about CH341A programmer

Здравствуйте, .

Sorry, Please tell me about: how add support for this programmer in flashrom?

If  you  can  -  please  tell  me  "example" how USB device parallel add in
flashrom.

or other links to support any usb devices in flashrom..

CH341A usb chip:
http://www.seekic.com/circuit_diagram/Basic_Circuit/USB_to_parallel_serial_c...

ebay CH341A programmer

[Stefan Tauner]

On Tue, 6 Jan 2015 05:20:22 +0500
[e-mail] wrote:
> Здравствуйте, .
>
> Sorry, Please tell me about: how add support for this programmer in flashrom?
>
> If  you  can  -  please  tell  me  "example" how USB device parallel add in
> flashrom.
>
> or other links to support any usb devices in flashrom..
>
> CH341A usb chip:
> http://www.seekic.com/circuit_diagram/Basic_Circuit/USB_to_parallel_serial_c...

There is not much information available about that chip. The available
English datasheets do not cover the most important part: the
communication protocol between the chip and the host. Without that it
is not exactly trivial to add support for it in flashrom. One has to
reverse engineer the protocol first. Members of the flashrom community
have done that for the Dediprog SF100 once but they are no longer
active, so please don't expect it to be done. dediprog.c is probably
the most similar programmer flashrom currently supports because it is
the only one that uses a completely custom USB protocol.

Здравствуйте, Stefan.

Вы писали 7 января 2015 г., 0:31:04:

I   can   write  to  log  usb activity with operations with CH341A usb
programmer from original 1.18 software with operation read, write..

this log is very happy with support of CH341A in flashrom?
> On Tue, 6 Jan 2015 05:20:22 +0500
> [e-mail] wrote:
> > Здравствуйте, .
> >
> > Sorry, Please tell me about: how add support for this programmer in flashrom?
> >
> > If  you  can  -  please  tell  me  "example" how USB device parallel add in
> > flashrom.
> >
> > or other links to support any usb devices in flashrom..
> >
> > CH341A usb chip:
> > http://www.seekic.com/circuit_diagram/Basic_Circuit/USB_to_parallel_serial_c...
> There is not much information available about that chip. The available
> English datasheets do not cover the most important part: the
> communication protocol between the chip and the host. Without that it
> is not exactly trivial to add support for it in flashrom. One has to
> reverse engineer the protocol first. Members of the flashrom community
> have done that for the Dediprog SF100 once but they are no longer
> active, so please don't expect it to be done. dediprog.c is probably
> the most similar programmer flashrom currently supports because it is
> the only one that uses a completely custom USB protocol.

Здравствуйте, Stefan.

Вы писали 7 января 2015 г., 0:31:04:

also, for reverse ingeneering help:

https://github.com/commandtab/ch341eeprom/blob/master/ch341docs/CH341DS1.PDF
> On Tue, 6 Jan 2015 05:20:22 +0500
> [e-mail] wrote:
> > Здравствуйте, .
> >
> > Sorry, Please tell me about: how add support for this programmer in flashrom?
> >
> > If  you  can  -  please  tell  me  "example" how USB device parallel add in
> > flashrom.
> >
> > or other links to support any usb devices in flashrom..
> >
> > CH341A usb chip:
> > http://www.seekic.com/circuit_diagram/Basic_Circuit/USB_to_parallel_serial_c...
> There is not much information available about that chip. The available
> English datasheets do not cover the most important part: the
> communication protocol between the chip and the host. Without that it
> is not exactly trivial to add support for it in flashrom. One has to
> reverse engineer the protocol first. Members of the flashrom community
> have done that for the Dediprog SF100 once but they are no longer
> active, so please don't expect it to be done. dediprog.c is probably
> the most similar programmer flashrom currently supports because it is
> the only one that uses a completely custom USB protocol.