*sudo dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=1*  solved the problem. 

On Friday, October 16, 2020 at 4:58:57 PM UTC-4 [email protected] wrote:

> I'm trying to run the pru examples in /var/lib/cloud9 and I am getting 
> this error message. Anyone have any suggestions?
>
> Started /var/lib/cloud9/: neopixelDynamic.pru0.c
> File path: /var/lib/cloud9/BeagleBone/Black/pru
> File: /var/lib/cloud9/BeagleBone/Black/pru/neopixelDynamic.pru0.c
> Arguments: 
> File name: neopixelDynamic.pru0.c
> File extension: c
> File base name: neopixelDynamic.pru0
> Packages: ~.c9/packages
> Project path: /var/lib/cloud9/
> Project name: projectname
> Hostname: localhost
> Hostname path: 
> https://undefined/BeagleBone/Black/pru/neopixelDynamic.pru0.c
> URL: http://localhost
> Port: 8080
> IP: 0.0.0.0
> Command: BeagleBone/Black/pru/neopixelDynamic.pru0.c
> Python: python3
> Python path: 
> /usr/lib/python3.7/dist-packages:/usr/local/lib/python3.7/dist-packages
> /var/lib/cloud9/common/Makefile:27: 
> MODEL=TI_AM335x_BeagleBone_Black,TARGET=neopixelDynamic.pru0,COMMON=/var/lib/cloud9/common
> /var/lib/cloud9/common/Makefile:146: 
> GEN_DIR=/tmp/cloud9-examples,CHIP=am335x,PROC=pru,PRUN=0,PRU_DIR=/dev/remoteproc/pruss-core0,EXE=.out
> -    Stopping PRU 0
> /bin/sh: 1: cannot create /dev/remoteproc/pruss-core0/state: Directory 
> nonexistent
> Cannot stop 0
> CC      neopixelDynamic.pru0.c
> "/var/lib/cloud9/common/prugpio.h", line 55: warning #1181-D: #warning 
> directive: "Found am335x"
> LD      /tmp/cloud9-examples/neopixelDynamic.pru0.o
> -       copying firmware file 
> /tmp/cloud9-examples/neopixelDynamic.pru0.out to 
> /lib/firmware/am335x-pru0-fw
> write_init_pins.sh
> writing "pruout" to "/sys/devices/platform/ocp/ocp:P9_31_pinmux/state"
> -    Starting PRU 0
> /bin/sh: 1: cannot create /dev/remoteproc/pruss-core0/state: Directory 
> nonexistent
> make: *** [/var/lib/cloud9/common/Makefile:166: start] Error 2
> rm /tmp/cloud9-examples/neopixelDynamic.pru0.o
>
>
>
> *debian@beaglebone:/var/lib/cloud9/BeagleBone/Black/pru$ sudo 
> /opt/scripts/tools/version.sh *
> *[sudo] password for debian: *
> *git:/opt/scripts/:[ef16ffa8c27225005cc2b2c974a83da3dee6c1ef]*
> *eeprom:[A335BNLT000C2025BBBG0598]*
> *model:[TI_AM335x_BeagleBone_Black]*
> *dogtag:[BeagleBoard.org Debian Buster IoT Image 2020-08-31]*
> *bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 
> 2019.04-00002-gc9b3922522]:[location: dd MBR]*
> *bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 
> 2019.04-00002-gf15b99f0b6]:[location: dd MBR]*
> *UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]*
> *UBOOT: Loaded Overlay:[BB-ADC-00A0]*
> *UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0]*
> *kernel:[4.19.94-ti-r50]*
> *nodejs:[v10.21.0]*
> */boot/uEnv.txt Settings:*
> *uboot_overlay_options:[enable_uboot_overlays=1]*
> *uboot_overlay_options:[disable_uboot_overlay_video=1]*
>
> *uboot_overlay_options:[uboot_overlay_pru=AM335X-PRU-RPROC-4-19-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]:[4.14.20200814.0-0~buster+20200814]*
> *pkg:[bb-wl18xx-firmware]:[1.20200813.1-0~buster+20200813]*
> *pkg:[kmod]:[26-1]*
> *pkg:[librobotcontrol]:[1.0.5-git20200715.0-0~buster+20200716]*
> *pkg:[firmware-ti-connectivity]:[20190717-2rcnee1~buster+20200305]*
> *groups:[debian : debian adm kmem dialout cdrom floppy audio dip video 
> plugdev users systemd-journal input bluetooth netdev i2c gpio admin spi iio 
> docker tisdk weston-launch xenomai cloud9ide pwm eqep remoteproc]*
> *cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 
> root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M 
> net.ifnames=0 lpj=1990656 rng_core.default_quality=100 quiet]*
> *dmesg | grep remote*
> *[   63.167635] remoteproc remoteproc0: wkup_m3 is available*
> *[   63.236184] remoteproc remoteproc0: powering up wkup_m3*
> *[   63.236216] remoteproc remoteproc0: Booting fw image 
> am335x-pm-firmware.elf, size 217168*
> *[   63.236494] remoteproc remoteproc0: remote processor wkup_m3 is now up*
> *dmesg | grep pru*
> *dmesg | grep pinctrl-single*
> *[    0.926013] pinctrl-single 44e10800.pinmux: 142 pins, size 568*
> *dmesg | grep gpio-of-helper*
> *[    0.939591] gpio-of-helper ocp:cape-universal: ready*
> *lsusb*
> *Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub*
> *END*
> *debian@beaglebone:/var/lib/cloud9/BeagleBone/Black/pru$ *
>
>

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