topic Re: 0 SWD devices detected issue while flashing in i.MX Processors

0 SWD devices detected issue while flashing

mayureshp — Mon, 31 Jan 2022 12:35:39 GMT

I am getting 0 SWD devices detected error when flashing IMXRT1175 controller using LPC Link-2.

I checked HW connections, which seems ok, i am getting some waveforms on SWDIO, SWDCLK and SWO as well

I am using SDK example "evkmimxrt1170_hello_world_demo_cm7" from 1175 SDK.

I have attached debug log. Do you have any solution for this? is there any other setting needs to be done?

Re: 0 SWD devices detected issue while flashing

mayureshp — Wed, 02 Feb 2022 14:06:07 GMT

I have tried with J Link segger, in Jtag mode. below are the logs i am getting. It says failed to "Failed to power up DAP". Do you have any Idea when this error is flagged?

Re: 0 SWD devices detected issue while flashing

diego_charles — Sun, 06 Feb 2022 05:27:36 GMT

Hi @mayureshp

I hope that you are doing excellent!

Just to get complete background >

Is this the first time that you are attempting to debug your board?
Are you using custom board, correct? Mention this so we can check hardware design guidelines for the MCU.
Did you attempted to previously set any fuse in the MCU?

If you are able to do it: please set the boot option to serial downloader mode , power cycle the board and try to recover the MCU by erasing and flashing your application. Serial downloader halts the application from running.

Many thanks for posting and wait for our reply.

Diego

Re: 0 SWD devices detected issue while flashing

diego_charles — Sun, 06 Feb 2022 05:38:52 GMT

Hi @mayureshp

Regarding your test for JTAG interface

Did you try to set the JTAG_MOD to low? referring to JTAG_MOD section Table 6. JTAG recommendation Of the Hardware Development Guide for the MIMXRT1160/1170 Processor

Diego

Re: 0 SWD devices detected issue while flashing

mayureshp — Sun, 06 Feb 2022 07:51:13 GMT

Hello @diego_charles

Yes JTAG_MOD is LOW. when should i try to Flash and debug the application with Debugger? in Serial Download mode or Internal boot mode?

Re: 0 SWD devices detected issue while flashing

diego_charles — Mon, 07 Feb 2022 02:55:59 GMT

Hi @mayureshp

Thanks for letting me know,

Please try to erase and flash with the board in serial downloader mode. This to have main application halted, or whatever the MCU is expecting to run that it is not the bootloader.

Did you where are able to flash the part in the past?

Cheers,

Diego