Metrologic Optimus R, Programming Manual

Page: 137 / 241

Chapter 3 Terminal Specific Function Library 131
3.13.3 Initialization & Termination
After the networking parameters are properly configured, an application program can call
NetInit() to initialize any wireless module (802.11b or Bluetooth) and networking protocol
stack. The wireless modules will not be powered until NetInit() is called.
When an application program needs to stop using the network, NetClose() must be called to
shut down the network as well as the modules (so that power can be saved). To enable the
network again,
NetInit() must be called again.
Note: Any previous network connection and data will be lost after calling NetClose().
NetInit
Purpose To perform TCP/IP networking initialization.
Syntax int NetInit (void);
int NetInit (unsigned long mode);
Example struct NETSTATUS ns;
..............................
if (NetInit() < 0) {
printf ("Initialization Fail");
.................................
}
do {
OSTimeDly (10);
GetNetStatus (&ns);
} while (!ns.IPReady);
Description This routine initializes the wireless module and TCP/IP networking protocol
stack. The value of
mode can be one of the following:
WLAN_NETWORKING 0
BLUETOOTH_NETWORKING 1
Reserved 2
BT_GPRS_NETWORKING 3
IR_PPP_NETWORKING 4
RS232_PPP_NETWORKING 5
Some part of the initialization is done in a background system task.
When this routine returns, the initialization process might not yet been done.