From 1b12488ce8b7c69968709b0c1c17975e519b0f5e Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Mon, 25 Apr 2011 21:23:00 -0400 Subject: Better debug port support. - gpio.h: afio_mapr_swj_config() renamed afio_cfg_debug_ports() - [new] wirish_debug.h: disableDebugPorts(), enableDebugPorts() - Maple, Maple Native, and Maple RET6 PIN_MAPs are now larger by 5, have mappings for the extra JTAG/SW pins. Documentation was updated appropriately. --- source/jtag.rst | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) (limited to 'source/jtag.rst') diff --git a/source/jtag.rst b/source/jtag.rst index 858021e..cc6d34a 100644 --- a/source/jtag.rst +++ b/source/jtag.rst @@ -1,11 +1,12 @@ +.. highlight:: cpp + .. _jtag: ====== JTAG ====== -.. TODO update adapter schematic, add information on using it with our -.. devices. +.. FIXME update adapter schematic, add better information JTAG is an interface for low-level debugging of digital devices. It gives instruction by instruction control over the microprocessor and @@ -37,32 +38,36 @@ Wiring Diagram to connect a standard 20-pin ARM JTAG device to the 8-pin JTAG port on the Maple. -The Maple has holes for a 8-pin JTAG header but that header is not -soldered on by default. If you know ahead of time that you'll be -needing it, and you order `straight from LeafLabs -`_, add a comment to your order and we can -probably solder one on for no charge. Otherwise, you can simply -attach standard 0.1" pitch male header pins (either the exact 4x2 -block or two 4-pin pieces of breakaway straight header). For a one-off -usage hack, the header can be jammed in the holes and twisted to -ensure electrical contact. +The Maple has holes for a 8-pin JTAG header, but that header is not +soldered on. To use JTAG, simply solder on standard 0.1" pitch male +header pins (either the exact 4 by 2 block, or two 4-pin pieces of +straight breakaway header). Compatible Devices ------------------ We have had good experience with the `Olimex ARM-USB-OCD `_ device, which costs -about 55 euro plus shipping (as of November 2010). +about €55 plus shipping (as of April 2011). + +Function Reference +------------------ + +You can disable or enable the JTAG and Serial Wire debugging ports in +software using the ``disableDebugPorts()`` and ``enableDebugPorts()`` +functions. + +* :ref:`lang-disabledebugports` +* :ref:`lang-enabledebugports` Recommended Reading ------------------- * `Wikipedia Article on Joint Test Action Group (JTAG) `_ -* `STM32/gdb/OpenOCD HOWTO `_ +* `STM32, GDB, OpenOCD How To `_ * STMicro documentation for STM32F103RB microcontroller: * `Datasheet `_ (pdf) * `Reference Manual `_ (pdf) -* There's a `thread on JTAG - `_ in our `forum`_ - which you may find useful. +* `LeafLabs Wiki JTAG How To `_ +* `Forum thread on JTAG `_ -- cgit v1.2.3