Xingxing.li: Created page with " The RK3568 bank/bit notation for GPIOs must be formed as “GPIO_”.
The numeric value of GPIO is calculated as follows:
32 x (gpio_bank..."

2023-12-05T05:26:35Z

Created page with " The RK3568 bank/bit notation for GPIOs must be formed as “GPIO<GPIO_ bank>_<gpio_bit>”. The numeric value of GPIO is calculated as follows: 32 x (gpio_bank..."

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The RK3568 bank/bit notation for GPIOs must be formed as “GPIO<GPIO_ bank>_<gpio_bit>”. The numeric value of GPIO is calculated as follows: 32 x (gpio_bank) + gpio_bit gpio_bit: A0~A7 0-7 B0~B7 8-15 C0~C7 16-23 D0~D7 24-31 E.g. GPIO2_D0 becomes 88

'''ROM-5880 GPIO'''

[[File:ROM-5880 GPIO.png]]

'''SOM-DB2510 GPIO Pin header：'''

[[File:SOM-DB2510 CN9.PNG]]

Export GPIO then you can use control GPIO from user space through sysfs. Export GPIO
<pre># echo 88 > /sys/class/gpio/export</pre>

Set GPIO direction to in/out
<pre># echo "out" > /sys/class/gpio/gpio88/direction</pre>

Set GPIO value 0/1 if GPIO pin define is output
<pre># echo 1 > /sys/class/gpio/gpio88/value</pre>

Used as IRQ signal
<pre># echo "rising" > /sys/class/gpio/gpio88/edge</pre>

NOTE: You have to configure GPIO to input. rising: Trigger on rising edge falling: Trigger on falling edge both: Trigger on both edges none: Disable interrupt on both edges

Unexport GPIO
<pre># echo 88 > /sys/class/gpio/unexport</pre>

GPIO0 and GPIO1 are taken as an example: Connect GPIO0 and GPIO1

Export GPIO0 and GPIO1
<pre># echo 88 > /sys/class/gpio/export
# echo 89 > /sys/class/gpio/export</pre>

Set GPIO0 to output and GPIO1 to input
<pre># echo "out" > /sys/class/gpio/gpio88/direction
# echo "in" > /sys/class/gpio/gpio89/direction</pre>

Change GPIO0 to 1 and read GPIO1 value
<pre># echo 1 > /sys/class/gpio/gpio88/value
# cat /sys/class/gpio/gpio89/value
1</pre>

Change GPIO0 to 0 and read GPIO2 value
<pre># echo 0 > /sys/class/gpio/gpio88/value
# cat /sys/class/gpio/gpio89/value
0</pre>

GPIO（ROM-5880） - Revision history

Xingxing.li: Created page with " The RK3568 bank/bit notation for GPIOs must be formed as “GPIO_”. The numeric value of GPIO is calculated as follows: 32 x (gpio_bank..."

Xingxing.li: Created page with " The RK3568 bank/bit notation for GPIOs must be formed as “GPIO_”.
The numeric value of GPIO is calculated as follows:
32 x (gpio_bank..."