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interface/ftdi/olimex-arm-usb-ocd-h: fix nTRST control definition 

According to my inspection of an Olimex ARM-USB-OCD-H adapter ACBUS0
is connected directly to an SN74LVC2T45 buffer input B2, and the
corresponding output A2 is connected directly to the JTAG
connector. It seems the information in the Olimex flyer is incorrect
for the -H version and TRST can't be tri-stated, ACBUS2 is unused.

The older ARM-USB-OCD device has SN74AC244 for an output buffer and
ACBUS2 controls its !2OE, ACBUS0 connected to 2A1 (2Y1 is nTRST), in
accordance with the information flyer.

Change-Id: I22828b7b959b6f62c3f51367feb8fab9705641e5
Reported-by: Tim Sander <tim@krieglstein.org>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2286
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-by: Tim Sander <tim@krieglstein.org>
This commit is contained in:
Paul Fertser 2014-09-10 12:29:23 +04:00 committed by Spencer Oliver
parent 61d8b2cabf
commit 44394c2a77
1 changed files with 2 additions and 2 deletions
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4
tcl/interface/ftdi/olimex-arm-usb-ocd-h.cfg
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@ -8,7 +8,7 @@ interface ftdi
ftdi_device_desc "Olimex OpenOCD JTAG ARM-USB-OCD-H"
ftdi_vid_pid 0x15ba 0x002b
ftdi_layout_init 0x0c08 0x0f1b
ftdi_layout_init 0x0908 0x0b1b
ftdi_layout_signal nSRST -oe 0x0200
ftdi_layout_signal nTRST -data 0x0100 -noe 0x0400
ftdi_layout_signal nTRST -data 0x0100
ftdi_layout_signal LED -data 0x0800