Update Application with SPI flash

[Taylor]

Hi,

I have used DFU to update my application and worked normally. Now I need to update the application which has be written in NOR flash.

Firstly, I will write the application file in NOR flash in old application. The size of application is over 40k, so I need to jump to bootloader.

How can I jump to bootloader in application and what should I do in bootloader next?

Thanks!

SDK 17.02 

nRF52810 

secure_bootloader_s112

[Jørgen Holmefjord]

Hi,

How can I jump to bootloader in application

We do not provide any examples of jumping from application to bootloader, the SDK examples uses one of the supported DFU enter metods, and reset the chip. On boot, the bootloader will always run first and only jump to the application if the DFU enter methods are not set.

what should I do in bootloader next?

The bootloader does not support storing application updates in external flash. You will have to rewrite the bootloader to store the received update chunks in the SPI flash and copy it back to internal flash from the external flash once the entire image is received and verified.

Best regards,
Jørgen

[Taylor]

Hi Jørgen Holmefjord,

I'll download application to external flash and then reset my system in order to into bootloader. And I will replace application with external flash codes next. So I want to know how to "eplace application with external flash codes" in bootloader.