xport code, have example, confused though

[kenpo]

haven't hooked it up yet, so currently running at 0v

not sure how to run something at 3.3v is there something like a 7805?


and still no idea what USART is so I guess I'll do some reading.

xport defualt is 9600, but it can be brought down.

I'm excited to try this thing out, but I'm waiting for a breadboard compatible breakout board before I try it, rather than rush in and break something my first try.

[mister_e]

To run at 3.3 volt, yup you'll need a 3.3v voltage regulator. Now double check your specific datasheet to know if the PIC can run @3.3 volt without problem, case not, you may need to use a sort of level shifter between your PIC running @5volt and the Xport running @3.3v.

USART is just another built-in PIC feature, listed in the datasheet. You will need to use HSERIN/HSEROUT + some DEFINEs all listed in the PBP manual.

with 4MHz you can run the internal USART to have a really decent/accurate 9600 bauds.

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
DEFINE HSER_SPBRG 25  ' 9600 Baud @ 4MHz, 0.16%
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

[kenpo]

thanks everyone! I'm going to muck around with all of this now!

[Charles Linquis]

You can get a 3.3V regulator. I use an LM3940
You obviously haven't read section 12 of the 16F628 datasheet - where it describes the USART!
There is no need to run the XPORT at a speed slower than 9600 baud.