reptile
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reptile got a reaction from rusatch in Trigger LED on Orange PI Zero Plusok, 2nd day and starting to better understand this, will explain it loudly for myself and anyone else:
Though the answer was there from the beginning, too bad that it wasn't clear for meL
http://linux-sunxi.org/GPIO
First we need to "create" or "attach" the GPIO port using this command:
sudo echo XX > /sys/class/gpio/export The XX is a complex calculation of the GPIO:
so for Orange PI Zero plus 2 H5 (should be same for h3/h2) the RED led would on GPIO PA17 and GREEN LED on GPIO PL10 (Info from here: http://linux-sunxi.org/Xunlong_Orange_Pi_Zero_Plus_2 )
The calculation would be (Letter A is 1, the "P" not counted): (1 -0) * 32 + 17 = 17 (For RED LED) while for Green LED: (12 - 1) * 32 + 10 = 362
sudo echo 362 > /sys/class/gpio/export sudo echo 17 > /sys/class/gpio/export
Now lets check the status of the GPIOs:
cat /sys/kernel/debug/gpio gpiochip1: GPIOs 0-223, parent: platform/1c20800.pinctrl, 1c20800.pinctrl: gpio-9 ( |reset ) out hi gpio-14 ( |sysfs ) out hi gpio-17 ( |sysfs ) in lo gpio-110 ( |sysfs ) in lo gpio-166 ( |cd ) in hi IRQ gpio-204 ( |usb0_id_det ) in lo IRQ gpiochip0: GPIOs 352-383, parent: platform/1f02c00.pinctrl, 1f02c00.pinctrl: gpio-358 ( |? ) out lo gpio-362 ( |sysfs ) in lo
The GPIOs should be "out" direction (i guess because we are outputting to it), so lets fix them:
sudo echo out > /sys/class/gpio/gpio362/direction sudo echo out > /sys/class/gpio/gpio17/direction
Now that the direction is correct, lets try to switch them on or off:
sudo echo 1 > /sys/class/gpio/gpio362/value sudo echo 0 > /sys/class/gpio/gpio362/value sudo echo 1 > /sys/class/gpio/gpio17/value sudo echo 0 > /sys/class/gpio/gpio17/value
Now that the LEDs are controllable, The next challenge would be adding some rhythm to the led per hardware occasions such as heart beet, read/write.. i hope it will be easier than above
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reptile got a reaction from pfeerick in orange pi zero ledI was wondering about the same and i answered it here:
For anyone landing here and can't find answer..
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reptile got a reaction from pfeerick in Trigger LED on Orange PI Zero Plusok, 2nd day and starting to better understand this, will explain it loudly for myself and anyone else:
Though the answer was there from the beginning, too bad that it wasn't clear for meL
http://linux-sunxi.org/GPIO
First we need to "create" or "attach" the GPIO port using this command:
sudo echo XX > /sys/class/gpio/export The XX is a complex calculation of the GPIO:
so for Orange PI Zero plus 2 H5 (should be same for h3/h2) the RED led would on GPIO PA17 and GREEN LED on GPIO PL10 (Info from here: http://linux-sunxi.org/Xunlong_Orange_Pi_Zero_Plus_2 )
The calculation would be (Letter A is 1, the "P" not counted): (1 -0) * 32 + 17 = 17 (For RED LED) while for Green LED: (12 - 1) * 32 + 10 = 362
sudo echo 362 > /sys/class/gpio/export sudo echo 17 > /sys/class/gpio/export
Now lets check the status of the GPIOs:
cat /sys/kernel/debug/gpio gpiochip1: GPIOs 0-223, parent: platform/1c20800.pinctrl, 1c20800.pinctrl: gpio-9 ( |reset ) out hi gpio-14 ( |sysfs ) out hi gpio-17 ( |sysfs ) in lo gpio-110 ( |sysfs ) in lo gpio-166 ( |cd ) in hi IRQ gpio-204 ( |usb0_id_det ) in lo IRQ gpiochip0: GPIOs 352-383, parent: platform/1f02c00.pinctrl, 1f02c00.pinctrl: gpio-358 ( |? ) out lo gpio-362 ( |sysfs ) in lo
The GPIOs should be "out" direction (i guess because we are outputting to it), so lets fix them:
sudo echo out > /sys/class/gpio/gpio362/direction sudo echo out > /sys/class/gpio/gpio17/direction
Now that the direction is correct, lets try to switch them on or off:
sudo echo 1 > /sys/class/gpio/gpio362/value sudo echo 0 > /sys/class/gpio/gpio362/value sudo echo 1 > /sys/class/gpio/gpio17/value sudo echo 0 > /sys/class/gpio/gpio17/value
Now that the LEDs are controllable, The next challenge would be adding some rhythm to the led per hardware occasions such as heart beet, read/write.. i hope it will be easier than above
