Secure OTA in custom Board

[Nilesh Bhavsar]

Hi,

I had done secure OTA in nRF51 DK board using SDK 12.2.0 and s130 2.0.1 softdevice. Now, i am trying to same thing with my custom Board RL-51822-A1.

For that first i am uploading softdevice s130_nrf51_2.0.1_softdevice. hex file using nrfgo studio then trying to build bootloader using Keil. but my custom board not emit the "DFUTrg".

If same thing i am doing with the nrf51 then its start emitting "DFUTrg".

[bjorn-spockeli]

The RL-51822-A1 does not have the optional 32kHz crystal, so you have to set the low frequency clock source to the internal RC oscillator. This is done by definingNRF_CLOCK_LFCLKSRC as shown below in pca10028.h (or custom_board.h if you've created your own board file)

#define NRF_CLOCK_LFCLKSRC      {.source        = NRF_CLOCK_LF_SRC_RC,            \
                                 .rc_ctiv       = 16,                                \
                                 .rc_temp_ctiv  = 2,                                \
                                 .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_250_PPM

[Nilesh Bhavsar]

I have done this setting but my custom board not emitted "DFUtarg".

Any IROM/IRAM setting require in keil for uploading bootloader in this custom board?

[bjorn-spockeli]

Yes, the RL-51822-A1 uses the QFAA variant(i.e. 16kB RAM) so you will have to adjust the memory settings according to this answer, i.e.

IRAM1 Start: 0x200025E0 Size: 0x1A20

or if you're using gcc and linker scripts

RAM (rwx) :  ORIGIN = 0x200025E0, LENGTH = 0x1A20

[Nilesh Bhavsar]

Thank you for quick response. It's working now.

[bjorn-spockeli]

Happy to help :) I would appreciate if you could mark the answer as correct/accepted by clicking the check mark in the grey circle to the left of the answer.