@itemize @bullet
@item Copyright @copyright{} 2008 The OpenOCD Project
@item Copyright @copyright{} 2007-2008 Spencer Oliver @email{spen@@spen-soft.co.uk}
-@item Copyright @copyright{} 2008 Oyvind Harboe @email{oyvind.harboe@@zylin.com}
+@item Copyright @copyright{} 2008-2010 Oyvind Harboe @email{oyvind.harboe@@zylin.com}
@item Copyright @copyright{} 2008 Duane Ellis @email{openocd@@duaneellis.com}
@item Copyright @copyright{} 2009-2010 David Brownell
@end itemize
other one is used to provide a debug adapter.
Also, some development boards integrate an FT2232 chip to serve as
-a built-in low coast debug adapter and usb-to-serial solution.
+a built-in low cost debug adapter and usb-to-serial solution.
@itemize @bullet
@item @b{usbjtag}
JIM-Tcl commands, and (older) the orginal command interpreter.
@item @b{Commands}
-@* At the OpenOCD telnet command line (or via the GDB mon command) one
+@* At the OpenOCD telnet command line (or via the GDB monitor command) one
can type a Tcl for() loop, set variables, etc.
Some of the commands documented in this guide are implemented
as Tcl scripts, from a @file{startup.tcl} file internal to the server.
@end deffn
@deffn Command {interface_list}
-List the interface drivers that have been built into
+List the debug adapter drivers that have been built into
the running copy of OpenOCD.
@end deffn
+@deffn Command {interface transports} transport_name+
+Specifies the transports supported by this debug adapter.
+The adapter driver builds-in similar knowledge; use this only
+when external configuration (such as jumpering) changes what
+the hardware can support.
+@end deffn
+
-@deffn Command {jtag interface}
-Returns the name of the interface driver being used.
+
+@deffn Command {adapter_name}
+Returns the name of the debug adapter driver being used.
@end deffn
@section Interface Drivers
@deffn {Interface Driver} {ZY1000}
This is the Zylin ZY1000 JTAG debugger.
+@end deffn
@quotation Note
This defines some driver-specific commands,
No arguments: print status.
@end deffn
-@end deffn
+@section Transport Configuration
+As noted earlier, depending on the version of OpenOCD you use,
+and the debug adapter you are using,
+several transports may be available to
+communicate with debug targets (or perhaps to program flash memory).
+@deffn Command {transport list}
+displays the names of the transports supported by this
+version of OpenOCD.
+@end deffn
+
+@deffn Command {transport select} transport_name
+Select which of the supported transports to use in this OpenOCD session.
+The transport must be supported by the debug adapter hardware and by the
+version of OPenOCD you are using (including the adapter's driver).
+No arguments: print selected transport..
+@end deffn
+
+@subsection JTAG Transport
+JTAG is the original transport supported by OpenOCD, and most
+of the OpenOCD commands support it.
+JTAG transports expose a chain of one or more Test Access Points (TAPs),
+each of which must be explicitly declared.
+JTAG supports both debugging and boundary scan testing.
+Flash programming support is built on top of debug support.
+@subsection SWD Transport
+SWD (Serial Wire Debug) is an ARM-specific transport which exposes one
+Debug Access Point (DAP, which must be explicitly declared.
+(SWD uses fewer signal wires than JTAG.)
+SWD is debug-oriented, and does not support boundary scan testing.
+Flash programming support is built on top of debug support.
+(Some processors support both JTAG and SWD.)
+@subsection SPI Transport
+The Serial Peripheral Interface (SPI) is a general purpose transport
+which uses four wire signaling. Some processors use it as part of a
+solution for flash programming.
@anchor{JTAG Speed}
@section JTAG Speed
@item @code{arm11} -- this is a generation of ARMv6 cores
@item @code{arm720t} -- this is an ARMv4 core with an MMU
@item @code{arm7tdmi} -- this is an ARMv4 core
-@item @code{arm920t} -- this is an ARMv5 core with an MMU
+@item @code{arm920t} -- this is an ARMv4 core with an MMU
@item @code{arm926ejs} -- this is an ARMv5 core with an MMU
@item @code{arm966e} -- this is an ARMv5 core
@item @code{arm9tdmi} -- this is an ARMv4 core
mychip.cpu configure -event gdb-attach my_attach_proc
mychip.cpu configure -event gdb-attach @{
echo "Reset..."
- reset halt
+ # To make flash probe and gdb load to flash work we need a reset init.
+ reset init
@}
@end example
@* Currently not used (goal: when JTAG examine starts)
@end ignore
@item @b{gdb-attach}
-@* When GDB connects
+@* When GDB connects. This is before any communication with the target, so this
+can be used to set up the target so it is possible to probe flash. Probing flash
+is necessary during gdb connect if gdb load is to write the image to flash. Another
+use of the flash memory map is for GDB to automatically hardware/software breakpoints
+depending on whether the breakpoint is in RAM or read only memory.
