Hello,
I’ve been playing with this Beaglebone Black Wireless for several months now, and I feel like I’ve come pretty far from out-right newbie status, but after struggling for so long to program one of the BBBW’s PRUs I’m starting to feel like a newbie again. Please help!
I’ve been following this tutorial - http://credentiality2.blogspot.com/2015/09/beaglebone-pru-gpio-example.html - mostly because it makes intuitive sense to me.
It says that to program the PRU, you have to use a device tree overlay to set up the gpios pins and their configuration for the PRU to be able to use them, then you have to write a .c program to load assembly code into the PRU after you compile it into .bin with ./pasm. This all seems relatively simple, and I’ve been able to get everything to compile and I can load my overlay into /sys/devices/platform/bone_capemgr/slots with no issues. But as soon as I try to load my compiled assembly code into the PRU with:
“./pru_loader pru_gpio_test.bin” - as instructed by the tutorial
I get the error “prussdrv_open() failed”
Can anyone help me please?? I’m so stuck and I’m not finding information on existing threads that works for me.
my uname -a read out is:
Linux beaglebone 4.9.45-ti-r57 #1 SMP PREEMPT Fri Aug 25 22:58:38 UTC 2017 armv7l GNU/Linux
when I run lsmod |grep pru :
pruss_soc_bus 4788 0
pru_rproc 14966 0
pruss_intc 9092 1 pru_rproc
pruss 10889 1 pru_rproc
I haven’t altered the pru_loader.c code at all from what is shown on the tutorial page, and I only made minor adjustments to the .dts file and assembly code. I will provide those if it helps.
Thank you for reading! Please get back to me soon!
evangrcarter@gmail.com