Cannot downloaded firmware to STM32L475VET6 using stlink

[DinoHaw]

Type: Bug Report

Describe the bug

• OS and Version: Windows 11
• VS Code Version: 1.77.3
• Extension Version: v1.0.6
• Target Device: STM32L475VET6
• Keil Studio Pack (10 extension packages)
• Cannot downloaded firmware to STM32L475VET6 using stlink

To Reproduce
Steps to reproduce the behavior:

1. using csolution and "Build"
2. build finished successfully!
3. click “Debug”
4. flash failed and see the following information

The following is terminal information
Device Selected: 066AFF313933554D43221330
Parse debug description...
Create system description...
Connect to debug unit (ST-Link)...
Configure debug unit (SWD @ 10000000 Hz)...
Create device map...
Add Flash Algorithm...
'STM32L4xx 512 KB Flash' (0x08000000 - 0x0807ffff)
Connect ('underReset') to device STM32L475VETx...
Assert hardware reset...
ERROR: General error on memory or register access. (RDDI-ERROR 22)
ERROR: AP register read failed (@0x000000f8)
ERROR: AP register read failed (@0x000000f8)
DSQ ERROR: Debug access failed - target access failed
ERROR: Sequence 'DebugDeviceUnlock' failed
Disconnect from device...
Disconnect from debug unit...
Debug connection failed
Flash failed

[thegecko]

cc @jreineckearm

[jreineckearm]

@DinoHaw , thank you for the report.

Are you running the latest ST-Link FW version?
Are you using a software project that is publicly available?
Does the issue happen on every attempt or has it intermittent character?