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HIzzu
HIzzu
Associate
March 31, 2019
Question

Sometime Cant connect to device using St utility on STM32F767

  • March 31, 2019
  • 2 replies
  • 999 views

I've developed a device with an STM32F767ZIT6 on it. A custom board.

It was always can connect with ST-Link Utils in the beginning but overtime it is very difficult to connect (Cant connect to device) but sometimes it can.

I cant find where the problem comes from, is it power rail problem or what?

Schematics & layout below0690X0000089JVdQAM.png0690X0000089JW1QAM.png

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2 replies

Uwe Bonnes
Uwe Bonnes
Chief
March 31, 2019

This may depend on what is running on the target. E.g. you can't attach to a programm in deep sleep without some mean to wake up the CPU ( Reset, or wait for wakeup.) Tight loops "while (1);" are also hard to attach too.

HIzzu
HIzzuAuthor
Associate
April 1, 2019

The target is empty, no program in it.

but after we erased the flash, it is very difficult to connet.

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