NRF51 DK: Failed to connect to target, no Idcode detected

RE: NRF51 DK: Failed to connect to target, no Idcode detected

Sigurd — Mon, 02 Dec 2019 19:40:18 GMT

[quote user="thoric_fish"]We tried doing the erase and recover commands through nrfjprog as you suggested before, but these error messages still appear.[/quote]

What did nrfjprog -f NRF51 --recover return ?

Have you measured the supply voltage on the kit? It should be somewhere between 2.8V-3.3V.

Have you tried to press the IF BOOT/RESET button while power cycling the kit? It should then show up as a Removable Storage Device named "BOOTLOADER". Then you can drag-and-drop the J-LINK interface MCU firmware found here(v170724) onto the storage device to reprogram the JLINK firmware.

Could you upload the log that is generated, when you run

nrfjprog -f NRF51 --recover --log

RE: NRF51 DK: Failed to connect to target, no Idcode detected

thoric_fish — Mon, 02 Dec 2019 03:58:21 GMT

Hi we thought this solved the issue, but today when we tried flashing the uart example from the peripheral examples of SDK v12.1, we got the following error message in Keil.

We also tried flashing the sample example through nrfconnect but got this error message:

We tried doing the erase and recover commands through nrfjprog as you suggested before, but these error messages still appear. We searched through other Devzone posts where other users had similar "Flash Download failed - "Cortex-M0" " issues due to not having the correct SoftDevice on their boards. But the UART peripheral example we are flashing should not be using SoftDevice.

Do you have any suggestions? Thank you

RE: NRF51 DK: Failed to connect to target, no Idcode detected

Sigurd — Tue, 26 Nov 2019 16:16:20 GMT

Try this:

nrfjprog -f NRF51 -e
nrfjprog -f NRF51 --program softdevice.hex --verify
nrfjprog -f NRF51 --program application.hex --sectorerase --verify

If nrfjprog -f NRF51 --e fails, then try this instead:

nrfjprog -f NRF51 --recover

RE: NRF51 DK: Failed to connect to target, no Idcode detected

thoric_fish — Tue, 26 Nov 2019 15:49:01 GMT

When we check the DK board we see that SB9 has never been cut, there's a short across P22.

We also tried to do nrfjprog -f NRF51 --program application.hex --verify. But here is the error message that was returned.

Do you have any suggestions? Thank you.

RE: NRF51 DK: Failed to connect to target, no Idcode detected

Sigurd — Mon, 25 Nov 2019 15:36:45 GMT

Hi,

Have you done any current measurements on the DK recently ? If yes, make sure that you short / set a jumper on P22.

Could you add --verify to the nrfjprog program command, i.e.

nrfjprog -f NRF51 --program application.hex --verify

Do you then get "Verified OK." returned ?

Could you try to install the latest nRF-Command-Line-Tools ? Note that "SEGGER J-Link software and documentation pack" is included in the Windows installer.