topic Re: Access a Custom RT1170 Board over JTAG/SWD in i.MX RT Crossover MCUs

Access a Custom RT1170 Board over JTAG/SWD

abady1000 — Tue, 18 Mar 2025 13:23:11 GMT

Hello,

I am using a custom board based on RT1176,

After powering the board up I was able to access serial interface (UART) and I was able to communicate with the chip, read and write data to internal RAM.

The problem is that I can't access SWD interface using MCU-Link-Pro, when I connect MCU-Link-Pro I receive error that states nothing is detected on the bus!

I checked the connection it is corerct (SWDIO, SWDCLK, GND), when I start the debugging process the debugger send the sequence to change from JTAG to SWD correctly, what could be the issue?

Re: Access a Custom RT1170 Board over JTAG/SWD

abady1000 — Wed, 19 Mar 2025 06:06:28 GMT

Here is exactly the message I get

Re: Access a Custom RT1170 Board over JTAG/SWD

Gavin_Jia — Fri, 21 Mar 2025 07:46:29 GMT

Hi @abady1000 ,

Thanks for your interest in NXP MIMXRT series!

Can you have a try with this operation? It will erase your flash in SDP mode.

It seems that this user is experiencing the same issue as you.

Re: Access a Custom RT1170 Board over JTAG/SWD

abady1000 — Sun, 23 Mar 2025 08:04:06 GMT

Thank you, this work for me.

Is there an explanation for why this happen! Even though it is brand new chip!

Re: Access a Custom RT1170 Board over JTAG/SWD

Gavin_Jia — Mon, 24 Mar 2025 03:29:01 GMT

Hi @abady1000 ,

Generally this issue occurs due to an error in the code running in flash. Completely brand new boards and flash should be less likely to have problems, but anyway congratulations on solving the problem and you can start enjoying the development journey!

Best regards,
Gavin