The program time sequence when 52840 poweron.

[oplinux]

Hi guys.

    I wonder the program run start from which section and how to enter the app when 52840 poweron?  Start from SofeDevice?

    I only flashed ble_app_uart and SoftDevice, the program can run normally.

    I flashed three hex: bootloader / ble_app_uart / SoftDevice, the program can also run normally. The twice used a same ble_app_uart.

    Can you tell me the reasons? Thank you.

[Vidar Berg]

Hi,

Address 0x0 is always the entry point after a reset. You can read more about the startup sequence in the Softdevice specification here:

Master boot record and SoftDevice reset procedure

Picture for illustration (the numbers indicate boot order):

[oplinux]

Berg. Thanks for your prompt response.