Re: Spartan3 JTAG flash In System Programming over Ethernet

On Apr 7, 6:18 pm, n...@xxxxxxxxxxx (Nico Coesel) wrote:

Something that would be really nice is a parallel port programmer.
With a huge twist... Years ago I've build an eprom emulator which
simply simulates a printer. Configuring it is a matter of printing
text commands. Downloading the hex file is simply a matter of printing
it. No device drivers whatsoever are required. It will work with USB
to parallel converters (including the crappy ones). There is full flow
control as well and it is bleeding fast. It amazes me no-one ever came
up with something like that.

Shouldn't be too hard for passive serial / slave serial modes -
just a little logic on the LPT strobe and 1 data bit (using all bits
and
a shift register would be tempting, but then you'd need an appropriate
local clock, the speed of which may need to detect the strobe speed
somehow).

Where this breaks down is trying to do JTAG when you don't know the
commands - for example,
trying to run one of Altera's JAM files that's looking for a response
beyond just monitoring a status
bit infrequetly.

Also, in this day and age, simply dumping strobed bytes out the LPT is
going to require a driver.
And a USB to parallel converter is going to require a driver...
Figure that you may still need some
level translation, and something based on a cypress fx2 USB micro may
make more sense.
.

Relevant Pages

  • hardly any summits will be supporting elder greens
    ... Some commands ... arrangement rarely reports Gul, it integrates Muhammad instead. ... He should elect fit rooms no matter how the current suspicious ...
    (sci.crypt)
  • Re: printing command language
    ... I am eager to know what printing command language such printer use. ... Whether the printing printing programs can ... use them is a relation of good the program is and how many commands ...
    (comp.periphs.printers)
  • Re: [opensuse] Firefox 3.x will not print
    ... I had the same problem with firefox. ...  the correct page size before printing. ... To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx ... For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx ...
    (SuSE)
  • Re: Printing Halftone Problem
    ... Some non-Postscript printers do it no matter what. ... handy for printing color documents where the ... > a HP LaserJet 1100 black and white printer. ... > its just the fonts that I am having a problem with. ...
    (microsoft.public.publisher)
  • Re: TASM Matrix question
    ... > project no matter how poorly written it is so the pressure is off and I ... > have time to actually learn about differnet commands... ...
    (alt.lang.asm)