Please see the following table for the translation from baseboard pin to CPU pin:
Under Linux you can use sysfs to access gpios.
To get access to an GPIO pin, first, write the GPIO number to /sys/class/gpio/export
echo 83 [gt] /sys/class/gpio/export
Now you should find a directory in /sys/class/gpio to access your GPIO pin. Write ‘in’ or ‘out’ to the direction to change the direction of the pin:
echo out [gt] /sys/class/gpio/GPIO0/direction
The value (0 for off, 1 for on) of the pin is in the value file. To read or change it, read the file or write to it.
echo 1 [gt] /sys/class/gpio/GPIO0/value
cat /sys/class/gpio/GPIO0/value
The list of GPIO numbers can be found below.
Verno 3/Verno 4/Cadun
There are 10 GPIOs on J12 with a signal level of 3.3V and 14 more on J16 via an GPIO expander.
Connector | Pin | Signal | Signal on RZ/A1H | Port and pin | GPIO Number |
---|---|---|---|---|---|
J12 | 4 | GPIO_0 | GPIO0 | 6-3 | 83 |
J12 | 6 | GPIO_1 | GPIO1 | 6-4 | 84 |
J12 | 8 | GPIO_2 | GPIO2 | 4-0 | 54 |
J12 | 10 | GPIO_3 | GPIO3 | 4-1 | 55 |
J12 | 12 | GPIO_4 | GPIO4 | 4-2 | 56 |
J12 | 14 | GPIO_5 | GPIO5 | 4-3 | 57 |
J12 | 16 | GPIO_6 | GPIO6 | 11-12 | 165 |
J12 | 18 | GPIO_7 | GPIO7 | 11-13 |
166 |
J12 | 20 | GPIO_8 | GPIO8 | 11-14 |
167 |
J12 | 22 | GPIO_9 | GPIO9 | 11-15 |
168 |