/*----------------------------------------------------------------------------*\
Read method for the Modbus Master agent
\*----------------------------------------------------------------------------*/
static pwr_tStatus IoAgentRead(io_tCtx ctx, io_sAgent* ap)
{
io_sAgentLocal* local;
io_sRackLocal* local_rack;
pwr_tUInt16 sts;
io_sRack* rp;
pwr_tCid cid;
pwr_sClass_Modbus_TCP_Slave* sp;
local = (io_sAgentLocal*)ap->Local;
/* Do configuration check and initialize modules. */
rp = ap->racklist;
while (rp) {
cid = rp->Class;
while (ODD(gdh_GetSuperClass(cid, &cid, rp->Objid)))
;
switch (cid) {
case pwr_cClass_Modbus_TCP_Slave:
sp = (pwr_sClass_Modbus_TCP_Slave*)rp->op;
local_rack = rp->Local;
/* Start receving old data so the input buffer is flushed */
if (sp->Status == MB__NORMAL) {
sts = mb_recv_data(local_rack, rp, sp);
}
/* Request new data */
if (sp->Status == MB__NORMAL && sp->DisableSlave != 1) {
sts = mb_send_data(local_rack, rp, sp, mb_mSendMask_ReadReq);
}
break;
} /* End - switch ... */
rp = rp->next;
}
return IO__SUCCESS;
}
/*----------------------------------------------------------------------------*\
Write method for the Modbus_TCP slave
\*----------------------------------------------------------------------------*/
static pwr_tStatus IoRackWrite (
io_tCtx ctx,
io_sAgent *ap,
io_sRack *rp
)
{
io_sRackLocal *local;
pwr_sClass_Modbus_TCP_Slave *sp;
pwr_tStatus sts;
local = rp->Local;
sp = (pwr_sClass_Modbus_TCP_Slave *) rp->op;
local->expected_msgs = 0;
if (sp->Status == MB__NORMAL && sp->DisableSlave != 1) {
sts = mb_send_data(local, rp, sp, mb_mSendMask_WriteReq);
}
if (sp->DisableSlave == 1) sp->Status = MB__DISABLED;
return IO__SUCCESS;
}