Stack applications – Echelon LonTal Stack User Manual

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Appendix G: Appendix G

Example LonTalk

Stack Applications

5. Runs a simple command console:

• When the S command is pressed, sends a service pin messages from both

router halves by calling the sendServicePinMsg() method of the

LtIp852Router object.

• When the E or Q command is pressed, breaks out of the console loop

6. On exit, does the following:

• Shuts down the router by calling the Shutdown() method of the

LtIp852Router object.

• Closes the native LonWorks network interface by deleting the

LtLogicalChannel object.

The main() function is shown below.

/* The main function just initializes the router and then runs a simple
command line interface. */

int

main(

int

argc,

char

* argv[])

{

const

char

*pNiName = NULL;

int

ipAddress;

int

ipPort;

LtIp852Router router;
LtLtLogicalChannel *pLtChannel = NULL;

LtErrorType sts;

(argc < 4 || sscanf(argv[3],

"%d"

, &ipPort) != 1)

{
printf(

"Run an IP-852 to native LonTalk Router\n\n"

"Syntax:\n"

" Ip852Router \n"

"\n"

" is the name of the native LonTalk network

interface\n"

" is the IPv4 dotted-decimal address to use

for the IP-852\n"

" interface\n"

" is a decimal port number to use for the

IP-852 interface\n"

"\n"

);

return

}

else

{
pNiName = argv[1];
ipAddress = htonl(inet_addr(argv[2]));
}

pLtChannel =

new

LtLtLogicalChannel(pNiName);

sts = pLtChannel->getStartError();

(sts == LT_NO_ERROR && !pLtChannel->getLonLink()->isOpen())

{
sts = LT_CANT_OPEN_PORT;
}

(sts == LT_NO_ERROR)

{

#pragma

message

(

"Warning: TBD - Must set a valid unique ID for IP-852

interface!!!"

)

const

byte data[6] = { 0xBA, 0xDB, 0xAD, 0xBA, 0xD0, 0x00 };

LtUniqueId ltUid;
LtUniqueId ipUid(data);
pLtChannel->getLonLink()->getUniqueId(ltUid);