NetModule NB3000-Line-Hd, Руководство пользователя

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NB3000-Line-Hd User Manual 4.2
5.7. SERVICES
5.7.1. SDK
NetModule routers are shipping with a Software Development Kit (SDK) which offers a sim-
ple and fast way to implement customer-specific functions and applications. It consists of:
1. An SDK host which defines the runtime environment (a so-called sandbox), that is,
controlling access to system resources (such as memory, storage and CPU) and, by
doing so, catering for the right scalability
2. An interpreter language called
arena
, a light-weight scripting language optimized for
embedded systems, which uses a syntax similar to ANSI-C but adds support for excep-
tions, automatic memory management and runtime polymorphism on top of that
3. A NetModule-specific Application Programming Interface (API), which ships with a com-
prehensive set of functions for accessing hardware interfaces (e.g. digital IO ports,
GPS, external storage media, serial ports) but also for retrieving system status param-
eters, sending E-Mail or SMS messages or simply just to configure the router
Anyone, reasonably experienced in the C language, will find an environment that is easy
to dig in. However, feel free to contact us via router@support.netmodule.com and we will
happily support you in finding a programming solution to your specific problem.
The Language
The
arena
scripting language offers a broad range of POSIX functions (like
printf
or
open
)
and provides, together with tailor-made API functions, a simple platform for implementing
any sort of applications to interconnect your favourite device or service with the router.
Here comes a short example:
/* We are going to eavesdrop on the first serial port
* and turn on lights via a digital I/O output port ,
* otherwise we 'd have to send a short message .
*/
for
( attempts = 0; attempts < 3; at+) {
if
( nb_serial_read ( " serial0 " ) == " Knock Knock !" ) {
nb_serial_write ( " serial0 " , " Who 's there ?" );
if
( nb_serial_read ( " serial0 " ) == " Santa " ) {
printf ( " Hurray !\n" );
nb_dio_set ( " out1 " , 1);
}
}
}
nb_sms_send ( " +123456789 " , "No presents this year :(" )
A set of example scripts can be downloaded directly from the router, you can find a list of
them in the appendix. The manual which can be obtained from the NetModule support web
page gives a detailed introduction of the language, including a description of all available
functions.
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