Advantech SG-1103 Manuel d'utilisateur télécharger pdf (Page 20)

ROM-5420 User Manual 12

3.1.5 GPIO Test

3.1.5.1 ROM-5420 GPIO Default Setting

* GPIO1 & GPIO3 has been reserved for camera input in ROM-5420. You can use

the two GPIO ports if you do not need the camera feature.

#cd /sys/class/gpio

You can use “ls” to list all GPIO devices, and you should also see GPIO ports in

above table.

3.1.5.2 Example of Testing GPIO

A. Set gpio177 GPI (in)

#echo in > ./gpio177/direction

#cat ./gpio177/direction

B. Set gpio178 GPO (out)

#echo out > ./gpio178/direction

#cat ./gpio178/direction

out

C. Set gpio177 GPO value “0”

#echo 0 > ./gpio177/value

D. Get gpio178 value

Note! Please make sure parameter “seek” is equal to 25118 as indicated in

red in above codes. If you create the file to a wrong sector, that may

damage the system.

ROM-DB5900

Linux OS

/sys/class/gpio

Jumper Setting

in ROM-DB5900

GPIO0 gpio1 CN24(1-2)

*GPIO1 - CN26(2-3)CAM1_PWR#

GPIO2 gpio4 CN27(1-2)

*GPIO3 - CN28(2-3)CAM1_RST#

GPIO4 gpio205 CN30(1-2)

GPIO5 gpio21 CN31(1-2)

GPIO6 gpio198 CN32(1-2)

GPIO7 gpio199 CN35(1-2)

GPIO8 gpio193 CN34(1-2)

GPIO9 gpio192 CN26(1-2)

GPIO10 gpio178

GPIO11 gpio177

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 53 54

Pas de commentaire

Advantech SG-1103 Manuel d'utilisateur Page 20