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Error Trying to program nRF51822

Jorge Munoz

Hello,

I have been looking to program this IC, connecting via SWD with no luck. I can connect to the target but for some reason once i try to perform erase programming or read i got an error message with the RAM.

Connecting ...
 - Connecting via USB to J-Link device 0
 - Target interface speed: 2000 kHz (Fixed)
 - VTarget = 3.254V
 - Initializing CPU core (Init sequence) ...
    - Executing Reset (0, 0 ms)
    - Initialized successfully
 - Target interface speed: 2000 kHz (Fixed)
 - Connected successfully
Erasing chip ...
 - Erasing 257 sectors, 2 ranges, 0x0 - 0x3FFFF, 0x10001000 - 0x100013FF
 - ERROR: RAM check failed @ address 0x20000000.
 - ERROR: Write: 0x03020100 07060504
 - ERROR: Read: 0x00000000 00000000
 - ERROR: (0 bytes of RAM have been checked successfully)
 - ERROR: Failed to erase chip
Disconnecting ...
 - Disconnected

I am using a JFlasher portable, is there any known compatibility issue with this IC?

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  • 0

    I think JFlash gives this error if the device is read protected.

    Try connecting then issuing these commands

    w4 4001e504 2
w4 4001e50c 1
w4 4001e514 1

    It should remove read protection and also erase the device (though you many want to erase again just to be sure after issuing those commands

  • 0 in reply to Roger Clark

    Try using the GUI version not the command line and make sure you select the correct template

    Try using the older version of JLink (5.02g) it seems to work

    Strangely, I can't connect if I manually type commands but if I make a script file just containing

    loadbin r q

    and start jlink like this

    jlink -device nRF51822_XXAA -CommanderScript cmdfile.jlink

    it works fine I have windows bat file that creates the bat file, so I can do drag and drop upload of files, I also use the Arduino IDE sometimes to program the nRF51822 and it uploads via a bat file as well

Reply
  • 0 in reply to Roger Clark

    Try using the GUI version not the command line and make sure you select the correct template

    Try using the older version of JLink (5.02g) it seems to work

    Strangely, I can't connect if I manually type commands but if I make a script file just containing

    loadbin r q

    and start jlink like this

    jlink -device nRF51822_XXAA -CommanderScript cmdfile.jlink

    it works fine I have windows bat file that creates the bat file, so I can do drag and drop upload of files, I also use the Arduino IDE sometimes to program the nRF51822 and it uploads via a bat file as well

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