RE: nRF51dk -> problem with programming external nrf51822 board (from china)

Klemen — Thu, 18 Feb 2016 16:13:57 GMT

Chip markings: N51822 QFAAH0 1524FY

I tried the upper method on the chinese and a new chip.. The new chip worked normal, the chinese returned error -> No device detected (int the pictures)

I also checked JLinkARM.dll installation path (in register) and in it is on the correct path

recover.png Studio.png StudioNewSuccess.png

EDIT: Solved.. I had to plug-in and out the nrf51DK board from the USB port (several times..).. also had to change the usb post.. ?? Now 80% of the time it works, 20% not works.. ?

RE: nRF51dk -> problem with programming external nrf51822 board (from china)

Einar Thorsrud — Tue, 16 Feb 2016 09:58:20 GMT

If the chip is locked, you can use nrfjprog --recover to erase the flash and disable protection. The only difference between nrf51822 and nrf51422 is that only nrf51422 support ANT, so this is not related.

If it does not help it would be interesting if you could provide details on how it fails when you try to program the chip, and the markings on the chip in order to know which variant it is.