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ERROR: Cannot connect to the nRF51 device.

Hi,everyone I have trouble in debugging the "device_firmware_updates" example. Here is my development environment: Keil-MDK :v5.1.0.0 and v5.11.0.0(an other PC). SDK: 4.4.2. S110: 5.2.1. nrfgo studio: 1.17.0. chip: nRF51822 QFAAG00.

when I download code to the chip ,Keil will  generate an error:"ERROR: Cannot connect to the nRF51 device."

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but the nrfgo studio shows the bootloader has been flashed to the memory.

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And i can't debug the project. image description

If anyone know how to fix this, tell me, please!

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0 Petter Myhre over 9 years ago

Please see this question.

Remember to vote if you find the question or the answer helpful.

Edit: You need to do the programming with nrfjprog.exe, then go into debug mode.

Please try the attached project. SDK 4.4.2, SoftDevice S110 5.2.1.

device_firmware_updates_debug.rar
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0 Jin Lu over 9 years ago in reply to Petter Myhre

I did as the answer said .but it doesn't make any change.
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0 Jin Lu over 9 years ago in reply to Petter Myhre

I did as the answer said .but it doesn't make any change.
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