Serin timeout not working properly!

[Megahertz]

Hi Megahertz,

If you want the LED to blink while waiting for input you must jump to your “Main” label after the timeout. Read the Serin command for more information.

HTH

Nick

Hello Nick, that is the problem. The serin command is not working as expected.

[Bruce]

It only jumps to a timeout label if you tell it where the label is.

Main:
high led : pause 50 : low led
Serin FromRx,N2400,200,Main,["pp3"],code
.....rest fo the code here

[Megahertz]

Sorry for the code, I have missed the *Main* while writing the question. It actually is there in my code.
I will correct my code statements to the following:

Main:
high led : pause 50 : low led
Serin FromRx,N2400,200,Main,["pp3"],code
.....rest of the code here
goto Main

The code enters main label and led blinks, but then it stops. I expect it to blink after every 200mS which is not happening.

Couple of times this happened as well that program entered main label, led blinked few times lets say 5 or 6 after every 200mS but then it stopped again.

I cannot understand this erratic behaviour of my PIC.

[Bruce]

The timeout period gets continuously reset if there's noise on the serial input pin. If you're trying to use this option with a noisy RF receiver, the timeout/label approach isn't going to work.

[Megahertz]

The timeout period gets continuously reset if there's noise on the serial input pin. If you're trying to use this option with a noisy RF receiver, the timeout/label approach isn't going to work.

Are there any other options?
I tried removing timeout period and use DT Interrupts, but it gave list of following errors.

Executing: "C:\PBP\PBPW.EXE" -ampasmwin -oq -z   -p12F635 "TxRx.bas"
PICBASIC PRO(TM) Compiler 2.50b, (c) 1998, 2008 microEngineering Labs, Inc.
All Rights Reserved. 

ERROR: Variable wsave3 position request 416 beyond RAM_END 127.
ERROR: Variable wsave2 position request 288 beyond RAM_END 127.
ERROR: Variable wsave1 position request 160 beyond RAM_END 127.
ERROR: Unable to fit variable wsave
ERROR: Unable to fit variable RS1_Save
ERROR: Unable to fit variable RS2_SaveHalting build on first failure as requested.
BUILD FAILED: Thu Dec 31 14:13:38 2009

[Bruce]

Open DT_INTS-14.bas and read the first few lines about the wsave errors.

[Megahertz]

Thanks for showing the starting point. I have fired a bullet in the dark as I do not know much about ASM, banks and stuff. BUT it has reduced the errors.

I still have few errors left.
My DT_IN... .bas looks like this now:

;wsave       var byte    $20     SYSTEM      ' location for W if in bank0
wsave       var byte    $70     SYSTEM     ' alternate save location for W 
                                            ' if using $70, comment out wsave1-3
'
' --- IF any of these three lines cause an error ?? ---------------------------- 
'       Comment them out to fix the problem ----
' -- It depends on which Chip you are using, as to which variables are needed --
;wsave1      var byte    $A0     SYSTEM      ' location for W if in bank1
;wsave2      var byte    $120    SYSTEM      ' location for W if in bank2
;wsave3      var byte    $1A0    SYSTEM      ' location for W if in bank3

And the errors are following:

Executing: "C:\PBP\PBPW.EXE" -ampasmwin -oq -z   -p12F635 "TxRx.bas"
PICBASIC PRO(TM) Compiler 2.50b, (c) 1998, 2008 microEngineering Labs, Inc.
All Rights Reserved. 

ERROR: Unable to fit variable RR2_Save
ERROR: Unable to fit variable RS1_Save
ERROR: Unable to fit variable RS2_SaveHalting build on first failure as requested.
BUILD FAILED: Thu Dec 31 16:29:42 2009

Thanks

[Megahertz]

OK, did some lookaround for the problem.
I have also commented in ReEnterPBP.bas the following

 '   T3_Save     VAR WORD
 '   T4_Save     VAR WORD

Now it seems that I am quiet near but one warning message is there still :

Executing: ........"TxRx.bas"
PICBASIC PRO(TM) Compiler 2.50b, (c) 1998, 2008 microEngineering Labs, Inc.
All Rights Reserved. 
Warning[206] D:\BACKUP.........TXRX.ASM 752 : Found call to macro in column 1. (INT_CREATE)
Loaded D:\Backup..................TxRx.COD.
BUILD SUCCEEDED: Thu Dec 31 16:39:22 2009

Any advise if I should be bothered about the warning message?

[Bruce]

The 12F635 only has 64 bytes SRAM so if you're using DT ints with a PBP int handler you may need to free up some SRAM, and keep your int handler as simple as possible.

Hard to say without seeing what you're doing.