Communications Example : PC to PIC bi-directional dialogue

[PaulB]

Hi Melanie,

Thanks for the reply.

I thought that the SERIN and SEROUT were OK, but wanted to check.

Off topic, I'm really looking for a started guide to the use of PBC. The manual with it gives the syntax of the language tokens etc, but is not clear on use of directives etc and how to change the type of PIUC.

I thought that I should have simply been able to run your demo throug the compiler and get a HEX file at the end, but it barfs at the first @ directive!

I'll have a look through the forum again and post a note if I dont find anything.

Regards

Paulb

[Melanie]

Hi Melanie...

I am having a little problem with your program.

I loaded it into the 16f628a, and it appears the characters are getting to the rx port, but no echo's or messages....


Hi...

Sorry it's taken me so long to verify this... just so much work and so little time.

Worked straight away witha 16F628A out of the box... but... then I tried it on a normal 16F628 (just a random selection from stock)... and I had comms errors!... not all the keys on the keyboard would echo, and those that did were wrong.

So I recompiled for a 4MHz xtal (Resonator actually using XT_OSC), added the bits... and tried the chip that was giving me problems... whoo-hoo... away it ran without errors.

This just proves that Async comms even at 300 Baud are not always reliable on internal oscillator. The variances between individual chips are just too great.

I shall post this on the forum.

Melanie

[D-Work]

Hello,

I have a problem with this sample. When a open PICBASIC Terminal and type ON nothing happens but when a type ON 1 the PIC return Bad!.

Whats seems the problem, i think the PIC works fine because in the terminal i get the Bad! answer from the PIC

Thanks,
David

[Melanie]

Please see the previous posts on this thread. You either have the wrong baudrate, or your PICs internal oscillator is out of spec and you need to recompile using an xtal or resonator.

[D-Work]

I use the baudrate provided in the source code "300 baud, 8 Data Bits, No Parity, 1 stop Bit, No Flow Control".
The problem is i get errors while compiling your code, i use version 2.1.3 of Proton+.

Error at Line [112]	In file [COLOK.BAS]		*** Value Expected! ***
Error at Line [165]	In file [COLOK.BAS]		*** Variable or Value is Missing! ***
Error at Line [170]	In file [COLOK.BAS]		*** Square opening bracket '[' missing! ***
Error at Line [183]	In file [COLOK.BAS]		*** Square opening bracket '[' missing! ***
Error at Line [211]	In file [COLOK.BAS]		*** Syntax error! ***
Error at Line [247]	In file [COLOK.BAS]		*** Syntax error! ***
Error at Line [250]	In file [COLOK.BAS]	*** Misplaced or Incorrect 'ENDIF'. Also check its corresponding IF Command! ***

Regards,
David

[mister_e]

Weird error message if you'd copy/paste the Melanie's code...Be sure you use MELABS compiler.

[Melanie]

My examples are NOT written for Proton but for MeLabs PBP and are posted on this forum and on MeLabs website. The code works perfectly when used with compiler it was intended for.