RahulS
Registered: 15/06/12
Posts: 70
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| Posted 30/07/12 at 02:02 PM | Reply with quote #1 |
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haii...anybody knows any thread concept implementation in 4DGL...
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ESPsupport
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Registered: 27/01/09
Posts: 4,252
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| Posted 30/07/12 at 02:15 PM | Reply with quote #2 |
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What are you trying to achieve?
You would tend to code a non blocking main loop checking the touch panel.
If you were using serial comms, you could also add a non blocking check/read for the comms buffer within the main loop.
So most other things could go in the same place, maybe |
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RahulS
Registered: 15/06/12
Posts: 70
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| Posted 30/07/12 at 03:49 PM | Reply with quote #3 |
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Thanks for ur reply...I am designing a GUI application and in that, first i want to display a splash screen at the same time in the back side a comport polling has to occur. So when the COM get a value, then it has to switch to another screen from the currently running splash screen. For that, i want to process has to run in parallel...splash screen and comport reading...thanks..
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ESPsupport
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Registered: 27/01/09
Posts: 4,252
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| Posted 30/07/12 at 03:57 PM | Reply with quote #4 |
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| What I described should work well for you. |
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RahulS
Registered: 15/06/12
Posts: 70
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| Posted 30/07/12 at 04:00 PM | Reply with quote #5 |
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Could plz give a sample code for a non blocking main loop...
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ESPsupport
Moderator
Registered: 27/01/09
Posts: 4,252
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| Posted 30/07/12 at 04:21 PM | Reply with quote #6 |
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repeat
// check comms for command, how to NAK invalid command
if (com_Count() != 0)
cmd[cmdi++] := serin() ; if (cmdi == 3) // assumes all serial commands are 2 bytes long
// process command in 'cmd'
cmdi := 0 ;
endif
endif // touch code processing, more detail in many Visi samples
state := touch_Get(TOUCH_STATUS); // get touchscreen status
n := img_Touched(hndl,-1) ; if ((state == TOUCH_PRESSED) || (state == TOUCH_RELEASED) || (state == TOUCH_MOVING))
// do whatever is required
endif forever |
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RahulS
Registered: 15/06/12
Posts: 70
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| Posted 30/07/12 at 06:01 PM | Reply with quote #7 |
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Yes...its working good..thanks a lot....
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