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Cann't connect iMX8QXP-CM4  again after flash M4 image in an undefined address using J-LINK

Question asked by meng zhu on Dec 21, 2018
Latest reply on Jan 7, 2019 by meng zhu

hi, all

I flash iMX8QXP-CM4 image in an error address using JLINK-flash.exe.when i connect JLINK using JTAG again,it cann't connect.

 

Device "MIMX8QX6_M4" selected.


Connecting to target via JTAG
***************************************************
J-Link script: iMX8QX Cortex-M4 core0 J-Link script
***************************************************
TotalIRLen = 4, IRPrint = 0x01
JTAG chain detection found 1 devices:
#0 Id: 0x5BA00477, IRLen: 04, CoreSight JTAG-DP
AP map detection skipped. User manually configured AP map.
AP[0]: AHB-AP (IDR: Not set)
AP[1]: AHB-AP (IDR: Not set)
AP[2]: AHB-AP (IDR: Not set)
AP[3]: AHB-AP (IDR: Not set)
AP[4]: APB-AP (IDR: Not set)
AP[2]: Skipped. Could not read AHB ROM register
AP map detection skipped. User manually configured AP map.
AP[0]: AHB-AP (IDR: Not set)
AP[1]: AHB-AP (IDR: Not set)
AP[2]: AHB-AP (IDR: Not set)
AP[3]: AHB-AP (IDR: Not set)
AP[4]: APB-AP (IDR: Not set)
AP[2]: Skipped. No ROM table (AHB-AP ROM base: 0x00000000)
***************************************************
J-Link script: iMX8QX Cortex-M4 core0 J-Link script
***************************************************
***************************************************
J-Link script: iMX8QX Cortex-M4 core0 J-Link script
***************************************************

****** Error: Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Command : 10) @ Off 0x5.
Could not find core in Coresight setup
***************************************************
J-Link script: iMX8QX Cortex-M4 core0 J-Link script
***************************************************
***************************************************
J-Link script: iMX8QX Cortex-M4 core0 J-Link script
***************************************************
Cannot connect to target.

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