A13 MICRO GPIO table

[MBR]

Hi,

after plaing with A13-OLinuXino-MICRO, I made this table for GPIO programming via sysfs (without SUN4I_GPIO_UGLY enabled).

Index	Name	PIN#	GPIO2
1	pb3	7	11
2	pb4	8	13
3	pb10	9	15
4	pe4	29	26
5	pe5	30	24
6	pe6	31	22
7	pe7	32	20
8	pe8	33	18
9	pe9	34	16
10	pe10	35	14
11	pe11	36	12
12	pg9	37	10
13	pg10	38	8
14	pg11	39	6

Index is the number that you must write to export file to bring up the GPIO directory. Name and PIN# are name and pin number (used elsewhere), GPIO2 is the number of pin in the GPIO2 connector. To bring up all GPIOs, become root, change into /sys/class/gpio and use this shell line:

for i in `seq 1 14` ; do echo $i > export ; done

Note: This will probably cause the green LED to shine dimly, because the LED is connected to gpio12_pg9 and the GPIOs are set as inputs by default.

Only the first and last three (pg* and pg*) support edge triggering. And the last three are used for other things (the green LED and such, see https://www.olimex.com/wiki/A13-OLinuXino).

Other usefull pin on the GPIO2 connector are the pins 2 and 4 - GND, the pin 3 - 3.3V (GPIOs are not 5V tolerant!) and the pin 9 - PIN6/pb2/PWM0, controlled by /sys/class/pwm-sunxi/pwm0.

I hope that this will be usefull to someone.

[Tompai]

Thanks, this was very helpful