nFR51822 DFU-OTA bootloader do NOT work

[wins]

I use SD 7.1.0. My own app works perfectly. I use my own PCB, debugger J-Link Segger. I try to upload any app via bootloader from SDK's example (modified in LED_pins dfu_dual_bank_ble_s110_pca10028). Dfu adv-nt doesn't start.

dfu_init() == NRF_SUCCESS;

but go to infinite loop in

dfu_ble_get_peer_data(&m_ble_peer_data)  == NRF_ERROR_INVALID_DATA
  ->  crc16_compute((uint8_t *)&m_peer_data, sizeof(m_peer_data), NULL); <- here

It is example and I am a newbie. What I do wrong?

edit 1 check blog post devzone.nordicsemi.com/.../

[Hung Bui]

@wins&kooklaus: crc16_compute() should not cause an infinite loop. I guess you are seeing that because it's a long loop that take forever if you just stepping by pressing F11. You can try to add a breakpoint after the call.

What exactly happens when you program the stock example in the SDK v7.2 ? Do you see the device advertise as "DFUTarg" ?