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Problem debugging on iMX.RT1052 using LPC-Link2

Question asked by Ed Waldner on Aug 23, 2018
Latest reply on Aug 24, 2018 by Ed Waldner

I have an SDK demo project that programs on an iMX.RT1052 target when using a MIMXRT1050-EVK as a debug probe. I am able to then debug using MCUXpresso IDE v10.2.1 as well as run thru the GUI flash tool embedded within MCUXpresso IDE to mass erase the quadspi flash attached to the device. 


I am trying to get to the same point using an LPC-Link2 instead of the MIMXRT1050-EVK. I downloaded LPCScrypt and programmed what I believe is the latest firmware on the probe:


Booting LPCScrypt target with "LPCScrypt_218.bin.hdr"

LPCScrypt target booted


Programming LPC-Link2 with "LPC432x_CMSIS_DAP_V5_183.bin.hdr"


- LPC-Link2 programmed successfully and has the unique ID: I3FUBTOQ

- To use: make link JP1 (nearest USB) and reboot.


When I attach the probe to my target and attempt to enter debug mode, however, I get the following wire ACK fault:


MCUXpresso IDE RedlinkMulti Driver v10.2 (Jul 25 2018 11:25:37 - crt_emu_cm_redlink build 555)

Found chip XML file in C:/Users/Edw/Documents/Holodeck/VboxShared/f8-sandbox/staging_wdm-ucmrt_core_testbed/playground/uCM-RT-TB_flexspi_nor_polling_transfer/Debug\MIMXRT1052xxxxB.xml

Reconnected to existing link server

Connecting to probe 1 core 0:0 (using server started externally) gave 'OK'

Probe Firmware: LPC-LINK2 CMSIS-DAP V5.183 (NXP Semiconductors)

Serial Number:  I3FUBTOQ

VID:PID:  1FC9:0090

USB Path: \\?\hid#vid_1fc9&pid_0090&mi_00#11&2b2fe572&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}

Using memory from core 0:0 after searching for a good core

debug interface type      = Cortex-M7 (DAP DP ID 0BD11477) over SWD TAP 0

processor type            = Cortex-M7 (CPU ID 00000C27) on DAP AP 0

number of h/w breakpoints = 8

number of flash patches   = 0

number of h/w watchpoints = 4

Probe(0): Connected&Reset. DpID: 0BD11477. CpuID: 00000C27. Info: <None>

Debug protocol: SWD. RTCK: Disabled. Vector catch: Disabled.

Content of CoreSight Debug ROM(s):

RBASE E00FD000: CID B105100D PID 000008E88C ROM dev (type 0x1)

ROM 1 E00FE000: CID B105100D PID 04000BB4C8 ROM dev (type 0x1)

ROM 2 E00FF000: CID B105100D PID 04000BB4C7 ROM dev (type 0x1)

ROM 3 E000E000: CID B105E00D PID 04000BB00C ChipIP dev SCS (type 0x0)

ROM 3 E0001000: CID B105E00D PID 04000BB002 ChipIP dev DWT (type 0x0)

ROM 3 E0002000: CID B105E00D PID 04000BB00E ChipIP dev (type 0x0)

ROM 3 E0000000: CID B105E00D PID 04000BB001 ChipIP dev ITM (type 0x0)

ROM 2 E0041000: CID B105900D PID 04001BB975 ARCH 23B:4A13r0 CoreSight dev type 0x13 Trace Source - core

ROM 2 E0042000: CID B105900D PID 04004BB906 CoreSight dev type 0x14 Debug Control - Trigger, e.g. ECT

ROM 1 E0040000: CID B105900D PID 04000BB9A9 CoreSight dev type 0x11 Trace Sink - TPIU

ROM 1 E0043000: CID B105F00D PID 04001BB101 System dev (type 0x0)

Non-standard DAP stride detected - 1024 bytes

NXP: MIMXRT1052xxxxB

Connected: was_reset=true. was_stopped=false

Awaiting telnet connection to port 3330 ...

GDB nonstop mode enabled

After error Nn(05). Wire ACK Fault in DAP access -

Failed to read address register in DAP - Nn(05). Wire ACK Fault in DAP access

Target error from Write Memory: Em(17). Debug port inaccessible after access at location 0x20000800

GDB stub (crt_emu_cm_redlink) terminating - GDB protocol problem: Pipe has been closed by GDB.

error closing down debug session - Nn(05). Wire ACK Fault in DAP access


I tried this with JP1 on my LPC-Link2 both open and closed. My target is self powered so I have JP2 open.


Would appreciate any advice on how to get past this issue.