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// This file is part of the Doxygen Developer Manual
/** @page tasks Pending and Open Tasks

This page lists pending and open tasks being considered or worked upon
by the OpenOCD community.

@section thelist The List

Most items are open for the taking, but please post to the mailing list
before spending much time working on anything lists here.  The community
may have evolved an idea since it was added here.

Feel free to send patches to add or clarify items on this list, too.

@section thelisttcl TCL

This section provides possible things to improve with OpenOCD's TCL support.

- Fix problem with incorrect line numbers reported for a syntax
  error in a reset init event.

- organize the TCL configurations:
  - provide more directory structure for boards/targets?
  - factor configurations into layers (encapsulation and re-use)

- Fix handling of variables between multiple command line "-c" and "-f"
  parameters.  Currently variables assigned through one such parameter
  command/script are unset before the next one is invoked.

- Isolate all TCL command support:
  - Pure C CLI implementations using --disable-builtin-tcl.
    - Allow developers to build new dongles using OpenOCD's JTAG core.
    - At first, provide only low-level JTAG support; target layer and
      above rely heavily on scripting event mechanisms.
  - Allow full TCL support? add --with-tcl=/path/to/installed/tcl
  - Move TCL support out of foo.[ch] and into foo_tcl.[ch] (other ideas?)
    - See src/jtag/core.c and src/jtag/tcl.c for an example.
    - allow some of these TCL command modules to be dynamically loadable?

@section thelistjtag JTAG

This section list issues that need to be resolved in the JTAG layer.

@subsection thelistjtagcore JTAG Core

The following tasks have been suggested for cleaning up the JTAG layer:

- use tap_set_state everywhere to allow logging TAP state transitions
- Encapsulate cmd_queue_cur_state and related variable handling.
- add slick 32 bit versions of jtag_add_xxx_scan() that avoids
buf_set_u32() calls and other evidence of poor impedance match between
API and calling code. New API should cut down # of lines in calling
code by 100's and make things clearer. Also potentially be supported
directly in minidriver API for better embedded host performance.

The following tasks have been suggested for adding new core JTAG support:

- Improve autodetection of TAPs by supporting tcl escape procedures that
  can configure discovered TAPs based on IDCODE value ... they could:
    - Remove guessing for irlen
    - Allow non-default irmask/ircapture values
- SPI/UART emulation:
  - (ab)use bit-banging JTAG interfaces to emulate SPI/UART
  - allow SPI to program flash, MCUs, etc.

@subsection thelistjtaginterfaces JTAG Interfaces

There are some known bugs to fix in JTAG adapter drivers:

- For JTAG_STATEMOVE to TAP_RESET, all drivers must ignore the current
  recorded state.  The tap_get_state() call won't necessarily return
  the correct value, especially at server startup.  Fix is easy:  in
  that case, always issue five clocks with TMS high.
  - amt_jtagaccel.c
  - arm-jtag-ew.c
  - bitbang.c
  - bitq.c
  - gw16012.c
  - jlink.c
  - usbprog.c
  - vsllink.c
  - rlink/rlink.c
- bug: USBprog is broken with new tms sequence; it needs 7-clock cycles.
  Fix promised from  Peter Denison openwrt at marshadder.org
  Workaround: use "tms_sequence long" @par
  https://lists.berlios.de/pipermail/openocd-development/2009-July/009426.html

The following tasks have been suggested for improving OpenOCD's JTAG
interface support:

- rework USB communication to be more robust.  Two possible options are:
  -# use libusb-1.0.1 with libusb-compat-0.1.1 (non-blocking I/O wrapper)
  -# rewrite implementation to use non-blocking I/O
- J-Link driver:
  - fix to work with long scan chains, such as R.Doss's svf test.
- FT2232 (libftdi):


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