DFU OTA fails with file > 64KB

[Jerome]

Hello,

I'm trying to upgrade the application on my board via OTA DFU but it seems to fail if the app file is greater than 64KB: DFU fails with my app which is 70kB and works with a basic blinky I wrote which is 16KB

I have a the following setup: nRF52832 SDK 11 SoftDevice s132_nrf52_2.0.0 Bootloader nrf52832_xxaa_s132 (i assume it's the dual bank) Compiler gcc-arm-none-eabi-4.9.3.2015q3 nrfutil (to generate the DFU zip file) 0.5.2 nrf tools iOS app to run the DFU OTA

I did a memory dump of the nrf52832 flash and can see that I have: the SD from 0x00 to about 0x01B6B4 my running App from 0x1c000 to 0x2d06c the app binary image which was transfered by the DFU from 0x4B000 but cut short and ending at 0x5B003 (about 64K but not exactly????) and the BL from 0x7A000 to 0x80000

Any idea what could be going wrong?

thanks

Jay

[bjorn-spockeli]

If the bootloader is dual bank then the maximum application size is BOOTLOADER_REGION_START -APP_CODE_BASE/2 which for the S132 v2.0.0 is )0x7A000-0x1C000)/2 = 0x2F000 = 188kB.

Does the nRF Toolbox app display any error message during the DFU process? Could you share the bootloader project and the application image you're trying to update?

[Jerome]

Hi Bjorn,

Yes, the iOS app displays "DFU CRC Error" just after the transfer bar reaches 100%

Yes I can share the bootloader(both code and/or hex file) and the app zip package: Excuse the silly question, what's the best way to share this?

[bjorn-spockeli]

Hi Jerome, I apologize for my late reply. You can share them as attachments in the question. Just zip the bootloader project folder.