XDS110 from MSP432P401R Launchpad for CC26xx/CC13xx

OK, it is possible but not straight forward. Two additional wires solved the problem:

One other option would be to use www.ti.com/.../CC-DEVPACK-DEBUG.

Thanks for confirming that this is possible! Can you give some more detail on where those extra wires go? It's not too clear from the picture.

EDIT: I see that TDI is accessible from the JTAG switch (S101) solder pads on the underside of the board. TDO seems like it's a lot harder to get at.

Hi,

I got TDI from S101 pin 6 "XDSET_TDI". It's not a problem as pin is available for connection.

I got TDO from "XDSET_TDO_SWO" pin 12 IC111. The best way to access the line was to open mask on the trace not far from IC111. Be careful not to hurt another lines. Fix the wire by drop of glue.

Hi,

This is verified working. Tried on Energia and CCS, can burn the  standalone chip.

Tried with the sketch "Fade" from examples inside Energia.

Thanks for sharing this idea.

Leo

Hello TER,
Is it ok if I dont connect TDI and TDO pins??

Hi Nafeesa,

I never tried yet but from what I think, You cannot use the JTAG Debugger but can program the standalone IC.

I'll get back to you after trying to remove the TDI and TDO and program the IC.

Leo

Hello Leo,
I tried connecting without TDI and TDO pins. The target is connecting and I am able to debug the program:)

Hi Nafeesa,

Good to hear that it is working even if you tried to run debug mode and program an external target MCU.

I was not able to try that. So what is the importance of these pins (TDI, TDO)?

Best Regards,

Leo 

Hi,
I think You don't need to desolder these wires. It should not influence on MSP432P401R programming. Just keeps attached wires reasonable short.

Hi oleg,, Are u sure..??
But if you go thru MSP432P401R launch pad, the pins to be soldered (i.e pin 6 of S101 and Pin 12 of IC111) are very small. And i am not getting sufficient area to solder, if i solder there can be possible that the board may get damage because of small pin size and very less space availabe on Launch pad..
Can you suggest me other possible solution..
Thanks for your time

Hi, I do not know another way to use MSP432P401R launch pad as programmer for CC26xx.

Now the CC2650 launchpad is out (www.ti.com/.../launchpads-connected-launchxl-cc2650.html, this has a 10 pin jtag connector that can be used to debug external targets.

Hi Mr. Rohit,

It is not necessary to directly solder pin12 of IC111. I stripped of the PCB enamel to expose the trace going to that pin of IC111.

From there, I can now solder more safely and attach a piece of smallest jumper wire that I can find to my 7pin 1.27mm header JTAG connector.

Care must be taken to solder the point going to pin12 of IC111. The TX/RX pin, i did not connect to my 7pin header.

Good day,

Leo

Nafeesa Muntashar57 said:

Hello Leo,
I tried connecting without TDI and TDO pins. The target is connecting and I am able to debug the program:)

I just tried this and it works with the latest XDS110 firmware. TI have updated the firmware to support cJTAG, which makes it possible to program a CC26xx target without needing TDI and TDO connections. See this thread for further details: https://e2e.ti.com/support/wireless_connectivity/bluetooth_low_energy/f/538/p/410451/1721479#1721479

This is great news because it means we no longer need to make the difficult connections to TDI and TDO. The cable can now be wired up with just five connections to J103 (GND, RST, SWCLK, SWDIO and 3V3).

Thanks!!!! I do the connections you show and works fine with cc1310!!!