Jlink debug issue

[shmm91]

Can't connect device using jlink, the nrst/swdio/sclk/gnd gpio is connected, but can't connected with jlink j-flash. The prompt:
Connecting ...

• Connecting via USB to probe/ programmer device 0
• Probe/ Programmer firmware: J-Link V9 compiled May 7 2021 16:26:12
• Probe/ Programmer S/N: 59300616
• Device "STM32H743VI" selected.
• Target interface speed: 20 kHz (Fixed)
• VTarget = 3.290V
• ConfigTargetSettings() start
• ConfigTargetSettings() end - Took 21us
• InitTarget() start
• SWD selected. Executing JTAG -> SWD switching sequence.
• DAP initialized successfully.
• InitTarget() end - Took 348ms
• Found SW-DP with ID 0x6BA02477
• DPIDR: 0x6BA02477
• CoreSight SoC-400 or earlier
• Scanning AP map to find all available APs
• AP[3]: Stopped AP scan as end of AP map has been reached
• AP[0]: AHB-AP (IDR: 0x84770001)
• AP[1]: AHB-AP (IDR: 0x84770001)
• AP[2]: APB-AP (IDR: 0x54770002)
• Iterating through AP map to find AHB-AP to use
• AP[0]: Core found
• AP[0]: AHB-AP ROM base: 0xE00FE000
• CPUID register: 0x411FC271. Implementer code: 0x41 (ARM)
• Cache: L1 I/D-cache present
• Found Cortex-M7 r1p1, Little endian.
• FPUnit: 8 code (BP) slots and 0 literal slots
• CoreSight components:
• ROMTbl[0] @ E00FE000
• [0][0]: E00FF000 CID B105100D PID 000BB4C7 ROM Table
• ROMTbl[1] @ E00FF000
• [1][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7
• [1][1]: E0001000 CID B105E00D PID 000BB002 DWT
• [1][2]: E0002000 CID B105E00D PID 000BB00E FPB-M7
• [1][3]: E0000000 CID B105E00D PID 000BB001 ITM
• [0][1]: E0041000 CID B105900D PID 001BB975 ETM-M7
• [0][2]: E0043000 CID B105900D PID 004BB906 CTI
• I-Cache L1: 16 KB, 256 Sets, 32 Bytes/Line, 2-Way
• D-Cache L1: 16 KB, 128 Sets, 32 Bytes/Line, 4-Way
• Executing init sequence ...
• CPU could not be halted
• OnDisconnectTarget() start
• OnDisconnectTarget() end - Took 264ms
• ERROR: Failed to connect.
  Could not perform custom init sequence.
• ERROR: Connect failed
  Do you have any ideas?

[Peize-Liu]

I only tested DFU mode. It seems to be the problem with JLINK. Can you provide more information about your debugger and connections? Like JLINK, via OpenOCD, or something else? I might have some idea after that.

[shmm91]

I use j-link debugger with swd interface, the j-link software version is JLink_V794b, the j-link hardware version is J-Link V9。

[shmm91]

more info picture