static int EplLinProcWrite(struct file *file, const char __user *buffer, unsigned long count, void *data)
{
char abBuffer[count + 1];
int iErr;
int iVal = 0;
tEplNmtEvent NmtEvent;
if (count > 0)
{
iErr = copy_from_user(abBuffer, buffer, count);
if (iErr != 0)
{
return count;
}
abBuffer[count] = '\0';
iErr = sscanf(abBuffer, "%i", &iVal);
}
if ((iVal <= 0) || (iVal > 0x2F))
{
NmtEvent = kEplNmtEventSwReset;
}
else
{
NmtEvent = (tEplNmtEvent) iVal;
}
// execute specified NMT command on write access of /proc/epl
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_NMTU)) != 0)
EplNmtuNmtEvent(NmtEvent);
#endif
return count;
}
//---------------------------------------------------------------------------
//
// Function: EplNmtuProcessEvent
//
// Description: processes events from event queue
//
//
//
// Parameters: pEplEvent_p = pointer to event
//
//
// Returns: tEplKernel = errorcode
//
//
// State:
//
//---------------------------------------------------------------------------
EPLDLLEXPORT tEplKernel PUBLIC EplNmtuProcessEvent(tEplEvent * pEplEvent_p)
{
tEplKernel Ret;
Ret = kEplSuccessful;
// process event
switch (pEplEvent_p->m_EventType) {
// state change of NMT-Module
case kEplEventTypeNmtStateChange:
{
tEplEventNmtStateChange *pNmtStateChange;
// delete timer
Ret =
EplTimeruDeleteTimer(&EplNmtuInstance_g.m_TimerHdl);
pNmtStateChange =
(tEplEventNmtStateChange *) pEplEvent_p->m_pArg;
// call cb-functions to inform higher layer
if (EplNmtuInstance_g.m_pfnNmtChangeCb != NULL) {
Ret =
EplNmtuInstance_g.
m_pfnNmtChangeCb(*pNmtStateChange);
}
if (Ret == kEplSuccessful) { // everything is OK, so switch to next state if necessary
switch (pNmtStateChange->m_NewNmtState) {
// EPL stack is not running
case kEplNmtGsOff:
break;
// first init of the hardware
case kEplNmtGsInitialising:
{
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterResetApp);
break;
}
// init of the manufacturer-specific profile area and the
// standardised device profile area
case kEplNmtGsResetApplication:
{
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterResetCom);
break;
}
// init of the communication profile area
case kEplNmtGsResetCommunication:
{
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterResetConfig);
break;
}
// build the configuration with infos from OD
case kEplNmtGsResetConfiguration:
{
unsigned int uiNodeId;
// get node ID from OD
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_OBDU)) != 0) || (EPL_OBD_USE_KERNEL != FALSE)
uiNodeId =
EplObduGetNodeId
(EPL_MCO_PTR_INSTANCE_PTR);
#else
uiNodeId = 0;
#endif
//check node ID if not should be master or slave
if (uiNodeId == EPL_C_ADR_MN_DEF_NODE_ID) { // node shall be MN
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_NMT_MN)) != 0)
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterMsNotActive);
#else
TRACE0
("EplNmtuProcess(): no MN functionality implemented\n");
#endif
} else { // node shall be CN
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterCsNotActive);
}
break;
}
//-----------------------------------------------------------
// CN part of the state machine
// node listens for EPL-Frames and check timeout
case kEplNmtCsNotActive:
{
DWORD dwBuffer;
tEplObdSize ObdSize;
tEplTimerArg TimerArg;
// create timer to switch automatically to BasicEthernet if no MN available in network
// read NMT_CNBasicEthernetTimerout_U32 from OD
ObdSize = sizeof(dwBuffer);
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_OBDU)) != 0) || (EPL_OBD_USE_KERNEL != FALSE)
Ret =
EplObduReadEntry
(EPL_MCO_PTR_INSTANCE_PTR_
0x1F99, 0x00, &dwBuffer,
&ObdSize);
#else
Ret = kEplObdIndexNotExist;
#endif
if (Ret != kEplSuccessful) {
break;
}
if (dwBuffer != 0) { // BasicEthernet is enabled
// convert us into ms
dwBuffer =
dwBuffer / 1000;
if (dwBuffer == 0) { // timer was below one ms
// set one ms
dwBuffer = 1;
}
TimerArg.m_EventSink =
kEplEventSinkNmtk;
TimerArg.m_ulArg =
(unsigned long)
kEplNmtEventTimerBasicEthernet;
Ret =
EplTimeruModifyTimerMs
(&EplNmtuInstance_g.
