Re: [Uisp-dev] Bug in uisp?

[Jason Kyle]

At 13:29 02/03/2004 +0100, Joakim Arfvidsson wrote:
> I will try to find another adapter...
>
> I can send an entire program of any size before it fails. Also, sometimes 
> I can actually do a second transfer before failing... about 1 time in 10.
>
> If the timeout is more than a #define in the source I won't have any 
> chance trying to change it:)

It's fairly embedded into the code, isn't just a define but is quite visible.


Send data routine (Serial.C):
int TSerial::Send(unsigned char* queue, int queue_size, int rec_queue_size,
                  int timeout)

There is a timeout parameter and it's set according to the operation, 
although it appears to be in seconds so my theory is probably not valid.

For a laugh, and maybe a result?, edit the file uisp/src/AvrAtmel.C and 
-everywhere- you see something -like- Send(set_device, 2, 1)  change the 
*last* number to 1 or 2 more  i.e. Send(set_device, 2, 2)  then recompile 
and see what happens.

Jason


> Thanks,
> Joakim Arfvidsson
>
>
>
> On 2004-03-01, at 21.51, Jason Kyle wrote:
>
> > At 08:51 29/02/2004 +0100, Joakim Arfvidsson wrote:
> > > I'm using uisp (version 20030618) with Mac OS X 10.3.2 and an Aten 
> > > USB-serial converter. I do not know the chipset of that converter. I 
> > > have a home-made AVR910 programmer connected to the serial port.
> > >
> > > The problem I'm having is that I need to pull and reconnect the 
> > > USB-serial converter to the mac between almost every transfer! Sometimes 
> > > it works for several transfers. Even a small chat with the programmer 
> > > getting the list of programmable chips counts in this respect.
> > >
> > > The error message is "Programmer not responding". I can always do echo
> >
> > All USB-Serial adapters won't send received serial data back to the host 
> > for some period of ms (minimum is 1ms, some are as high as 16ms), or when 
> > the FIFO buffer is full.  What this means for AVR910 programmers is the 
> > response characters are often delayed and uisp may have some fixed timimg 
> > parameters which only work properly with real UARTs.  Probably something 
> > that could be tweeked.
> >
> > Try a different USB-Serial adapter and/or check carefully that the "send 
> > not-full FIFO delay" is as short as possible.  Failing that switch to an 
> > STK500 compatiable programmer.
> >
> > Jason Kyle
> >
> >
> >
> >
> > _______________________________________________
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> > http://mail.nongnu.org/mailman/listinfo/uisp-dev
>
>
>
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