teknoman117 / beaglebot Goto Github PK

I am trying to read my encoder (below) using my BBB
Encoder part #: (https://www.dfrobot.com/wiki/index.php/12V_DC_Motor_251rpm_w/Encoder_(SKU:_FIT0186))

Connections: Green to ground (P8.2), Blue to VDD5V (P9.5), Yellow to P8.12, and White to P8.11.
The diagram for these colors are at the above link

I have the dtbo files in the right location:

root@arm:/lib/firmware# ls -ltr bone*
-rw-r--r-- 1 root root 1082 Dec  7 01:09 bone_eqep0-00A0.dtbo
-rw-r--r-- 1 root root 1098 Dec  7 01:09 bone_eqep1-00A0.dtbo
-rw-r--r-- 1 root root 1098 Dec  7 01:09 bone_eqep2-00A0.dtbo
-rw-r--r-- 1 root root 1096 Dec  7 18:27 bone_eqep2b-00A0.dtbo

There is no 'slots' file as can be seen below

root@arm:/lib/firmware# uname -r
4.9.54-ti-r68
root@arm:/sys/devices/platform/bone_capemgr# ls -ltr
total 0
-rw-r--r-- 1 root root 4096 Dec  7 18:05 uevent
lrwxrwxrwx 1 root root    0 Dec  7 18:05 subsystem -> ../../../bus/platform
lrwxrwxrwx 1 root root    0 Dec  7 18:42 driver -> ../../../bus/platform/drivers/bone_capemgr
drwxr-xr-x 2 root root    0 Dec  7 18:42 power
lrwxrwxrwx 1 root root    0 Dec  7 18:42 of_node -> ../../../firmware/devicetree/base/bone_capemgr
-r--r--r-- 1 root root 4096 Dec  7 18:42 modalias
-rw-r--r-- 1 root root 4096 Dec  7 18:42 driver_override
root@arm:/sys/devices/platform/bone_capemgr# ls -ltr *slots*
ls: cannot access '*slots*': No such file or directory

How do I load the right overlays with Uboot enabled? (I need Uboot for running a motor through a cape) @pdp7 @teknoman117

I think the new bone_eqep2b.dts that was added has incorrect comments.
The author updated the P8 pin numbers, but not the GPIO numbers, therefore they are not correct. Thx! ( I would try to fix it, but I am new to Github and I dont know how)...

Hello there,
I am build an application using BeagleBone Black where I need to read the position from 2 encoders on 2 motors. I have 2 question regarding your api:

• One of my encoder gives back quadrature signal only on 1 pin, not 2. I have seen in the MCU datasheet that there is a mode in eQEP that allows this. Can it be also configured using your API?
• Is there a way to get an interrupt in userspace application that position has been reached, or I need to check the counter in a loop?

I would aprichiate any help.

After exactly 1020 position reads the position stops updating