tcl: Add interface config for isodebug isolated JTAG/SWD+UART

Currently only used internally at Unjo.

Change-Id: I7786e95e1bd755a73156ecad5b6d7f6273d8ddef
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/5251
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

diff --git a/tcl/interface/ftdi/isodebug.cfg b/tcl/interface/ftdi/isodebug.cfg
new file mode 100644 (file)
index 0000000..ead2864
--- /dev/null
+++ b/tcl/interface/ftdi/isodebug.cfg
@@ -0,0 +1,27 @@
+# isodebug v1
+# 5 kV isolated JTAG/SWD + UART adapter by Unjo AB
+
+adapter driver ftdi
+ftdi_vid_pid 0x22b7 0x150d
+
+ftdi_layout_init 0x0ff8 0xfffb
+
+ftdi_layout_signal LED -ndata 0x0100
+ftdi_layout_signal nTRST -data 0x0200
+ftdi_layout_signal nSRST -noe 0x0400
+ftdi_layout_signal SWDIO_OE -data 0x0008
+
+# Mode signals, either of these needs to be high to drive the JTAG/SWD pins.
+# The power-on state is low for both signals but the init setting above sets
+# JTAG_EN high.
+ftdi_layout_signal SWD_EN -data 0x1000
+ftdi_layout_signal JTAG_EN -data 0x0800
+
+# In SWD mode, the JTAG_EN signal doubles as SWO_EN_N which switches the
+# second FTDI channel UART RxD to the SWO pin instead of the separate RxD
+# pin. Note that the default init state has this pin high so when OpenOCD
+# starts in SWD mode, SWO is by default disabled. To enable SWO tracing,
+# issue the command 'ftdi_set_signal SWO_EN 1' where tracing is configured.
+# To switch back to using the separate UART, SWO_EN needs to be disabled
+# before exiting OpenOCD, or the adapter replugged.
+ftdi_layout_signal SWO_EN -nalias JTAG_EN