Hello,

MCLR was 8v regardless of a chip being there or not (I had a 10K
resistor to Vcc on the breadboard).  I tried a different PIC (both a
16F648 and a '628-4) in the Wisp, and now I'm getting 13V on MCLR, but
am running into protocol problems.

[sean@bob xwisp]$ ./xwisp.py go flash.hex
XWisp 1.08, command line mode
hardware: Wisp628 1.09 (fast)
target: 16f628, revision 00 (ID=07C0)
write Code 0000Traceback (most recent call last):
  File "./xwisp.py", line 3563, in ?
    XWisp_Main()
  File "./xwisp.py", line 3560, in XWisp_Main
    Wisp_Line().Interpret()
  File "./xwisp.py", line 3180, in Interpret
    self.Execute( Command )
  File "./xwisp.py", line 3162, in Execute
    exec( 'self.CMD_' + Command.upper() + '()' )
  File "<string>", line 1, in ?
  File "./xwisp.py", line 2595, in CMD_GO
    Regions = self.Selection )
  File "./xwisp.py", line 2250, in Write_Verify
    self.Write( Image, [ Region ], Warn = ( Region == Region_Fuses ) )
  File "./xwisp.py", line 2163, in Write
    self.Put( Address, Image.Get( Address ))
  File "./xwisp.py", line 2048, in Put
    self.Bus.Send_Expect(( '%04X' % Data ) + 'w' )
  File "./xwisp.py", line 915, in Send_Expect
    raise self.WBus_Protocol_Error, \
__main__.WBus_Protocol_Error: send='0185w' received='0185?'

As I understand it, the ? means it didn't understand the 'w' command.
AFAICT, I'm using the latest software on both the programmer and my
computer.

Thanks,

Sean

On Fri, 2004-07-30 at 22:57, Chetan Bhargava wrote:
> Hi,
>
> What is the voltage at MCLR without the target chip connected?
>
>
> On Fri, 30 Jul 2004 22:13:11 -0500, Sean A. Walberg <sean@ertw.com> wrote:
> > Hi,
> >
> > I've put together a Wisp628 which I can connect to, but it's unable to
> > read the ID off the target chip.  When I measure MCLR, it's at 8v
> > instead of the expected 13V.
> >
> > I've switched out all the parts in the charge pump, and even gone so far
> > as building a new board, but I get the same thing.
> >
> > The voltages on C6/7/8's positive terminals are 8, 9.5, and 9V
> > respectively while the pump is active.  While I see about 3V on pin 9 of
> > the PIC, I don't see anything on 6 or 5.  Since I don't have a scope, I
> > don't know if those last numbers are meaningful, though.

--
Sean A. Walberg <sean@ertw.com>                 http://www.ertw.com

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