JTAG beagle bone black with buspirate and openocd

[devar...@gmail.com]

Hello

I am very new to JTAG and i am trying to do the setup for jtag in beaglebone black(BBB) rev c board using buspirate(BP) and openocd.
I have installed the P2 header in BBB manually. I have connected the BBB and BP as follows

JTAG	BP	BBB
TMS	CS	P2(1) P2 header pin 1
TDI	MOSI	P2(3)
VTREF	VPU	P2(5)
TDO	MISO	P2(7)
TCK	CLK	P2(11)
TRST	AUX	P2(2)
GRND	GND	P2(10)

I am using my user configuration file(BP_userconfig.cfg) for openocd which has following content.

source [find interface/buspirate.cfg]

buspirate_vreg 0
buspirate_mode open-drain
buspirate_pullup 1
reset_config srst_only
buspirate_port /dev/ttyUSB0

source [find board/ti_beaglebone_black.cfg]

Now while running the command sudo openocd -f  BP_userconfig.cfg I am getting following error.

lenova@lenova-ThinkPad-T410:~/jiten/JTAG$ sudo openocd -f BP_userconfig.cfg
Open On-Chip Debugger 0.10.0+dev-00167-g29cfe9c (2017-07-20-14:08)
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.org/doc/doxygen/bugs.html
Warn : Adapter driver 'buspirate' did not declare which transports it allows; assuming legacy JTAG-only
Info : only one transport option; autoselect 'jtag'
srst_only separate srst_gates_jtag srst_open_drain connect_deassert_srst
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain connect_deassert_srst
adapter speed: 1000 kHz
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain connect_deassert_srst
Info : Buspirate Interface ready!
Info : This adapter doesn't support configurable speed
Info : JTAG tap: am335x.jrc tap/device found: 0x2b94402f (mfg: 0x017 (Texas Instruments), part: 0xb944, ver: 0x2)
Info : JTAG tap: am335x.dap enabled
Error: JTAG-DP STICKY ERROR
Error: Could not initialize the APB-AP

Does anyone have any idea about this error? and do i need to do anything else in BBB apart from installing P2 header?
Please let me know if i am doing anything wrong.

Thanks in advance.

Regards
jitendriya

[John Syne]

I haven’t heard of anyone successfully using Openocd on BBB even though I have seen many users try it. I would recommend using Blackhawk USB200 with Code Composer Studio (CCSV7) as it has everything you need to get started. 

Regards,

John

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[Jeff Andich]

There are some TI training videos on building/debugging u-boot/spl via JTAG and Code Composer Studio, which appear to be useful, thus far.  Granted they appear to be a few year's old:

https://training.ti.com/linux-board-porting-series-module-5-installing-code-composer-studio?cu=399066.  

There you can also find the links to the other applicable training modules.