How to intercept CONNECT 9600 by software application

Legacy Open AT
1

I’m doing a CSD call between two Q2686. If i use normal AT commands (atd +39xxxxxxx) to dial, i get ‘CONNECT 9600’ by GSM network. Otherwise, if i do the following code, i get no ‘CONNECT 9600’ message… why ?

void StartDataCall()
{
	if (CallTypeStatus == CALL_TYPE_UNDEFINED || CallTypeStatus == CALL_TYPE_CLOSED)
	{
		Log("s", "DATACALLING...", "");
		if (isGprsTcpChannelOpen == TRUE) GprsStop();
		adl_callSetup(myAuthorizedPhoneNumbers.GpsNumber, ADL_CALL_MODE_DATA);
		CallTypeStatus = CALL_TYPE_OPEN_DATA;
		if (adl_fcmIsAvailable(ADL_FCM_FLOW_GSM_DATA))
		{
			DatacallHandle = adl_fcmSubscribe(ADL_FCM_FLOW_GSM_DATA, (adl_fcmCtrlHdlr_f)DatacallControlHandler, (adl_fcmDataHdlr_f)DatacallDataHandler);
		}
	}
}

Here the function handlers:

bool DatacallControlHandler(u8 Event)
{
	switch(Event)
	{
		case ADL_FCM_EVENT_FLOW_OPENNED:
			Log("s", "FLOW OPEN", "");
		break;

		case ADL_FCM_EVENT_FLOW_CLOSED:
			CallTypeStatus = CALL_TYPE_CLOSED;
		break;

		case ADL_FCM_EVENT_V24_DATA_MODE:
			Log("s", "v24_DATA_MODE", "");
		break;
	}

	return TRUE;
}
//-------------------------------------------------------------------------------
bool DatacallDataHandler(u16 datalen, u8 * data)
{
	if (datalen > 0)
	{
		if (strstr(data, "CONNECT 9600") != NULL)
		{
			// Connessione pronta su chiamata dati
			Log("s", "Connessione aperta!", "");
		}

		//Log("s", "DATA: ", data);
	}
	return TRUE;
}

Where i’m doing mistakes ? Thank you!

2

i get only ADL_FCM_EVENT_FLOW_OPENNED … why ? How i can detect when data channel is ready to send/receive data ? Please help me!

3
4

Yes, i’ve changed my code but when i can start to send data ? In which event ? Thank you…

5

The Application Download sample illustrates using a CSD call (for XMODEM)…

6

Mmm no, i’ve take a look to the code and there’s no references to any adl_fcm command.

7

You haven’t looked hard enough!

In M2M Studio:

  1. Create a new project based on the ‘Application Download’ sample
  • this will give 2 projects in your worksppace: ‘Application Download’ and ‘Download’
  1. In the Project Explorer, select both of those 2 projects
  2. Search > Search > File Search
  • ‘Containing text’ = adl_fcm
  • ‘File name patterns’ = *.c
  • ‘Scope’ = ‘Selectedresources’
  • Search!

Gives me a total of 35 matches:
6 in applidwl.c
6 in downloader.c
23 in dwl_engin.c
4 in uploader.c

8

In application download example there’s NO reference to adl_fcm commands! Only to constants!
Thank you again.

9

As I said, the sample creates two projects - are you sure you are searching both projects?

10

I look direct thru windows search in samples directory. Believe me i know how to do a search. I’ve resolved with a trick but there’s no CONNECT 9600 sent when two q2686 estabilishes a data call connection using ADL APIs. May be a bug in the firmware.

11

No, that sounds perfectly reasonable: the ADL APIs “catch” the unsolicited response, and convert it to an Even which is passed to the app’s Event Handler.

12

There’s no Event raised when the connection is estabilished… This is the reason of my topic… No event raised using ADL APIs. I need to subscribe an unsolicited response ? How ?

13

Of course there is - otherwise the DOTA sample wouldn’t work!

No, you don’t.

I suggest that you just setup a simple project which simply traces the events as you do this manually - so that you can see which ADL events correspond to the “manual” actions…

Your handler will, of course, need to return ADL_CALL_FORWARD.

14

Yes i say there’s no event 'cause i’m doing something wrong, of course!! :smiley: So i post my code:

There are call and data handlers on the calling side:

bool DatacallControlHandler(u8 Event)
{
	switch(Event)
	{
		case ADL_FCM_EVENT_FLOW_OPENNED:
			TRACE((2, "DatacallControlHandler(): FLOW OPEN"));
			adl_callSetup(myAuthorizedPhoneNumbers.GpsNumber, ADL_CALL_MODE_DATA);			
			if (adl_fcmIsAvailable(ADL_FCM_FLOW_GSM_DATA))
			{
				timer_DatacallStopOnErrorHandle = adl_tmrSubscribe(FALSE, 10*60 * 3, ADL_TMR_TYPE_100MS, (adl_tmrHandler_t)timer_DatacallStopOnError);
			}
			isDataCall = TRUE;
			adl_fcmSwitchV24State(DatacallHandle, ADL_FCM_V24_STATE_DATA);
		break;

		case ADL_FCM_EVENT_FLOW_CLOSED:
			CallTypeStatus = CALL_TYPE_CLOSED;
			isDataCall = FALSE;
			TRACE((2, "DatacallControlHandler(): FLOW CLOSED"));
			adl_fcmSwitchV24State(DatacallHandle, ADL_FCM_V24_STATE_AT);
		break;

		case ADL_FCM_EVENT_V24_DATA_MODE:
			TRACE((2, "v24_DATA_MODE"));
		break;

		case ADL_FCM_EVENT_V24_AT_MODE:
			TRACE((2, "v24_AT_MODE"));
			adl_fcmReleaseCredits(DatacallHandle, 0xFF);
		break;

		case ADL_FCM_EVENT_V24_AT_MODE_EXT:
			adl_fcmReleaseCredits(DatacallHandle, 0xFF);
		break;
	}

	return ADL_CALL_FORWARD;
}

bool DatacallDataHandler(u16 datalen, u8 * data)
{
	if (datalen > 0)
	{
		if (strstr(data, "CONNECT") != NULL)
		{
			TRACE((2, "CONNECT 9600"));
		}
		else
		{
			TRACE((2, "DATA:%s", data));
		}
	}
	return TRUE;
}

I make the datacall to receiver side with this code:

void StartDataCall()
{
	if (CallTypeStatus == CALL_TYPE_UNDEFINED || CallTypeStatus == CALL_TYPE_CLOSED)
	{
		GprsStop();
		CallTypeStatus = CALL_TYPE_OPEN_DATA;
		DatacallHandle = adl_fcmSubscribe(ADL_FCM_FLOW_GSM_DATA, (adl_fcmCtrlHdlr_f)DatacallControlHandler, (adl_fcmDataHdlr_f)DatacallDataHandler);	
        }
}

Where i get the ‘connect 9600’ message ? In the “DatacallDataHandler()” as string message ? Thank you.