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4.3.2
Software APIs
4.3.2.1
The GPIO API
General Purpose Input/Output is a flexible parallel interface that allows a variety of
custom connections. It allows users to monitor the level of signal input or set the out-
put status to switch on/off a device. Our API also provides Programmable GPIO,
which allows developers to dynamically set the GPIO input or output status.
4.3.2.2
The SMBus API
The System Management Bus (SMBus) is a two-wire interface defined by Intel Cor-
poration in 1995. It is based on the same principles of operation of I
personal computers and servers for low-speed system management communica-
tions. Nowadays, it can be seen in many types of embedded systems. As with other
API in SUSI, the SMBus API is available on many platforms including Windows 10.
4.3.2.3
The Display Control API
There are two kinds of VGA control APIs, backlight on/off control and brightness con-
trol. Backlight on/off control allows a developer to turn on or off the backlight, and to
control brightness smoothly.
1.
Brightness Control
–
The Brightness Control API allows a developer to interface with an embed-
ded device to easily control brightness.
2.
Backlight Control
–
The Backlight API allows a developer to control the backlight (screen) on/off
in an embedded device.
4.3.2.4
The Watchdog API
A watchdog timer (abbreviated as WDT) is a hardware device which triggers an
action, e.g. rebooting the system, if the system does not reset the timer within a spe-
cific period of time. The WDT API in SUSI provides developers with functions such as
starting the timer, resetting the timer, and setting the timeout value if the hardware
requires customized timeout values.
4.3.2.5
The Hardware Monitor API
The hardware monitor (abbreviated as HWM) is a system health supervision capabil-
ity achieved by placing certain I/O chips along with sensors for inspecting the target
of interests for certain condition indexes, such as fan speed, temperature and voltage
etc.
However, due to the inaccuracy among many commercially available hardware mon-
itoring chips, Advantech has developed a unique scheme for hardware monitoring -
achieved by using a dedicated micro-processor with algorithms specifically designed
for providing accurate, real-time and reliable data content; helping protect your sys-
tem in a more reliable manner.
4.3.2.6
The Power Saving API
1.
CPU Speed
–
Make use of Intel SpeedStep technology to reduce power consumption. The
system will automatically adjust the CPU Speed depending on system load-
ing.
2.
System Throttling
–
Refers to a series of methods for reducing power consumption in computers
by lowering the clock frequency. APIs allow the user to lower the clock from
87.5% to 12.5%.
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C and is used in
MIO-2361 User Manual
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