DFU bootloader

[FormerMember]

HELLO everyone, i know we can download application by dfu, can we download bootloader and softdevice by dfu??

if you know, please tell me, thank you

[Ole Bauck]

Hi,

Yes you can. As the documentation for the BLE secure DFU bootloader example says:

The example bootloader accepts images that contain a new bootloader, SoftDevice, application, or any combination of these.

Ole

[Ole Bauck]

The QFAA version has 16KB of RAM. The ANCS application in SDK 12.2 sets the start address of the application RAM to 0x20003440, which means that you have 0xBC0 = 3008KB left to the application. The application uses over 8KB of RAM (see here for figuring out how much RAM and ROM the application uses). To sum up you need the QFAC version of the chip with 32KB of RAM.

Also if you are working on the 16KB version you should set the size of the RAM such that the start + size ends at 0x20004000 (0x4000 = 16KB), then you will get an error when you compile if the RAM is too small.