Commit 8f9f5c18 authored by zwelch's avatar zwelch
Browse files

David Brownell <david-b@pacbell.net>:

The PLD stuff hasn't been documented yet.  It's just Virtex2 for now,
but it looks like adding others would be easy.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2273 b42882b7-edfa-0310-969c-e2dbd0fdcd60
parent 1642dd2e
......@@ -73,6 +73,7 @@ Free Documentation License''.
* CPU Configuration:: CPU Configuration
* Flash Commands:: Flash Commands
* NAND Flash Commands:: NAND Flash Commands
* PLD/FPGA Commands:: PLD/FPGA Commands
* General Commands:: General Commands
* Architecture and Core Commands:: Architecture and Core Commands
* JTAG Commands:: JTAG Commands
......@@ -3981,6 +3982,62 @@ or @code{read_page} methods, so @command{nand raw_access} won't
change any behavior.
@end deffn
@node PLD/FPGA Commands
@chapter PLD/FPGA Commands
@cindex PLD
@cindex FPGA
Programmable Logic Devices (PLDs) and the more flexible
Field Programmable Gate Arrays (FPGAs) are both types of programmable hardware.
OpenOCD can support programming them.
Although PLDs are generally restrictive (cells are less functional, and
there are no special purpose cells for memory or computational tasks),
they share the same OpenOCD infrastructure.
Accordingly, both are called PLDs here.
@section PLD/FPGA Configuration and Commands
As it does for JTAG TAPs, debug targets, and flash chips (both NOR and NAND),
OpenOCD maintains a list of PLDs available for use in various commands.
Also, each such PLD requires a driver.
They are referenced by the number shown by the @command{pld devices} command,
and new PLDs are defined by @command{pld device driver_name}.
@deffn {Config Command} {pld device} driver_name tap_name [driver_options]
Defines a new PLD device, supported by driver @var{driver_name},
using the TAP named @var{tap_name}.
The driver may make use of any @var{driver_options} to configure its
behavior.
@end deffn
@deffn {Command} {pld devices}
Lists the PLDs and their numbers.
@end deffn
@deffn {Command} {pld load} num filename
Loads the file @file{filename} into the PLD identified by @var{num}.
The file format must be inferred by the driver.
@end deffn
@section PLD/FPGA Drivers, Options, and Commands
Drivers may support PLD-specific options to the @command{pld device}
definition command, and may also define commands usable only with
that particular type of PLD.
@deffn {FPGA Driver} virtex2
Virtex-II is a family of FPGAs sold by Xilinx.
It supports the IEEE 1532 standard for In-System Configuration (ISC).
No driver-specific PLD definition options are used,
and one driver-specific command is defined.
@deffn {Command} {virtex2 read_stat} num
Reads and displays the Virtex-II status register (STAT)
for FPGA @var{num}.
@end deffn
@end deffn
@node General Commands
@chapter General Commands
@cindex commands
......
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