m_TimerHdl,
(unsigned long)
dwBuffer,
TimerArg);
// potential error is forwarded to event queue which generates error event
}
break;
}
// node processes only async frames
case kEplNmtCsPreOperational1:
{
break;
}
// node processes isochronous and asynchronous frames
case kEplNmtCsPreOperational2:
{
Ret =
EplNmtuNmtEvent
(kEplNmtEventEnterReadyToOperate);
break;
}
// node should be configured und application is ready
case kEplNmtCsReadyToOperate:
{
break;
}
// normal work state
case kEplNmtCsOperational:
{
break;
}
// node stopped by MN
// -> only process asynchronous frames
case kEplNmtCsStopped:
{
break;
}
// no EPL cycle
// -> normal ethernet communication
case kEplNmtCsBasicEthernet:
{
break;
}
//-----------------------------------------------------------
// MN part of the state machine
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_NMT_MN)) != 0)
// node listens for EPL-Frames and check timeout
case kEplNmtMsNotActive:
{
DWORD dwBuffer;
tEplObdSize ObdSize;
tEplTimerArg TimerArg;
// create timer to switch automatically to BasicEthernet/PreOp1 if no other MN active in network
// check NMT_StartUp_U32.Bit13
// read NMT_StartUp_U32 from OD
ObdSize = sizeof(dwBuffer);
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_OBDU)) != 0) || (EPL_OBD_USE_KERNEL != FALSE)
Ret =
EplObduReadEntry
(EPL_MCO_PTR_INSTANCE_PTR_
0x1F80, 0x00, &dwBuffer,
&ObdSize);
#else
Ret = kEplObdIndexNotExist;
#endif
if (Ret != kEplSuccessful) {
break;
}
if ((dwBuffer & EPL_NMTST_BASICETHERNET) == 0) { // NMT_StartUp_U32.Bit13 == 0
// new state PreOperational1
TimerArg.m_ulArg =
(unsigned long)
kEplNmtEventTimerMsPreOp1;
} else { // NMT_StartUp_U32.Bit13 == 1
// new state BasicEthernet
TimerArg.m_ulArg =
(unsigned long)
kEplNmtEventTimerBasicEthernet;
}
// read NMT_BootTime_REC.MNWaitNotAct_U32 from OD
ObdSize = sizeof(dwBuffer);
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_OBDU)) != 0) || (EPL_OBD_USE_KERNEL != FALSE)
Ret =
EplObduReadEntry
(EPL_MCO_PTR_INSTANCE_PTR_
0x1F89, 0x01, &dwBuffer,
&ObdSize);
#else
Ret = kEplObdIndexNotExist;
#endif
if (Ret != kEplSuccessful) {
break;
}
// convert us into ms
dwBuffer = dwBuffer / 1000;
if (dwBuffer == 0) { // timer was below one ms
// set one ms
dwBuffer = 1;
}
TimerArg.m_EventSink =
kEplEventSinkNmtk;
Ret =
EplTimeruModifyTimerMs
(&EplNmtuInstance_g.
m_TimerHdl,
(unsigned long)dwBuffer,
TimerArg);
// potential error is forwarded to event queue which generates error event
break;
}
// node processes only async frames
case kEplNmtMsPreOperational1:
{
DWORD dwBuffer = 0;
tEplObdSize ObdSize;
tEplTimerArg TimerArg;
// create timer to switch automatically to PreOp2 if MN identified all mandatory CNs
// read NMT_BootTime_REC.MNWaitPreOp1_U32 from OD
ObdSize = sizeof(dwBuffer);
#if (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_OBDU)) != 0) || (EPL_OBD_USE_KERNEL != FALSE)
Ret =
EplObduReadEntry
(EPL_MCO_PTR_INSTANCE_PTR_
0x1F89, 0x03, &dwBuffer,
&ObdSize);
if (Ret != kEplSuccessful) {
// ignore error, because this timeout is optional
dwBuffer = 0;
}
#endif
if (dwBuffer == 0) { // delay is deactivated
// immediately post timer event
Ret =
EplNmtuNmtEvent
(kEplNmtEventTimerMsPreOp2);
break;
}
// convert us into ms
dwBuffer = dwBuffer / 1000;
if (dwBuffer == 0) { // timer was below one ms
// set one ms
dwBuffer = 1;
}
TimerArg.m_EventSink =
kEplEventSinkNmtk;
TimerArg.m_ulArg =
(unsigned long)
kEplNmtEventTimerMsPreOp2;
Ret =
EplTimeruModifyTimerMs
(&EplNmtuInstance_g.
m_TimerHdl,
(unsigned long)dwBuffer,
TimerArg);
// potential error is forwarded to event queue which generates error event
break;
}
// node processes isochronous and asynchronous frames
case kEplNmtMsPreOperational2:
{
break;
}
// node should be configured und application is ready
case kEplNmtMsReadyToOperate:
{
break;
}
// normal work state
case kEplNmtMsOperational:
{
break;
}
// no EPL cycle
// -> normal ethernet communication
case kEplNmtMsBasicEthernet:
{
break;
}
#endif // (((EPL_MODULE_INTEGRATION) & (EPL_MODULE_NMT_MN)) != 0)
default:
{
TRACE1
("EplNmtuProcess(): unhandled NMT state 0x%X\n",
pNmtStateChange->
m_NewNmtState);
}
}
} else if (Ret == kEplReject) { // application wants to change NMT state itself
// it's OK
Ret = kEplSuccessful;
}
EPL_DBGLVL_NMTU_TRACE0
("EplNmtuProcessEvent(): NMT-State-Maschine announce change of NMT State\n");
break;
}
default:
{
Ret = kEplNmtInvalidEvent;
}
}
//Exit:
return Ret;
}