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No Cortex-M SW device found (Keil5)

Hello,

I am using Keil-5 and Jlink OB cable to download program to device STM32F407VET.

When downloading the firmware into the device, a error message pops up:

* No Cortex-M SW device found

I have set everything correctly within configure flash tool > Debug > setting such as

* use Jlink / J Trace cortex * SW Port * Max clock (10MHz)

But the error message remains unchanged.

Next I tried to use Jlink Commander to perform some simple tasks on the same device.

* nothing has changed except Keil 5 is now closed and Jlink Commander is on.

Guess what? The commander sees the device upon initialization.

* Found SWD-DP with ID 0x2BA01477

Can someone please explain this difference in behavior?

Thank,
Hock

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