serin on sx48

stef

Hi

Thanks to you guy's I solved my latest problem with the resonator. So I could back again focus on the sx/b program. Today I created the code for the dtmf decoding and that wend all well. I programd an output (relay is connected) that wen sombody dials *9# on his phone the relay is aktivated for 10 sec. Did the same for *7# and a second relay. That is working. Now I want to read also from a serial connection to a pc and reakt on it. So I used serin RC.2, T9600, data, 100, nochar. That is reading a·byte in the data var. If nothing is recieving it is exiting the command after 100 milsec to nochar label.
I did it because else the serin command is blocking my program.
I'm using a max 233 betwien the sx and the pc.
It seems like I never recieve any·byte on it.

I double cheked with a scoop on the rc.2 pin·and thier I see the pinchange happen when thier is something send. (from hyperterminal on other pc puched on the a or b or c key). Rc.2 is getting back high if noting is going on. So the bits ar on rc.2. Why do I get nothing on the data byte??

Some sugestions.

Stef
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Bean

Do you get data if you remove the timeout ?
Do you get data if you use a resistor instead of the MAX233 (using N9600) ?

Bean.

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stef

Hi Bean

Yes I get data if I remove the timeout. Not at the first char I send but when I send 4 or 5 times a char A (example) then I recieve something.

Not always the same and not what I would expect. Seem something is out of sinc. I already doble cheked the baud rate but everything is fine.

I now aded a sirout command for trying the other way and that is without any problem running fine (serout rc.3,T9600,"Q") I recieve in hyperterm always that what I send.

I never tried without a max233. I always use that as buffer. So I realy like to keep him between. I had some problems on javeline stams if It was not used so now I 'm always putting him between. If you want I can make a temporary bypase for testing but eventualy I like to have him up and running with the max233. I thout it was no issue for using it.

So sending is no problem but recieving gives me data but strange.

stef

Bean

You don't have an interrupt do you ?
Can you post your code ?

Bean.

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stef

Hi

No I'm not using interrups.

I forgot my usb stick at work. thier is my code on. I'will post it tomorrow.

In the mean time I found something I think I did wrong. The RX line from the 233 to the sx48 has no pull up 10 K. As for the sx48 it is an input(serin) , don't you think I need to add it. All my other inputs have them.

The output has no need of it (serout) and that one is working.

Second I had an·compile error that thier is no·memory space left for declaring variables. I seached the manual but could not emediat find how many var thier can be in 1 sx48. I'm using Byte and word . Can you give me a·amount?.



thanks

Stef

JonnyMac

Memory limits are listed in the help file, and when you run out of bank 0 memory (simple variables, byte or word) the compiler will warn you.

stef

Hi Jonny

I understand that now. I need more variable's. Is thier a way to use memory not in bank0 for that?? (in sx/B)

stef

stef

Hi Bean

For info.

Found the problem wit serin. Command is working fine now. Problem was on 233. Pin 6 AND 9 need to be connected to GND. Not only 6. I think that is because off leck off sleep I made that mistake. After changing It was all working fine.

Thanks in advance for the help. Project fror DTMF decoding is now finiched and testrunning fine.

stef

Bean

If you need more variables, in most (not all) cases you can use a single element array for a byte variable.

char VAR BYTE(1)

SERIN sPin, T9600, char(0)

What I do is start changing byte variables to byte(1). Then recompile after each change, if the compiler complains, change it back to a normal byte variable.

It's hard to make any other recommendations because you have never posted your code.

Bean.

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stef

Hi

In attachmend pard off the code. As you can see under variables that are the one I use. I can create no more because then I get the error.

So for a sx48 with a lot of in and outs it has not much place for varaiables. It depends on the kind of program one want to make but for me it was a simple one and I already run into the limite. I solved some things otherwise so now the program is running fine but I was only curiuse for future project I want to make. I will try what you sugested with the area and go from thier.

I was wondering if the Propellor has more? Do you know that??

stef