Can`t run bootloader_secure on customer board

Question

Hi I am using SDK12.2.0 and Softdevice S130 v2.0.1 on board PCA100028 ; the board works fine and Phone can scan the name of DFUtarg； But when run the same on the customer board, it seems didn't work because I didn't scanned the DFUtarg; so did any special requirement setting for customer board? 
 Can anyone help me resolve this question? Thanks!

bjorn-spockeli · Accepted Answer

Does your custom board have the optional 32kHz crystal ? If not, then you have to set the low frequency clock source to the internal RC oscillator. This is done by defining NRF_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}