> >Keith asked:
> >>If you send some text out the serial pin to a
> inverted
> >>TTL 232 rx, why does that then draw the rx pin
> below
> >>232 levels ?
>
> Larry replied:
> >The 16F628 output is wrong side up for use with say
> a MAX232, you have to
> >put something like a 7400 to invert the TX output
> so it will talk to a PC
> >properly.  UGH.
>
> You may want to check that. No inverter required at
> all.
> The 16F628 works correctly with a MAX232 or indeed a
> MAX485.
> Regards...
>
> --
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>
>

> Keith wrote:
> >I'm seeing (direct rb3) to RX on 232 lvl, I get the
> >message but once the message is sent no other i/o
> to
> >RX pin, put the meter on it voltages were in the mV
> >range.
> >
> >Weird, like the pic after sending the msg is acting
> >like a pull down.
>
> Do you have the RS232 levels going into the PIC
> directly?
> I hope not. Maybe I misunderstood?
> Hang on... why are you using RB3 for serial comms?
> You could just use the on-board UART couldn't you?
> Do you have LV programming enabled & are using RB4?
> Is this assembler code or a basic stamp type of
> thing?
> Regards...
>
> --
> http://www.piclist.com hint: PICList Posts must
> start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other
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>
>

>--- David Duffy <KILLspampiclistKILLspamAUDIOVISUALDEVICES.COM.AU>
>wrote:
> > Keith wrote:
> > >I'm seeing (direct rb3) to RX on 232 lvl, I get the
> > >message but once the message is sent no other i/o
> > to
> > >RX pin, put the meter on it voltages were in the mV
> > >range.
> > >
> > >Weird, like the pic after sending the msg is acting
> > >like a pull down.
> >
> > Do you have the RS232 levels going into the PIC
> > directly?
> > I hope not. Maybe I misunderstood?
> > Hang on... why are you using RB3 for serial comms?
> > You could just use the on-board UART couldn't you?
> > Do you have LV programming enabled & are using RB4?
> > Is this assembler code or a basic stamp type of
> > thing?

> Keith wrote:
> >Actually I'm using a 16F84A 10mhz. I am using pic
> >basic. I had asm code but man picbasic is short and
> >sweet.
>
> OK, I thought it was a 'F628 not an 'F84A.
> So do you have the RS232 levels going into the PIC?
>
> >--- David Duffy <spamBeGonepiclistspamBeGoneAUDIOVISUALDEVICES.COM.AU>
> >wrote:
> > > Keith wrote:
> > > >I'm seeing (direct rb3) to RX on 232 lvl, I get
> the
> > > >message but once the message is sent no other
> i/o
> > > to
> > > >RX pin, put the meter on it voltages were in
> the mV
> > > >range.
> > > >
> > > >Weird, like the pic after sending the msg is
> acting
> > > >like a pull down.
> > >
> > > Do you have the RS232 levels going into the PIC
> > > directly?
> > > I hope not. Maybe I misunderstood?
> > > Hang on... why are you using RB3 for serial
> comms?
> > > You could just use the on-board UART couldn't
> you?
> > > Do you have LV programming enabled & are using
> RB4?
> > > Is this assembler code or a basic stamp type of
> > > thing?
>
> Regards...
>
> --
> http://www.piclist.com hint: PICList Posts must
> start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other
> [BUY]:,[AD]: ->Ads
>
>

> Actually I'm using a 16F84A 10mhz. I am using pic
> basic. I had asm code but man picbasic is short and
> sweet.
>
>
>
>
>
> --- David Duffy <TakeThisOuTpiclistEraseMEspam_OUTAUDIOVISUALDEVICES.COM.AU>
> wrote:
> > Keith wrote:
> > >I'm seeing (direct rb3) to RX on 232 lvl, I get the
> > >message but once the message is sent no other i/o
> > to
> > >RX pin, put the meter on it voltages were in the mV
> > >range.
> > >
> > >Weird, like the pic after sending the msg is acting
> > >like a pull down.
> >
> > Do you have the RS232 levels going into the PIC
> > directly?
> > I hope not. Maybe I misunderstood?
> > Hang on... why are you using RB3 for serial comms?
> > You could just use the on-board UART couldn't you?
> > Do you have LV programming enabled & are using RB4?
> > Is this assembler code or a basic stamp type of
> > thing?
> > Regards...
> >
> > --
> > http://www.piclist.com hint: PICList Posts must
> > start with ONE topic:
> > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other
> > [BUY]:,[AD]: ->Ads
> >
> >
>
>
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>