j-link 14 pin connector on DRAC

VDD 3V3	 1 2  GND
nTRST	 3 4  GND
TDI	 5 6  GND ? not GND
TMS	 7 8  GND
TCK	 9 10 GND
TDO	11 12 nSRST
VDD	13 14 GND


# N2530/SP2.0E

pi@rpi4:~/openocd-rpi2-stm32/openocd $ ./src/openocd -f ../rpi4-jtag.cfg
Open On-Chip Debugger 0.11.0-rc1+dev-00010-gc69b4deae-dirty (2021-01-05-15:40)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
jtag
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : BCM2835 GPIO JTAG/SWD bitbang driver
Info : clock speed 100 kHz
Warn : There are no enabled taps.  AUTO PROBING MIGHT NOT WORK!!
Info : JTAG tap: auto0.tap tap/device found: 0x18150121 (mfg: 0x090 (Chip Express), part: 0x8150, ver: 0x1)
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 3 -expected-id 0x18150121"
Warn : gdb services need one or more targets defined


# N2530/SP2.0D

pi@rpi4:~/openocd-rpi2-stm32/openocd $ ./src/openocd -f ../rpi4-jtag.cfg
Open On-Chip Debugger 0.11.0-rc1+dev-00010-gc69b4deae-dirty (2021-01-05-15:40)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
jtag
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : BCM2835 GPIO JTAG/SWD bitbang driver
Info : clock speed 100 kHz
Warn : There are no enabled taps.  AUTO PROBING MIGHT NOT WORK!!
Info : JTAG tap: auto0.tap tap/device found: 0x18150121 (mfg: 0x090 (Chip Express), part: 0x8150, ver: 0x1)
Warn : Unexpected idcode after end of chain: 288 0x00007fff
Warn : Unexpected idcode after end of chain: 320 0x00000000
Warn : Unexpected idcode after end of chain: 352 0x00000000
Warn : Unexpected idcode after end of chain: 384 0x00000000
Warn : Unexpected idcode after end of chain: 416 0x00000000
Warn : Unexpected idcode after end of chain: 448 0x00000000
Warn : Unexpected idcode after end of chain: 480 0x00000000
Warn : Unexpected idcode after end of chain: 512 0x00000000
Warn : Unexpected idcode after end of chain: 544 0x00000000
Warn : Unexpected idcode after end of chain: 576 0x00000000
Warn : Unexpected idcode after end of chain: 608 0x00000000
Warn : Unexpected idcode after end of chain: 640 0x00000000
Error: double-check your JTAG setup (interface, speed, ...)
Error: Trying to use configured scan chain anyway...
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 2 -expected-id 0x18150121"
Error: auto0.tap: IR capture error; saw 0x0000 not 0x0001
Warn : Bypassing JTAG setup events due to errors
Warn : gdb services need one or more targets defined