Bootloader IRAM

[BillyHu]

I want to change bootloader start address BOOTLOADER_REGION_START to 0x33800 to store user data and DFU. But when I only change BOOTLOADER_REGION_START, my device can't work correctly, I can't scan my nrf51822 via toolbox now.What should I do else to achieve it？

My IC is nRF51822 QFAAH0.

[Nick Pelis]

You also need to relocate the start address of the bootloader to 0x33800 so the linker knows to place code there. In Keil, this is part of the project properties, as the start value for the IROM1 region.

[BillyHu]

Then how to setup IRAM1 or IROM1 ?

[Nick Pelis]

Check out the example project in the SDK, under examples/bootloader/dfu.

[BillyHu]

Thanks Nick. Now I can do DFU via nRF Toolbox. But I can't do it with Master Control Panel app. I can discover the device and connect it. but when i choose DFU and select the needed update firmware, the MCP app will disconnect from the device, My MCP app version 2.0. Could you please tell me how to do DFU with MCP ?

[Hung Bui]

@BillyHu: You may want to update the MCP app. The current version is v3.4.1