Serial VB 2005 pic 16f877a problems

[Snap]

Thanks for the reply but the problem is that the program is now (after fixing port a) locking up as soon as I connect the rx pin on the 232 adapter, the serial cable is not even connected and it locks up.
if i comment out the serin code with the 232 connected it works (without serin)
I think the serin command is locking up the program but I don't know why.
The voltage is always 5 volts untill a code comes threw would a constant 5 volts mess up the serin pin? this is a falling trigger do i need to tell the pic what type to look for?
t2400 ? n2400?
I hope I have given enough information, I have been.
what would cause the program to lock up as soon as i connect the serin pin?

thanks again

[mister_e]

Well that's strange indeed, why it locks... well it will lock anyways until you have some valid data.

You said you're using a MAX232 and you're capable of sending data to your PC... T2400 is the setting. Weird enough.. my computer don't work with such low baudrates...

serout portd.3,t2400,[#temp]
pause 1000
serin porta.1,t2400,pcsig

i would suggest to remove the pause 1000, and change your SERIN line

serout portd.3,t2400,[#temp]
serin porta.1,t2400,#pcsig

[skimask]

what would cause the program to lock up as soon as i connect the serin pin?

Post #20 here...http://www.picbasic.co.uk/forum/show...ght=serin+idle
might help you out a bit...

Or this might:
http://www.picbasic.co.uk/forum/show...highlight=idle

[mister_e]

Valid for Timeout use...

[skimask]

Valid for Timeout use...

Ayy......good point...
But what if the serial cable is 'amplifying' the unloaded pin, as in a floating input, and it ends up causing garbage to try to get into the SERIN statement.

How about adding a pullup or pulldown as appropriate?

[mister_e]

He said he use MAX232

But yes i see what you mean.

[Snap]

ok, I took out the pause, added the #, so the serin now looks like this...
serin portc.3,t2400,10,mainloop,[#pcsig]
it still locks up,
i added a 4.7 pull down to rx, no luck
pull up no luck
serial cable still not even connected (just trying to get it to run first with serin command intact)
will keep trying
thanks

[mister_e]

nope... no square brackets in that.