Obtain the time elapsed since the transition to the current state of the user-defined event function.
Used for timeouts, e.g. waiting for transmission completion.
The value in the initial state E_STATE_IDLE is undefined.
| Type | Name | Remark |
|---|---|---|
| tsEvent * | pEv | Management structure for user event definition functions. |
| Type | Remark |
|---|---|
| uint32 | the elapsed time since the transition. |
The following example shows how to process a send (transition to E_STATE_APP_TX_REQUEST) when a certain condition is met in E_STATE_IDLE. If the transmission is successful, cond_if_tx_complete is set to 1 or 0xff, but if this value is not set before 100ms has elapsed, the transmission times out.
uint8 cond_if_tx_complete;
void cbToCoNet_vTxEvent(uint8 u8CbId, uint8 bStatus) {
if(bStatus & 0x01) {
cond_if_tx_complete = 0x1; // TX success
} else {
cond_if_tx_complete = 0xFF; // TX FAIL
}
}
void vProcessEvCore(
tsEvent *pEv,
teEvent eEvent,
uint32 u32evarg) {
static bool_t cond;
switch (pEv->eState) {
case E_STATE_IDLE:
...
if(...) {
// changer state for wireless transmission
ToCoNet_Event_SetState(pEv, E_STATE_APP_TX_REQUEST);
}
break;
case E_STATE_APP_TX_REQUEST:
if (eEvent == E_EVENT_NEW_STATE) {
// place a transmission request.
tsTxDataApp sTx;
...
cond_if_tx_complete = FALSE; // set completion flag as deferred.
if (!ToCoNet_bMacTxReq(&sTx)) {
// fails
ToCoNet_Event_SetState(pEv, E_STATE_APP_ERROR);
}
}
// Confirmation of transmission completion conditions
if (cond_if_tx_complete == 0x1) {
// Tx success!
ToCoNet_Event_SetState(pEv, E_STATE_IDLE);
} else if (cond_if_tx_complete == 0xFF) {
// Tx fails
ToCoNet_Event_SetState(pEv, E_STATE_APP_ERROR);
}
// Tx Timeout
if (ToCoNet_Event_u32TickFrNewState(pEv) > 100) {
ToCoNet_Event_SetState(pEv, E_STATE_APP_ERROR);
}
break;
case E_STATE_APP_ERROR:
... // error handling
break;
}