41-553M.pdf - Pickering Interfaces

5. MULTI-TERMINAL SIMULATION
The 41-553 B and C versions can simultaneously simulate a bus controller
and/or up to 32 remote terminals. The C version adds concurrent monitoring
capability and error injection. This chapter demonstrates how to configure
the 41-553 to simulate multiple terminals.
5.1 Simultaneous BC, RT and Monitor Simulation
To simulate more than one terminal simultaneously with the 41-553 you
simply concatenate the configuration code for each terminal. The code in
Fig. 5-1 illustrates this, combining terminal configurations similar to Examples
2, 3 and 4 from Chapter 4. This example assumes a 41-553 version C. If
a B version is used the monitor function is not available simultaneously with
RT and BC simulation.
MSGADDR BCMsg, RTMsg;
Card = L13_CardOpen(CARDNUM);
L13_CardReset(Card);
// Bus controller configuration from Example 2 (Fig. 4-3)
L13_BCConfig(BCCFG_DEFAULT, Card);
BCMsg = L13_BCCreateMsg(MSGCRT_DEFAULT, 0x0843, 0, &InitialData, Card);
L13_BCSchedFrame(10000, Card);
L13_BCSchedMsg(BCMsg, Card);
// RT configuration from Example 3 (Fig. 4-4)
L13_RTConfig(RTCFG_DEFAULT, 1, Card);
RTMsg = L13_RTGetMsg(SUBADDRESS, 1, RCV, 2, Card);
// Monitor configuration from Example 4 (Fig. 4-5)
L13_MonConfig(MONCFG_DEFAULT, Card);
L13_MonFilterTA(0x00000002, Card);
L13_CardStart(Card);
while( /* AS REQUIRED BY THE APPLICATION */ )
{
// Handle data as in Examples 2 through 4 in Chapter 4.
}
L13_CardStop(Card);
L13_CardClose(Card);
Fig. 5-1 Example 5: Multi-terminal simulation
L13_CardOpen and L13_CardReset only need to be called once. Note
that L13_CardReset is especially important in programs for multiterminal
versions of the 41-553. If L13_CardReset is omitted, terminal
configurations from a previous program may be intact on the 41-553. This
could result in simulation of unintended terminals.
41-553 User’s Manual 5-1