Control LED by GPIO

Technical Support
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1

How to control LED by GPIO on Apalis Evaluation Board?

2

Which operating system do you use?

3

i am using Linux

4

actually i want to control on board LED by gpio but not getting which led connected to which gpio

5

Hi

The LEDs are not connected to any Apalis pin. You will have to use jumper cables.

Please have a look at the Apalis Evaluation Board schematic.

Max

6

Hello sir,
i have connected jumpers also to from gpio1 which is on X4 connnector and led connector which is on X34 and i have type following commands

echo "1" > /sys/class/gpio/export                  
echo "out" > /sys/class/gpio/gpio1direction
echo "1" > /sys/class/gpio/gpio1/value

but still led on get on

7

Please have a look at this as well and remember to pay attention to the mapping between the various pin names/numbers.

8

Which module do you use? Are you really referring to GPIO1? Please have a look at the Apalis Evaluation Board Schematics to confirm which MXM3 pin you refer to and then have a look at the Section 4.4 of the Apalis iMX6 datasheet for the corresponding GPIO number, assuming you are using iMX6 module.

GPIO1 would be GPIO1_IO01, see here which would be MXM3_4 and is used by PWM for default.

9

i am using this pin MXM3_1 A10 B10 X38-106 GPIO_1
is it gpio1??

10

No, please refer to the thread I linked to in my below answer.