USART TX Interrupt problem. (DT_INTS)

[amgen]

OK then,

This puts a byte at location 50 (dec) in ram

String_1    VAR BYTE 50       ' Array to hold string.

this puts array of 50 where PBasic puts it

String_1    VAR BYTE  [50]             ' Array to hold string.

this puts array of 50 at location $100, (100hex, 256 dec)

String_1    VAR BYTE  [50]              $100     ' Array to hold string.

At the bottom of the generated LIST file is a listing of the mem locations for ram and prog mem
there you can see the var's location and alotted space left between arrays.



Don

[HenrikOlsson]

That's it, thank you!
It was all in the declaration, I had forgot the brackets!

Can't belive I didn't think of that - the number of times I've been there and changed the value and missed the missing brackets. Guess, since it worked with an imiginary lenght of 50 it was harder to see.

Thanks again!

/Henrik.

[amgen]

that will be $1 or cup of coffee or credit for my future dumb stuff

don

[Dave]

Henerik, Why are you using HSEROUT when you have the interrupt all setup?

[HenrikOlsson]

Because the interrupt messed up my array of data and the HSEROUT statements helped me show what was going on. Which turned out to be that I hadn't declared the array properly.

[Dave]

Yeah, I understand that but, Why don't you just load the array with your message and then enable the interrupt? You have the code there already.. The interrupt will disable it when the message is sent... I have used this methode for the last few years but not with the ARRAYREAD or ARRAYWRITE statements... Just loose the HSEROUT stuff.... THat way it's all done in the background...

[HenrikOlsson]

Dave,
That was the purpose all along and that is exactly what I did - but it didn't work, it just gave me garbage as you can see in my first post. So I added the HSEROUT statements to help debug the problem which, again, was my erronous array declaration. Now when teh problem is found and fixed the HSEROUT statements are gone.

The code isn't "production code" it's code to illustrate the problem I had with the interrupt routine corrupting my array.

/Henrik.