I can run sample blinky in debug mode， but can not work in flash mode.

[[email protected]]

Environment:

sdk: NCS 2.7.0,

tool: vscode nrf connect 

board: my self board (same with official hardware reference: nRF52832-CIAA Reference Layout 1_0, nrf52832_ciaa_2-layer.PrjPCB ), just a mini system with only chip nrf52832, without dc-dc.

config: official nrf52dk/nrf52832, no overlay file, system build 

Bug description: I create a my self project from vscode nrf connect with copy the blinky sample mode. The project can work in debug mode. I can control the led blink. But do not work in flash mode.

Question:

1: what's kind of reason could be? such as the bootloader or soft device firmware do not programming into flash. or programming into flash space incorrect? Or other reason cause to..

2: How can i confirm that  whether it is bootloader or soft device issue? 

3:  I do not understand the composition  of build output file (zephyr.efl)， whether just programming this one file to flash is enough in any case (for nrf52832 single core chip)?

     zephyr.elf = soft device + bootloader + application (blinky) ?   

     is soft device option, just for BLE case ?

     is bootloader  necessary for any case ?

     could only program application to someone flash address, can work ? i guess if only programming application (for blinky) to some RAM address is ok.

     where can i got the bootloader and soft device files?

     a, These file will generate each time i build the blinky project?

     b, bootloader build from the MCUBOOT project?

     c, how to get the soft device files adapt to my board and chip in NCS +  vscode nrf connect environment? 

[Vidar Berg]

Hello,

The nrf52dk/nrf52832 target enables the DCDC regulator and selects the 32KHz crystal oscillator as the low frequency clock source by default. If your board design doesn't include the optional DCDC inductors or 32KHz crystal, you can override these defaults in your project configuration, or define your own board. 

Please try to add these configurations to your prj.conf file:

# Select internal RC oscillator as 32KHz clock source
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
# Disable DCDC regulator
CONFIG_BOARD_ENABLE_DCDC=n

Best regards,

Vidar

 

[[email protected]]

Cool， The Led is blinking. Thank you very much!!! Because my board without DCDC.

By the way, could you answer me the question 3 ? i am very confuse about it.