i want to update (dfu)from sdcard .

[syc776]

update from sdcard ,read sdcard file and to update  ,have the example ? if no  ,can you tell me how to do it?

[Hung Bui]

Hi, 

We currently don't have an example on that particular feature. I assume it's a single chip setup ? You want the bootloader to read the SDcard and update the application firmware on the same chip ? We only have example for 2 chip solution where the image sent from one chip/PC to the nRF52. You would need to write your own code to read the SD card and store the image to flash. You can reuse some part of the bootloader, for example flash storing, init packet checking, image swapping. 

[syc776]

thanks for answer .

the image is bin file?

init packet checking how to do it?

can you help me?

[Hung Bui]

Please get familiar with our bootloader and DFU process. It may be useful for your project. 

I have a small blog post here that you can follow: https://devzone.nordicsemi.com/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader#_cptype=root

[syc776]

above example from sdk15 ,can use hex/bin file to update firmware?

[Hung Bui]

Please follow the documentation on infocenter

[syc776]

i want to modify the bootloader ?  i want to know

how to modify?