nrf52833 development board flash memory defect.

Question

Dear Sir or Madam, 
 It´s the second time, I got the same error while start developing with nrf52833 demo board. For first step, I flashed a blinky example to the board - just simple by usb flash memory option. But after a few days, I can´t flash by this option. The device is defect. I can´t use the memory furthermore. The device manager of windows shows en error as shown in attached screenshot. But I think this is no driver problem. 
 
 This is the second board I bought and I don´t know what iI´m doing wrong with it. I can´t explain, why this board is suddenly defect. I didn´t do anything with it. 
 
 Do you have any idea?

Thanks in advance 
 
 Simon

Edvin · Accepted Answer

simon1516 said: I flashed an example before by drag and drop to j link storage. Isn´t that the preferred way to do this? 
 I prefer to use nRF Command Line Tools . The three commands are to flash are: 
 nrfjprog -e (will erase the flash)

nrfjprog --program <hex file> (will program the .hex file. Remember to program the softdevice and the application)

nrfjprog --reset (will reset the DK, and start your application) 
 Or alternatively, you can use the IDE that you use to compile your application to flash it to the DK. 
 
 Drag'n'drop is the last option. As I said, it is possible, but if something goes wrong, you may need to set it back in bootloader mode and upload that file again. One thing that can go wrong is that you accidentally set it in bootloader mode, and then you upload your application to the programmer instead of the nRF52833. 
 
 Best regards, 
 Edvin

nrf52833 development board flash memory defect.

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