Hello Ahamed,
I'm using a J-Link to debug Beagle. I think that it doesn't have a EMU
pin either. Only difference: It has an additional TRST. I would suggest
to just try it.
I think on OpenOCD there are a few options regarding RST. You can have
SRST only, TRST only, both connected together and both as separate pins.
Best regards
Christian
Am 10.05.21 um 06:09 schrieb Ahamed Husni:
Hi all,
I need to debug the Beaglebone Black using JTAG. I got a TI LaunchPad
CC1310. Launchpad has a XDS110 debugger with a (ARM - not sure) 10 pin
JTAG out which can be used to debug external targets. The Beaglebone has
a cTI 20 pin JTAG interface. Pin layouts for the ARM10 and cTI20 is
given here.
http://software-dl.ti.com/ccs/esd/documents/xdsdebugprobes/emu_jtag_connectors.html#connector-information
<http://software-dl.ti.com/ccs/esd/documents/xdsdebugprobes/emu_jtag_connectors.html#connector-information>
Can we map the pins, point to point without adapters to debug the BBB
using Launchpads's XDS110?
Following is what I came up with just refering the above given pin layouts.
*ARM10 to cTI20*
1==5 (VTRef/VCC)
2==1 (SWDIO/TMS)
3==8 (GND)
4==9 (SWCLK/TCLK) SWDCLK(9) and TCK(11) are separate in cTI
5==10 (GND)
6==7 (SWO/TDO)
7 KEYED
8==3 (NC/TDI)
9==12 (GNDDetect)
10==15 (nRESET)
Will this work? (EMU pins are not used here)
Also I found a discussion in TI' forum which says,
"Controlling the EMU0 and EMU1 signals, which are mandatory to place the
AM335x in debug mode."
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/777331/am3358-how-to-evaluate-if-a-jtag-chain-works-correctly
<https://e2e.ti.com/support/processors-group/processors/f/processors-forum/777331/am3358-how-to-evaluate-if-a-jtag-chain-works-correctly>
Also the hardware Mod for libdebugger in RTEMS connects the SWO/TDO(7)
to the EMU0(13).
https://docs.rtems.org/branches/master/user/bsps/bsps-arm.html#debugging-using-libdebugger
<https://docs.rtems.org/branches/master/user/bsps/bsps-arm.html#debugging-using-libdebugger>
My Project Proposal:
https://docs.google.com/document/d/1CN3ri7g6NJeFPb5h8y4smr1aziGWyXbiiXUsFMhdUu4/edit?usp=sharing
<https://docs.google.com/document/d/1CN3ri7g6NJeFPb5h8y4smr1aziGWyXbiiXUsFMhdUu4/edit?usp=sharing>
Best regards,
Husni Faiz.
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