Problems flashing the DFU on the Eval Kit

[Locky]

I am using the GCC DFU project provided by Nordic on GitHub (devzone.nordicsemi.com/.../)

I altered the main.c to trigger to DFU mode based on the contents of the GPREGRET register rather than Button 7. However when I try and Flash the .hex file (bootloader_gcc_xxaa.hex) of the project on nRFgo Studio I get the follow error. The hex file has data in SoftDevice region. Try programming using "Program SoftDevice", or erase all before programming.

Can I (,how can i) alter this project to not reside in the SoftDevice region or do I have to fully integrate it with the SoftDevice (7.0.0) .hex?

Thank you for your help.

P.S. I am using rRFgo Studio 1.17.1 to flash

nrf51_bootloader_gcc-master.zip

[Nguyen Hoan Hoang]

Ok, I have a good hex here that was compiled with gcc. Try to flash it see if it's ok. Your version may have a compilation issue. dfu_nrf51.hex

[Locky]

Thanks for the reply Nguyen, your .hex file does flash successfully. So there is an issue with my project. I suspect it could reside in either my gcc linker file or the nrf51 common linker file that it refers to.

[Nguyen Hoan Hoang]

You may try my DFU GCC project at embeddedsoftdev.blogspot.ca/.../ehal-nrf51.html

[Locky]

Thanks Nguyen, I am going through your linker files to find any deviations.

[Nguyen Hoan Hoang]

I don't think it's in the ld script. I suspect something in the code. Could you try to find all the attribute stuff see if anything out the ordinary. You may have set something thing to be located in the softdevice memory area.

[Locky]

I am suspecting the same as you. My bootloader_util_gcc.c has the attributes matching the linker file:

uint8_t m_boot_settings[CODE_PAGE_SIZE] attribute((section (".bootloader_settings_sect"))) attribute((used));

uint32_t m_uicr_bootloader_start_address attribute((section (".NRF_UICR_BOOT_START_SECT"))) = BOOTLOADER_REGION_START;

in dfu_types.h

#define BOOTLOADER_REGION_START         0x0003C000