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Driver for USB-JTAG, Altera USB-Blaster and compatibles

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The 10-pin JTAG layout used with these adapters is used by
a variety of platforms including AVR.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Catalin Patulea
2009-12-26 15:05:06 -08:00
committed by David Brownell
parent 900d745567
commit 84dbf8ab5a
9 changed files with 709 additions and 1 deletions
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59
doc/openocd.texi
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@@ -310,6 +310,25 @@ chips are starting to become available in JTAG adapters.
@* Link @url{http://www.hitex.com/index.php?id=cortino}
@end itemize
@section USB-JTAG / Altera USB-Blaster compatibles
These devices also show up as FTDI devices, but are not
protocol-compatible with the FT2232 devices. They are, however,
protocol-compatible among themselves. USB-JTAG devices typically consist
of a FT245 followed by a CPLD that understands a particular protocol,
or emulate this protocol using some other hardware.
They may appear under different USB VID/PID depending on the particular
product. The driver can be configured to search for any VID/PID pair
(see the section on driver commands).
@itemize
@item @b{USB-JTAG} Kolja Waschk's USB Blaster-compatible adapter
@* Link: @url{http://www.ixo.de/info/usb_jtag/}
@item @b{Altera USB-Blaster}
@* Link: @url{http://www.altera.com/literature/ug/ug_usb_blstr.pdf}
@end itemize
@section USB JLINK based
There are several OEM versions of the Segger @b{JLINK} adapter. It is
an example of a micro controller based JTAG adapter, it uses an
@@ -1989,6 +2008,46 @@ ft2232_vid_pid 0x0403 0xbdc8
@end example
@end deffn
@deffn {Interface Driver} {usb_blaster}
USB JTAG/USB-Blaster compatibles over one of the userspace libraries
for FTDI chips. These interfaces have several commands, used to
configure the driver before initializing the JTAG scan chain:
@deffn {Config Command} {usb_blaster_device_desc} description
Provides the USB device description (the @emph{iProduct string})
of the FTDI FT245 device. If not
specified, the FTDI default value is used. This setting is only valid
if compiled with FTD2XX support.
@end deffn
@deffn {Config Command} {usb_blaster_vid_pid} vid pid
The vendor ID and product ID of the FTDI FT245 device. If not specified,
default values are used.
Currently, only one @var{vid}, @var{pid} pair may be given, e.g. for
Altera USB-Blaster (default):
@example
ft2232_vid_pid 0x09FB 0x6001
@end example
The following VID/PID is for Kolja Waschk's USB JTAG:
@example
ft2232_vid_pid 0x16C0 0x06AD
@end example
@end deffn
@deffn {Command} {usb_blaster} (@option{pin6}|@option{pin8}) (@option{0}|@option{1})
Sets the state of the unused GPIO pins on USB-Blasters (pins 6 and 8 on the
female JTAG header). These pins can be used as SRST and/or TRST provided the
appropriate connections are made on the target board.
For example, to use pin 6 as SRST (as with an AVR board):
@example
$_TARGETNAME configure -event reset-assert \
"usb_blaster pin6 1; wait 1; usb_blaster pin6 0"
@end example
@end deffn
@end deffn
@deffn {Interface Driver} {gw16012}
Gateworks GW16012 JTAG programmer.
This has one driver-specific command: