Serial comm - are 2 wires for TX only enough?

[flotulopex]

Great,

I added both ANSEL and CMCON settings as you suggested and it works fine now (I can see "TEST" in the terminal screen).

I'm going back to the data sheet and try to understand what these settings change to my prog.

I'll also try to "play" with the oscillator settings since this is not absolutely clear to me at that time.

Thanx a lot for your help.

[flotulopex]

After a few more tests, ANSEL and CMCON don't affect the PIC's behaviour.

The key seems to be the oscillator OSCON setting.

Before I got your help, I was using an external 20Mhz ceramic resonator. Nothing worked.

I changed to the internal oscillator with default settings = 31,25kHz. Nothing worked either.

To make it work, I set the oscillator to 4MHz as suggested by Mister_e.

I also tried all the other possible internal oscillator (IRCF) settings; apparently, only 4MHz is working.

I read the PBP help file under the SEROUT2 command. Nothing specifies that serial communication is working only with 4MHz.

I'm not using the USART functionality of this PIC. Is there any info I'm missing somewhere else?

[Sphere]

Make shure your fuse settings are correct before you program the pic and if you are going to use a 20Mhz oscillator remember to add the line DEFINE OSC 20

Hope it helps
Sphere.

[mister_e]

Sure the DEFINE OSC 20 have to be inserted... but you have to modify the config fuse too... case not, it will neever ever work

Look at http://www.picbasic.co.uk/forum/showthread.php?t=543

you must set the OSC fuse to HS