Recover the MBR

[mamrezo]

hello i have nRF51822 QFAAH1 and accidentally erased the chip and also MBR section with jlink, what should i do for bring MBR back.

[bjorn-spockeli]

Hi Mamrezo,

the MBR is a part of ourSoftDevices, see this page on Infocenter, thus you just have to flash the SoftDevice to your nRF51822.

Best regards

Bjørn

[mamrezo]

thanks for you reply, first time i flashed SD to my chip and uploaded my program, it worked, but when accidentally erased all the chip and reflashed the SD, the program didn't work.

[bjorn-spockeli]

Are you sure that the SoftDevice you flashed to the nRF51822 is compatible with the application program? Which SDK version is the application built in and which SoftDevice version are you using?

[mamrezo]

in this time i am using Arduino and SD s130_nrf51_1.0.0_softdevice.hex my chip part no. is (N51822 QFAAH1 1621DR)

[bjorn-spockeli]

If the application you're building in the Arduino IDE is compiled against the headers of the S132 v1.0.0, then you should not have any issues. Please verify that the application is compile with the correct headers.

[mamrezo]

you are right, but why first time it worked but when i erased all the chip didn't work? when i upload the program at 0x00000000 instead of 0x0001C000, it works (without using SD)