nrf51822 SD130 dfu bootloader addressing issue

[Meera Shah]

Hey, I am using nrf51822  nRF5_SDK_12.3.0_d7731ad SDK and using Segger embedded studio. In the application code my memory segments is this.  Now I want to do firmware update using DFU. What should I keep my memory segments for proper bootloader working?

[tesc]

Hi,

RAM settings are not affected, as bootloader and application are separate firmware not running concurrently.

Flash: For the nRF51 series, bootloader settings and bootloader are placed at the 21 last kB of flash, i.e. from 0x3AC00. Maximum application flash size then becomes 0x3AC00 - 0x1B000 = 0x1FC00. Please note that it includes application data. See the memory layout section of the bootloader documentation for the details.

Regards,
Terje

[Meera Shah]

Actually I flashed softdevice s130_nrf51_2.0.1_softdevice.hex using nrfgo then I flashed bootloader  (nRF5_SDK_12.3.0_d7731ad\nRF5_SDK_12.3.0_d7731ad\examples\dfu\bootloader_secure) according to https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader this but I didn't get BLE device named dfuTarg. Why this is happening?

[tesc]

Hi,

What option did you choose for how to program the SD and the bootloader (nrfjprog, IDE, nRFGo Studio, etc), what steps did you perform for the programming, and what was the result? Any success messages, error messages, etc?

After programming the flash, both SD and bootloader, can you try resetting the board and see if it enters bootloader mode then?

What is the behavior of the board, does any LEDs blink? Does it advertise using a different name than DFU Targ?

What device and application are you using for scanning, are you using nRF Connect for desktop, or any of the iOS or Android apps (which one)?

Regards,
Terje

[Meera Shah]

I use nrfgo studio for programming. First of all I press button erase all then I flash SD s130_nrf51_2.0.1_softdevice.hex  after flashing softdevice I flashed Bootloader and I can't see BLE advertising in my nRF connect android application . By the way I tried with every combination of reset switch but nothing happens. No LEDs blink on the board. And it doesn't advertise.

[tesc]

Hi,

Have you tried a non-BLE example on the board, such as the Blinky Example, and does that one work as expected?

Have you tried a BLE example on the board, such as the Heart Rate Application, and does that one work as expected?

Those examples are easier to work with, so if they don't work either then they are better for figuring out what is the issue.

Regards,
Terje