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Could not stop cortex-M device. Please check the JTAG cable

crlf crlf

Hi everyone,
Yesterday I upload code on my board(STM32F303k8T6) one time.I use STlink V2 mini SWD programmer(SWDCLK,SWDIO,3.3v, gnd) After I try to upload new code in uc but keil say "device not found" but its connected. After I think keil try to erase code in flash so its get error.I connect nrst pin with rst pin in STlink V2 mini. After keil send error "Could not stop cortex-M device. Please check the JTAG cable". Can someone help me?
Thanks.

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  • 0 in reply to Andy Neil

    Hi,
    Andrew Neil thanks for your answer.
    I only upload blink example in stm32f303.Its work and led begin blink. After I want to change blink delay.I change in keil and debug and click upload. But it did not show target. After I connect NRST pin to reset pin. After this error occur.

    I did not change any configuration. I did not change any security configuration.

    Thanks a lot.

Reply
  • 0 in reply to Andy Neil

    Hi,
    Andrew Neil thanks for your answer.
    I only upload blink example in stm32f303.Its work and led begin blink. After I want to change blink delay.I change in keil and debug and click upload. But it did not show target. After I connect NRST pin to reset pin. After this error occur.

    I did not change any configuration. I did not change any security configuration.

    Thanks a lot.

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