Hi Wojtek, Hi Wouter

  Wouter, as you see, the same problem and other people !

  Wojtek, first release of wloader it works on standard
communication pins of 877 RC6 and RC7  , this is not available
now from Wouter's page. As my tests on various computers and
232 interfaces
( 16450, 16550 ) shows the problem is not the interface but delays
between receive and send command bit's ( and sometimes the
levels of signals on Rx-Tx pic pin ) . So I thinked also at your
solution...I'm currently using a non-inverting RS232 made from
1488 and 1489 tied together through a diode to PIC communication
pin and a 1nF capacitor to ground. But as I told you it doesn't work
correctly only on some computers ( I've tested on 5 different
computers...)
  Vasile



On 6 Aug 00, at 10:14, Wojtek Zabolotny wrote:


> On Sun, Aug 06, 2000 at 01:02:29AM +0200, Wojtek Zabolotny wrote:
> >
> > This is the proposed interface:
> >                  _____________
> > RS232 input  ----|RIN1  ROUT1|--- PIC RC7/RX
> > RS232 output ----|TOUT1  TIN1|--- PIC RC6/TX
> >                  |           |
> > RS in (to PC)----|RIN2  ROUT2|---+====+--+
> >                  |           |  R1 (10k) |
> > RS out(to PC)----|TOUT2  TIN2|-----------+--- PIC E2 (WLoader PIN)
> >                  -------------
> >                     MAX232
>
> Ooops, I've forgotten about the pull-up:
>
>  So it should look out like this:
>                    _____________
>   RS232 input  ----|RIN1  ROUT1|--- PIC RC7/RX
>   RS232 output ----|TOUT1  TIN1|--- PIC RC6/TX
>                    |           |
>   RS in (to PC)--+-|RIN2  ROUT2|---+====+--+
>         R2 (4k7) | |           |  R1 (10k) |
> +5V-|>|-+====+---+ |           |
>   RS out(to PC)----|TOUT2  TIN2|-----------+--- PIC E2 (WLoader PIN)
>                    -------------
>                      MAX232
>
> --
>                         Wojciech Zabolotny
>                         http://www.ise.pw.edu.pl/~wzab
>
> When buying any hardware, ask the dealer if it is Open Source friendly!!!
> http://www.openhardware.org
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements


****************************************
Surducan Vasile
email:vasile@l30.itim-cj.ro
URL:http://www.geocities.com/vsurducan
****************************************

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