My USART problems..

[mackrackit]

Looks like pins 2 and 3 on the DB9 backwards?

[mackrackit]

I did not see the part about the tx/rx switch.

Do you have a copy of Pic Multicalc?
http://www.picbasic.co.uk/forum/show...24&postcount=4

[Glenn]

Yea, since I use a cable that is crossed I connected it that way, but later I added the switch that change the positions, mainly coz I wasnt really sure how it should be

Yea, I have picmulticalc, but I didnt really thought of that it had USART help.

And yes..

I choosed 20Mhz 9600bps and copied the defines to my code (replacing the old ones), and voila, it worked.

Niice.

But I still dont undersstand why it didnt work before ?

..This was the defines picmulticalc gave me:

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
DEFINE HSER_SPBRG 129 ' 9600 Baud @ 20MHz, 0,16%
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

[mackrackit]

I have never tried DEFINE_BAUD
maybe that was the problem.

[Glenn]

Hmm, now I have problem with reading from the USART instead..

I searched the forum and found ALOT of threads, but none that really solved my prob..

I want to read a string of chars, like 16, BUT if a CR (13) occurs it should skip the rest.

I.e I want to be able to write strings UP to 16 chars in my terminal program, and get them as a string or array.

This seem to be a bit harder than I first thought ?

It was very easy to read single chars with HSERIN.. and I thiought it would be easy with something like

HSERIN [ str rxarr\16\13 ]

..But no ?

Does anyone have a bit of sample code that do this using HSERIN ?

[mackrackit]

Have you used SEROUT2/SERIN2 much? The hardware command use the same syntax.

Off the top I would try
$d
in place of
13

What exactly is or is not happening?

[Glenn]

Well, I havent used SERIN, never really had use of the serial stuff before.

Now I have:

main:

HSERIN [ str rxarr\8\13 ]
LCDOUT $FE, 1, "Serial data is:"
LCDOUT $FE, $C0, rxarr
pause 500
goto main:


..This just print the first char I write.. I want rxarr to contain eight chars.

btw I found this on melabs website, which made me even more confused..

http://melabs.com/resources/samples/pbp/usart.bas