Differences

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--- test [2021/10/06 11:15] – [Encoders] ursgraf
+++ test [2026/05/20 11:35] (current) – ursgraf
@@ Line 13: / Line 13: @@
 ==== Encoders ====
-ssh into the BeagleBone blue board and run:
+Enable the counters with:
 <code>
-ost@bblue:$ sudo rc_test_encoders
+ost@bblue:$ echo 1 | sudo tee /sys/bus/counter/devices/counter1/count0/enable
+ost@bblue:$ echo 1 | sudo tee /sys/bus/counter/devices/counter2/count0/enable
+ost@bblue:$ echo 1 | sudo tee /sys/bus/counter/devices/counter3/count0/enable
 </code>
-If you move the axis you should see encoder values changing.
+The counter0 does not have to be enabled. Then watch the counters with
-==== LEDs and buttons ====
-Next we want to check if all leds and buttons work as desired. Change to root mode
 <code>
-ost@bblue:$ su
+ost@bblue:$ watch -n 0.5 cat /sys/bus/counter/devices/counter0/count0/count
+ost@bblue:$ watch -n 0.5 cat /sys/bus/counter/devices/counter1/count0/count
+ost@bblue:$ watch -n 0.5 cat /sys/bus/counter/devices/counter2/count0/count
+ost@bblue:$ watch -n 0.5 cat /sys/bus/counter/devices/counter3/count0/count
 </code>
-The password is "root". Change into
+If you move the axis you should see counter values changing.
+==== LEDs and buttons ====
+Next we want to check if all leds and buttons work as desired.
+The blue led should light up on pin GPIO3_2 with
 <code>
-root@bblue:$ cd /sys/class/gpio
+ost@bblue:$ sudo gpioset -c gpiochip2 2=1
 </code>
-and add the pins involved to the gpio array with
+Do the same with the red led on pin GPIO1_17
 <code>
-root@bblue:$ echo 49 > export
+ost@bblue:$ sudo gpioset -c gpiochip0 17=1
-root@bblue:$ echo 57 > export
-root@bblue:$ echo 97 > export
-root@bblue:$ echo 98 > export
-root@bblue:$ echo 113 > export
-root@bblue:$ echo 116 > export
 </code>
-The blue led should light up with
+And the green led on pin GPIO3_20
 <code>
-root@bblue:$ echo out > gpio98/direction
+ost@bblue:$ sudo gpioset -c gpiochip2 20=1
-root@bblue:$ echo 1 > gpio98/value
-</code>
-and stop lighting with
-<code>
-root@bblue:$ echo 0 > gpio98/value
-</code>
-Do the same with the red led
-<code>
-root@bblue:$ echo out > gpio49/direction
-root@bblue:$ echo 1 > gpio49/value
-root@bblue:$ echo 0 > gpio49/value
-</code>
-And the green led
-<code>
-root@bblue:$ echo out > gpio116/direction
-root@bblue:$ echo 1 > gpio116/value
-root@bblue:$ echo 0 > gpio116/value
 </code>
 Read the state of the blue button with
 <code>
-root@bblue:$ echo in > gpio97/direction
+ost@bblue:$ sudo gpioget -c gpiochip2 1
-root@bblue:$ cat gpio97/value
 </code>
-Repeat the last command with the button pressed. Do the same with the red button
+When the button is pressed it will return //"1"=active//, //"1"=inactive// otherwise. Do the same with the red button
 <code>
-root@bblue:$ echo in > gpio57/direction
+ost@bblue:$ sudo gpioget -c gpiochip0 25
-root@bblue:$ cat gpio57/value
 </code>
 And the green button
 <code>
-root@bblue:$ echo in > gpio113/direction
+ost@bblue:$ sudo gpioget -c gpiochip2 17
-root@bblue:$ cat gpio113/value
-</code>
-Exit root mode with
-<code>
-root@bblue:$ exit
 </code>