GPIOs on emCON-MX6 under Linux

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 34 > /sys/class/gpio/export

Now you should find a directory in /sys/class/gpio to access your GPIO pin. Write in or out to direction to change the direction of the pin:

echo out > /sys/class/gpio/gpio34/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 > /sys/class/gpio/gpio34/valuecat /sys/class/gpio/gpio34/value

The list of GPIO numbers can be found below.

Avari

There are 8 GPIOs on J27 with a signal level of 3.3V.

Connector	Pin	Signal	Signal on MX6	Bank and pin	GPIO Number
J27	8	GPIO_1	GPIO_1	2-0	32
J27	10	GPIO_2	GPIO_2	2-1	33
J27	12	GPIO_3	GPIO_3	2-2	34
J27	14	GPIO_4	GPIO_4	2-3	35
J27	16	GPIO_5	GPIO_5	2-4	36
J27	18	GPIO_6	GPIO_6	2-5	37
J27	20	GPIO_7	GPIO_7	2-6	38
J27	22	GPIO_8	GPIO_8	2-7	39

There are 8 GPIOs on J14 with a signal level of 3.3V.

Connector	Pin	Signal	Signal on MX6	Bank and pin	GPIO Number
J14	8	GPIO_1	GPIO_1	2-0	32
J14	10	GPIO_2	GPIO_2	2-1	33
J14	12	GPIO_3	GPIO_3	2-2	34
J14	14	GPIO_4	GPIO_4	2-3	35
J14	16	GPIO_5	GPIO_5	2-4	36
J14	18	GPIO_6	GPIO_6	2-5	37
J14	20	GPIO_7	GPIO_7	2-6	38
J14	22	GPIO_8	GPIO_8	2-7	39