Rockwell Automation D17846.2.4 CONTROLNET KT EMULA - Manual (Page 33)

1784-6.2.4 - September 1997
Example Code for Polled and Interrupt Messaging A-3
/* shutdown KT emulation */
cprintf("Taking KT Emulation Mode offline (shutdown emulation)\r\n");
pDP->comm.online
=0xff
pDP->comm.shutdown_trig=0x01;
cprintf("Waiting for KT stopped flag to go to 0xFF......\r");
while (!kbhit() && (pDP->comm.shutdown_stat != -1))
{
}
cprintf("KT has been shutdown \r");
*pReset = 1;
pDp->comm.heartbeat = 4;
PDp->comm.shutdown_trig = 0
Example Code for
Interrupt Messaging The following example code shows how to run interrupt messaging
over the dual-port.
/* Interrupt driven test */
cprintf("Running emulation under interrupts\r\n");
/* Hold the card in reset while the interrupt system is being setup */
outportb( H186RESET,0 );
outportb( HRESETON,0 );
/* Set the card up to interrupt on IRQ5 */
outportb (HIRQCTRL1,0);
outportb (HIRQCTRL2,IRQ5_HMASK);
/* setup the interrupt vector */
oldhandler = getvect(0xD);
setvect(0xD, KTCIRQHandler);
/* unmask the interrupt */
outport(0x20+1, inport(0x20+1) & ~0x20);
iNumInts=0;
/* release the KTC. This will activate the card */
i = *(int *) MK_FP(0xd000, 0x3ffc);
outportb( HRESETOFF, 0);
outportb( H186RUN, 0xff );
/* There should be at least one interrupt at this time */
delay (4000);
/* Load the initializing string into the dualport */
cprintf("\r\nStarting up emulation mode...wait 1/2 second\r\n");
pDP->comm.unused1[0]=0xC3;
pDP->comm.unused1[1]=0x00;
pDP->comm.unused1[2]=0x00;
pDP->comm.unused1[3]=0x00;
pDP->comm.online
=0x00;
pDP->comm.nodeaddr=0x08;
pDP->comm.shutdown_trig=0x00;
*pRun = 1;
cprintf(" Heartbeat: %2d, Run: %2d, Stop: %2d\r", pDP->comm.heartbeat, *pRun, *pReset);
delay(500)
/* monitor heartbeat flag for transition to 2 */
pHBPrev = pDP->comm.heartbeat;
while ((!kbhit()) && (pDP->comm.heartbeat !=2))
{
if (pHBPrev != pDP->comm.heartbeat)
{
cprintf("\r\nHeartbeat:%2d,Stop %2d\r",pDP->comm.heartbeat,*pRun,*pReset); pHBPrev =
pDP->comm.heartbeat;
}
}
cprintf("\r\n---->%5d"iNumInts);
/* monitor the send and receive flags that are set by the interrupts */
/* turn on the KT interrupts */
*pIntMode = 0x01 |/*on transmit interrupts*/
0x02; /*on receive interrupts*/
/* check if send box is available */
fSendBoxAvailable=(((pDP->comm.send.shake1==1) && (pDPcomm.rev.shake2 ==1)) - TRUE :FALSE);
/* check if receive box is available */
fSendBoxAvailable=(((pDP->comm.rev.shake1 ==1) && (pDP-comm.rev.shake2==1)) - TRUE :FALSE);