Acrosser AIV-HM76V1FL - Manual (Page 47)

AIV-HM76V1FL Series User Manual
47 www.acrosser.com
msg.data[2] = 0xc3;
msg.length = 3;
5.1.2. GPIO and Watchdog
5.1.2.1. Overview
This model provides both a GPIO interface and a Watchdog timer. Users can use
the GPIO and Watchdog APIs to configure and to access the GPIO interface and the
Watchdog timer. The GPIO has four input pins and four output pins. The Watchdog
timer can be set to 1~255 seconds. Setting the timer to zero disables the timer. The
remaining seconds of the timer to reboot can be read from the timer.
5.1.2.2. Installing Device Driver
Before executing the applications which invoke the GPIO or Watchdog APIs, users
should make sure that the Linux device driver or the Windows device driver has
been installed.
On Linux platform, after successfully installing the device driver, a character device
node named “/dev/AcroDev” will be created automatically. The APIs open the device
node “/dev/AcroDev” implicitly so acquiring a file descriptor of “/dev/AcroDev” is not
ncecssary.
On Windows platform, after successfully installing the device driver, there is a device
which shows ‘Acrosser Device’ in the ‘Device Manager’. The APIs on Windows
platform open this device implicitly.
5.1.3. Power Subsystem
5.1.3.1. Overview
The Power Subsystem APIs can be used to get and set the configuration of power
subsystem. By invoking the Power Subsystem APIs, users can:
1. Get the firmware version number of the Power Subsystem.
2. Set all the settings of the Power Subsystem to the default values.
3. Get/Set the status of the remote switch(ENABLE or DISABLE).
4. Get the battery voltage.
5. Get/set the status of the battery monitor (ON or OFF).
6. Get/set the delta value which identifies how much the battery voltage can be
lower than the nominal voltage. When the voltage is lower than the tolerable
voltage, the power subsystem turns off the system.
7. Get/set the Soft Off deley.
8. Get/set the Hard Off delay.
9. Get/set the Power On delay.
10. Get/set the Shutdown delay.