is showing "offline" >> >> >> my uEnv.txt file is below: >> >> >> uname_r=4.14.69-ti-r76 >> >> enable_uboot_overlays=1 >> >> uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo >> >> enable_uboot_cape_universal=1 >> >> >> And the configuration is: >> >> >> git:/opt/scripts/:[d837f2b02f44fabe16353fd1226bb1f64e847c93] >> eeprom:[A335BNLT00C02318BBBK19D2] >> model:[TI_AM335x_BeagleBone_Black] >> dogtag:[BeagleBoard.org Debian Image 2018-08-30] >> bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot >> 2018.09-00002-g0b54a51eee]:[location: dd MBR] >> kernel:[4.14.69-ti-r76] >> nodejs:[v6.14.4] >> uboot_overlay_options:[enable_uboot_overlays=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]:[4.4.20180914.0-0rcnee0~stretch+20180914] >> pkg:[bb-wl18xx-firmware]:[1.20180517-0rcnee0~stretch+20180517] >> pkg:[kmod]:[23-2rcnee1~stretch+20171005] >> pkg:[librobotcontrol]:[1.0.2-git20180829.0-0rcnee0~stretch+20180830] >> 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 >> [ 1.120938] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size >> 568 >> dmesg | grep gpio-of-helper >> [ 1.132957] gpio-of-helper ocp:cape-universal: ready >> END >> >> >> Did I miss anything? Any help is really appreciated. >> >> >> Wei >> >> >> -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/b1674a4f-7ca7-4edf-af07-887c9e141b47%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
