IMX31 boot sequence for J-Tag/J-Link?

justincarrel — Fri, 11 May 2018 15:40:52 GMT

Hello everyone,

I'm trying to set up a Segger J-Link debugger device to debug some memory-related crashes I'm seeing on my IMX31 project, running Nucleus RTOS. I am able to connect to the J-Link successfully but when I try to download or attach to a running program for debugging, I get this output from the J-Link app:

J-Link: Device "IMX31" selected.

J-Link: TotalIRLen = 18, IRPrint = 0x002011

J-Link: At least one of the connected devices is not JTAG compliant (IEEE Std 1149.1, 7.1.1.d, IR-cells). (NumDevices = 4, NumBitsSet = 3)

J-Link: JTAG chain detection found 4 devices:

J-Link: #0 Id: 0x2B900F0F, IRLen: 04, ARM ETB

J-Link: #1 Id: 0x07B3601D, IRLen: 05, ARM1136 Core

J-Link: #2 Id: 0x00000001, IRLen: ?, Unknown device

J-Link: #3 Id: 0x2190101D, IRLen: ?, Unknown device

J-Link: connected to target device

J-Link: Can not read register 15 (R13_USR) while CPU is running

J-Link: Can not read register 9 (R15 (PC)) while CPU is running

J-Link: connection to target device lost.

J-Link: disconnected from target device

I figured that maybe I need to customize the boot sequence and setup the register/memory locations manually. Can anyone possibly tell me the proper sequence with details? Thanks.

Re: IMX31 boot sequence for J-Tag/J-Link?

igorpadykov — Mon, 14 May 2018 10:54:22 GMT

Hi Justin

had you tried with other jtag debuggers, reliable jtag connection can be performed in

bootloader serial mode USB/UART.

Also possible problems are described in arm article:

ARM Information Center

Best regards
igor
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topic IMX31 boot sequence for J-Tag/J-Link? in i.MX Processors

IMX31 boot sequence for J-Tag/J-Link?

Re: IMX31 boot sequence for J-Tag/J-Link?