@item @b{gdb-detach}
@* When GDB disconnects
@item @b{gdb-end}
The @var{num} parameter is a value shown by @command{flash banks}.
@end deffn
-@deffn Command {flash erase_address} [@option{pad}] address length
+@deffn Command {flash erase_address} [@option{pad}] [@option{unlock}] address length
Erase sectors starting at @var{address} for @var{length} bytes.
Unless @option{pad} is specified, @math{address} must begin a
flash sector, and @math{address + length - 1} must end a sector.
the specified length must stay within that bank.
As a special case, when @var{length} is zero and @var{address} is
the start of the bank, the whole flash is erased.
+If @option{unlock} is specified, then the flash is unprotected
+before erase starts.
@end deffn
@deffn Command {flash fillw} address word length
@deffn Command {flash info} num
Print info about flash bank @var{num}
The @var{num} parameter is a value shown by @command{flash banks}.
-The information includes per-sector protect status, which may be
-incorrect (outdated) unless you first issue a
-@command{flash protect_check num} command.
+This command will first query the hardware, it does not print cached
+and possibly stale information.
@end deffn
@anchor{flash protect}
The @var{num} parameter is a value shown by @command{flash banks}.
@end deffn
-@deffn Command {flash protect_check} num
-Check protection state of sectors in flash bank @var{num}.
-The @var{num} parameter is a value shown by @command{flash banks}.
-@comment @option{flash erase_sector} using the same syntax.
-This updates the protection information displayed by @option{flash info}.
-(Code execution may have invalidated any state records kept by OpenOCD.)
-@end deffn
-
@anchor{Flash Driver List}
@section Flash Driver List
As noted above, the @command{flash bank} command requires a driver name,
@end deffn
@end deffn
+@deffn {Flash Driver} virtual
+This is a special driver that maps a previously defined bank to another
+address. All bank settings will be copied from the master physical bank.
+
+The @var{virtual} driver defines one mandatory parameters,
+
+@itemize
+@item @var{master_bank} The bank that this virtual address refers to.
+@end itemize
+
+So in the following example addresses 0xbfc00000 and 0x9fc00000 refer to
+the flash bank defined at address 0x1fc00000. Any cmds executed on
+the virtual banks are actually performed on the physical banks.
+@example
+flash bank $_FLASHNAME pic32mx 0x1fc00000 0 0 0 $_TARGETNAME
+flash bank vbank0 virtual 0xbfc00000 0 0 0 $_TARGETNAME $_FLASHNAME
+flash bank vbank1 virtual 0x9fc00000 0 0 0 $_TARGETNAME $_FLASHNAME
+@end example
+@end deffn
+
@subsection str9xpec driver
@cindex str9xpec
@section Other NAND commands
@cindex NAND other commands
-@deffn Command {nand check_bad_blocks} [offset length]
+@deffn Command {nand check_bad_blocks} num [offset length]
Checks for manufacturer bad block markers on the specified NAND
device. If no parameters are provided, checks the whole
device; otherwise, starts at the specified @var{offset} and
@xref{Running}.
@end deffn
-@deffn Command fast (@option{enable}|@option{disable})
-Default disabled.
-Set default behaviour of OpenOCD to be "fast and dangerous".
-
-At this writing, this only affects the defaults for two ARM7/ARM9 parameters:
-fast memory access, and DCC downloads. Those parameters may still be
-individually overridden.
-
-The target specific "dangerous" optimisation tweaking options may come and go
-as more robust and user friendly ways are found to ensure maximum throughput
-and robustness with a minimum of configuration.
-
-Typically the "fast enable" is specified first on the command line:
-
-@example
-openocd -c "fast enable" -c "interface dummy" -f target/str710.cfg
-@end example
-@end deffn
-
@deffn Command echo message
Logs a message at "user" priority.
Output @var{message} to stdout.
@end deffn
@anchor{load_image}
-@deffn Command {load_image} filename address [@option{bin}|@option{ihex}|@option{elf}]
-Load image from file @var{filename} to target memory at @var{address}.
+@deffn Command {load_image} filename address [[@option{bin}|@option{ihex}|@option{elf}] @option{min_addr} @option{max_length}]
+Load image from file @var{filename} to target memory offset by @var{address} from its load address.
The file format may optionally be specified
-(@option{bin}, @option{ihex}, or @option{elf})
+(@option{bin}, @option{ihex}, or @option{elf}).
+In addition the following arguments may be specifed:
+@var{min_addr} - ignore data below @var{min_addr} (this is w.r.t. to the target's load address + @var{address})
+@var{max_length} - maximum number of bytes to load.
+@example
+proc load_image_bin @{fname foffset address length @} @{
+ # Load data from fname filename at foffset offset to
+ # target at address. Load at most length bytes.
+ load_image $fname [expr $address - $foffset] bin $address $length
+@}
+@end example
@end deffn
@deffn Command {test_image} filename [address [@option{bin}|@option{ihex}|@option{elf}]]
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