Can you help me about #use rs232

[murtis]

Hi,

I am using PIC18F4620 and ccs PCWH. I want to send some data from PIC18F4620 to PC via RS232. But, i have some problem. The problem is that data comes to PC one or two times. After that there is no data. I am confused. What is the problem_?
#fuses XT, NOWDT, NOPROTECT, NOBROWNOUT, NOPUT, NOLVP, NOWRT
#use delay(clock=4000000)
#use rs232(BAUD=2400, rcv=PIN_C7, xmit=PIN_C6, parity=N, bits=8,errors,force_sw)
.
.
BYTE a1[3];
.
.
while(TRUE)
{
putchar('u');
putchar('a');
puts(a1[0]);
puts(a1[1]);
puts(a1[2]);
.
.
.
}



Also,i have a visual basic code for watching the data coming from the PIC18F4620.(MSCOMM32.ocx) What is the solution_?

Could you help me about this event_?

Thanks,
_________________
MurtiS

[PCM programmer]

[murtis]

i know that

[ckielstra]

[murtis]

Firstly, i wrote the code for uart before now. This code works other application. but i try to write the code like this. But it does not work, and i am confused. So, i tried to write other code types for uart communications. Only with puts(byte aa[i]); there is a communications between pc and PIC.
_________________
MurtiS

[ckielstra]

There are no known problems with the UART software, so there must be something different in your situation.

What is your compiler version? It looks like 3.249 or 4.055.

Have you tried the example code from PCM Programmer? And is this working?

Does the problem go away if you use Hyperterm (or another tool) instead of the mscomm control?

Post a small (max. 15 lines) and complete program that is showing your problem. Complete means, including #fuses statements, etc. so we can copy paste the code into our compiler.

[arunb]

Use hyperterminal to test send and receive functions from the PIC and PC, after you have done this use the MSCOMM32.ocx control to access the PIC.

thanks
arunb

[murtis]

I tried to send data from the PIC to PC like PCM PROGRAMMER said. But the data came three times from PIC...
Also, i tried to send data PIC to hyperterminal. But the data came four times from PIC to PC. I have a problem but it does not known by anybody and me. it is strange.

Had someone this problem_?

And thank you, my friends that try to help me...
_________________
MurtiS

[ckielstra]

Again:
- Post your compiler version
- Post the small program you are using to send data to the PC. (max 15 lines of code and make sure it is complete, including #fuses line).

Many things can be wrong and if you post your example program it will be much quicker than us asking all the things that can be possibly wrong.

[murtis]

Hi ckielstra,

the small program is working thank you

i could not send my program because it is very long... What is my problem_?
_________________
MurtiS

[murtis]

The problem is timeout. how i can solve this problem_?
if there is a timeout, PC close the RS232...
????
_________________
MurtiS

[ckielstra]

[murtis]

compiler version is 4.042 and there is no different between large and small program. i think that i am good in programming but sometimes, something is going bad.
i am testing something via PIC and after that PIC sends the result of testing. i think that timeout is appearing on RS232.

My large program is 4000 lines in word. Namely, 160 MS word pages. All lines is working very well but only i have timeout problem a little bit.

#fuses NOWDT and disabled all interrupts

Thank you, ckielstra
_________________
MurtiS

[ckielstra]

[Ttelmah]

There is no default 'timeout', in the PIC RS232 handling. If you want it, you have to write code to add it. The only way you can see a 'timout' behaviour, is if your code is generating it, either by (for instance), letting a watchdog timeout occur, while handling the RS232, or by deliberately generating it (a search here for 'timed getc', will find code examples)....
Timout handling, has been added in the latest V4 compilers, but you have to explicitly program for this.

Best Wishes