Laitr Keiows: a note about forum topic

Laitr Keiows — Mon, 11 Jan 2010 09:04:06 GMT

a note about forum topic

← Older revision		Revision as of 09:04, 11 January 2010
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	* Writing to the flash with JTAG has not been tested.		* Writing to the flash with JTAG has not been tested.
	* Bridging C228 instead of C227 activates another JTAG target with ID 0x5182 instead of 0x7926. One pin is probably JT_TMS_CPU and the other JT_TMS_CORE (from the Marvel 88F5182 datasheets). Apparently both cannot be active simultaneously.		* Bridging C228 instead of C227 activates another JTAG target with ID 0x5182 instead of 0x7926. One pin is probably JT_TMS_CPU and the other JT_TMS_CORE (from the Marvel 88F5182 datasheets). Apparently both cannot be active simultaneously.
		+	* See also this topic: http://forum.buffalo.nas-central.org/viewtopic.php?f=61&t=20726

Pabr: Instructions for adding a JTAG port to the LS MINI

Pabr — Thu, 24 Sep 2009 08:57:14 GMT

Instructions for adding a JTAG port to the LS MINI

New page

{{Articles|Hardware|LS-WSGL/R1}}
[[Image:LS_WSGL.jpg|thumb|right|Linkstation Mini]]

=Instructions=
[[Image:lsmini_jtag_top.jpg|thumb|100px|CN7 and C227]]
[[Image:lsmini_jtag_bottom.jpg|thumb|100px|Vias under C25]]
* Add a 10-pin JTAG connector at the pads labeled CN7. The pin numbering is the same as CN3 on [[Install_a_JTAG_Port]].
* Bridge TMS at the two pads labeled C227 on the top side, near the CPU.
* Bridge TDO under C25 on the bottom side, near CN7.

=Result=
<pre>
Open On-Chip Debugger
> reset
JTAG tap: feroceon.cpu tap/device found: 0x07926041 (mfg: 0x020, part: 0x7926, ver: 0x0)
JTAG Tap/device matched
> halt
target state: halted
target halted in ARM state due to debug-request, current mode: Supervisor
cpsr: 0x800000d3 pc: 0x00f3aac0
MMU: disabled, D-Cache: disabled, I-Cache: enabled
> flash probe 0
Flash Manufacturer/Device: 0x00bf 0x00d6
flash 'cfi' found at 0xfffc0000
> dump_image currentcontents.bin 0xfffc0000 0x40000
dumped 262144 byte in 156.199112s
</pre>

=Notes=
* This procedure has been tested on only one unit. Someone please confirm.
* Writing to the flash with JTAG has not been tested.
* Bridging C228 instead of C227 activates another JTAG target with ID 0x5182 instead of 0x7926. One pin is probably JT_TMS_CPU and the other JT_TMS_CORE (from the Marvel 88F5182 datasheets). Apparently both cannot be active simultaneously.

LS Mini: Add a JTAG port - Revision history

Laitr Keiows: a note about forum topic

Pabr: Instructions for adding a JTAG port to the LS MINI