Advantech RSB-3710, User Manual

Page: 40 / 60

RSB-3710 User Manual 32
To build system image
Enter the following command into the terminal console:
All android images are generated in rockdev/Image- rk3399_rsb3710/ folder.
Common image files are listed below:
3.3 GPIO
Export GPIO then use control GPIO from user space through sysfs.
Export GPIO1.
Set GPIO direction to in/out.
$ source build/envsetup.sh
$ lunch rk3399_rsb3710-userdebug
$ make -j4 2>&1 | tee build-log.txt
$./mkimage.sh
# boot.img : Android's initramfs, to initialize and mount system partition.
# kernel.img : Kernel image.
# misc.img : Misc partition image, to switch boot mode and pass parameter in recovery
mode.
# recovery.img : Recovery mode image.
# resource.img : Resource image, containing boot logo and kernel's device tree info.
# system.img : System partition image with ext4 filesystem format.
# uboot.img : uboot
# trust.img : File about sleep
# MiniLoaderAll.bin : Loader
GPIO Number GPIO formed Numeric Representation
#
GPIO1 EXP1_0
504
#
GPIO2 EXP1_1
505
#
GPIO3 EXP1_2
506
#
GPIO4 EXP1_3
507
#
GPIO5 EXP2_0
496
#
GPIO6 EXP2_1
497
#
GPIO7 EXP2_2
498
#
GPIO8 EXP2_3
499
#
GPIO9 EXP2_4
500
#
GPIO10 EXP2_5
501
#
GPIO11 EXP2_6
502
#
GPIO12 EXP2_7
503
$ echo 504 > /sys/class/gpio/export
$ echo "out" > /sys/class/gpio/gpio504/direction