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error: flash download failed - cortex-m4

Hi there

I'm new at Keil and ARM. I tried a lot to ran a project (blink) to just test if my STM32F4 Discovery is working or not but there is a Error "error: flash download failed - cortex-m4" and I searched some in internet but I couldnt fix it. I will be thankful if you guys help me.

Masoud

Parents
  • if you mean "Connect Under Reset" as an option in ST-LINK Utilities, I can't connect my board to to that program right now either in "Normal" mode or "Connect Under Reset" mode or "Hot Plug" mode. Error shows for all of the modes is "Can not read memory! Disable read Out Protection and retry."

    I also looked for disabling read out protection but don't understand anything.
    Help me please.

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  • if you mean "Connect Under Reset" as an option in ST-LINK Utilities, I can't connect my board to to that program right now either in "Normal" mode or "Connect Under Reset" mode or "Hot Plug" mode. Error shows for all of the modes is "Can not read memory! Disable read Out Protection and retry."

    I also looked for disabling read out protection but don't understand anything.
    Help me please.

Children