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Add FTDI SWD driver 58/1958/7
authorAndreas Fritiofson <andreas.fritiofson@gmail.com>
Sat, 10 May 2014 09:31:49 +0000 (11:31 +0200)
committerAndreas Fritiofson <andreas.fritiofson@gmail.com>
Sat, 28 Jun 2014 09:34:26 +0000 (09:34 +0000)
commitcdd8928a560252e3c7f11911864fe01a1864a0bf
treee5617c53ad2e63204ab687115542487c9d6c2666tree | snapshot
parentcc99e57b0e8ed3672afce1925142863cceb809f2commit | diff
Add FTDI SWD driver

This is usable on most or all FTDI adapters using a small hardware tweak.

TCK goes to SWCLK as expected. TDO should be wired to SWDIO. For TDI there
are two options:

Either add a 74HC126 or similar tri-state buffer between TDI and SWDIO,
with OE controlled by a signal named SWDIO_OE. Or simply connect TDI and
SWDIO together via a suitable resistor (220-470 ohms or so depending on
the drive capability of the target and adapter).

nSRST (and of course Vcc, GND) may be connected too but all other signals
should be NC.

Change-Id: Id36cf4577439be96bd4e5955c3026236e1cabced
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1958
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
src/jtag/drivers/ftdi.c diff | blob | history
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