Hello,
I have successfully configure the PRU and test it (PRU0 and PRU1).
To do so I have used the following DTS :
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-BONE-REPLICAP-00B1.dts
And the example there :
http://exploringbeaglebone.com/chapter13/#prettyPhoto
However, I was thinking that there were may be two many functionality in this DTS that I didn’t want to.
So I decided, to delete all the elements which didn’t disable the PRU.
Finally I arrived with this attached DTS : BB-BONE-CST-CAP-00A0.dts
However I didn’t understand why I should configured DIR_(E,H,X,Y,Z), STEP_(E,H,X,Y,Z), FAULT (E,H,X,Y,Z) ?
And Why should I configured them as GPIO.
In the meantime for example here I didn’t understand the zero after the GPIO number :
stepper_x{ pin-names = "Replic:pru-step_x", "Replic:pru-dir_x"; gpios = <&gpio0 27 0 &gpio1 29 0>; };
In addition for
fault_x { label = "Replic:Fault-X"; debounce_interval = <50>; linux,code = <90>; gpios = <&gpio2 4 0x5>; gpio-key,wakeup; };
I didn’t understand the debounce_interval and the 0x5 value.
So if someone has some explanation about it, or if you have some remark on what I should/shouldn’t delete, I will be pleased to hear about.
Remark :
- Before using this DTS I have tried to use other ones like :
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/uio_pruss_enable-00A0.dts
https://github.com/jadonk/cape-firmware/blob/master/arch/arm/boot/dts/BB-BONE-PRU-01-00A0.dts
but they didn’t allowed me to make the PRU work.
#uname -a Linux beagle01 4.1.21-bone-rt-r20 #1 Wed Apr 6 19:53:34 UTC 2016 armv7l GNU/Linux
BB-BONE-CST-CAP-00A0.dts (7.23 KB)