How to change mesh bootloader flash size?

[Tomlee]

Hi

When I build mesh bootloader code, there shows flash size not enough,  

Could you tell me wher I can change the size, please?

c:/progra~2/gnutoo~1/62017-~1/bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/bin/ld.exe: mesh\bootloader\mesh_bootloader_serial_gccarmemb_nrf52833_xxAA.elf section `.text' will not fit in region `FLASH'
c:/progra~2/gnutoo~1/62017-~1/bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/bin/ld.exe: region FLASH overflowed with .data and user data
c:/progra~2/gnutoo~1/62017-~1/bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/bin/ld.exe: region `FLASH' overflowed by 11300 bytes

[Edvin]

Hello,

How did you attempt to build the bootloader?

Do you need to do any changes? Or what is the reason you can't use the provided bootloader?

Best regards,

Edvin

[Tomlee]

I need mesh dfu feature and communication with usb of nRF52833 D- and D+

Do you have any examples ?

[Edvin]

Do you need the USB communication inside the bootloader, or can that be part of your application? 

The bootloader should only be responsible for the swap of the old and new application images. At 99.9% of the time, it would be the application that is running, and that is where you have all your normal functionalities (button handling, using peripherals and so on).

BR,

Edvin

[Tomlee]

So , do you mean that  USB communication receiving data from pc is only happend in application part when dfu is running?

bootloader part is only responsible for the swap of the old and new application images, right?

but there are two hex files mesh_bootloader_gccarmemb_nrf52833_xxAA.hex and mesh_bootloader_serial_gccarmemb_nrf52833_xxAA.hex,    what does mesh_bootloader_serial_gccarmemb_nrf52833_xxAA.hex use for?

In SDK ,  examples\dfu\dfu_nrf52833_xxAA_s113_7_2_0.emProject,   in this example, if I want to receive fw data from pc side then mesh dfu, which bootloader hex file need to be programed to ev board?

[Edvin]

Yes. All other parts that are running on the board is running from the application. Peripherals, Buttons, LEDs, mesh communication, logging over USB/UART, sensors connected via UART/SPI/I2C, LEDs controlled by PWM, and so on. This is also where you would typically put the USB parts that the application will run.

BR,
Edvin