User's Manual

FCC ID: 2ACHTQ7S
10
3-3 GPIO_DEMO Interface
3-3-1 GpioJni Demo as shown below
3-3-2 The file system path of the gpio port corresponding device node folder.
GPIO Interface
Yellow
Red
White
Green
Black
IN/OUT
Input 1
Input 2
Output 1
Output 2
GND
GpioJniDemo
Gpio14
Gpio58
Gpio68
Gpio88
The path of the Gpio68 node in the folder is: /sys/class/gpio/gpio979/
The path of the Gpio58 node in the folder is: /sys/class/gpio/gpio969/
The path of the Gpio88 node in the folder is: /sys/class/gpio/gpio999/
The path of the Gpio14 node in the folder is: /sys/class/gpio/gpio925/
3-3-3. How to read or set the value of gpio port.
READ: Read the value directly within the device node folder, function is asfollows, please refer to the usage
within demo for more details.
public String gpioReadStateOne(String state)
Read the data: ON ----the gpio port input is low level
OFF----the gpio port input is high level
SETTING: Write the value directly within the device node folder, function is asfollows, please refer to the
usage within demo for more details.
public boolean gpioSetStateOne(String name, int state)
Set a value: ON----set the gpio port output as high level
OFF---set the gpio port output as low level
GPIO：Input Voltage range: 0-3.3V ; output Voltage range:0-3.3V
3-4 ACC
3-4-1 ACC Connection Instruction：
connecting the tablet with vehicle power supply through extended cable or docking station, and
connecting ACC wire on extended cable of the tablet with ACC of vehicle.
ACC wire：