DFU Bootloader does not work on rev 2 nrf51822

[mike]

I have been unable to get an ISP130301 module to work with the example dfu s110 bootloader. Dual band, single bank, all of the sdk and SD variants. I've followed the tutorial.

SD110 + application by itself works fine.

Am I correct in believing that I should discard my rev 2 ISP130301 modules and replace with rev 3 devices?

[Dave_couling]

Did you have this working on a Rev 1 chip? Rev 2 chips do not have any issues with DFU.

[mike]

They may not have issues with DFU, they have issues with me. Perhaps because I am using a buspirate to program memory, and program the UICR register as a separate step.

I've had suggestions to my previous question on my issues, so I guess Nordic dont care.

[Dave_couling]

I cannot comment on using Bus Pirate, but I can able to replicate these steps and successfully program on a J-Link programmer. So likely your issue is with the Bus Pirate.

Always had top notch support from Nordic

[mike]

Ah, I'm just getting frustrated. It's only been a couple of days since I asked. but I have been up till 2am most nights this week in my own time trying to figure it.

[Vidar Berg]

Hi, DFU does work with rev 2, and the only required change I can think of is to change the linker settings(true for the older Development kits with rev 2). SDK v.7 and later are configured for the nRF51 DK kit and dongle which has the xxAC chip variant with 32K of RAM as opposed to 16K with the other variants (overview of chip variants).

The UICR.BOOTLOADDERADDR seems to be set correct as you are able to break in the bootloader. The MBR will not forward the execution to the bootloader unless this is set.

My suggestion would be to try once more with a clean copy of the SDK 8.1 without the Keil packs system. I.e., download the SDK.zip without the _packs postfix at developer.nordicsemi.com/. Then only adjust the RAM settings, and also use the internal RC oscillator in if you do not have an external low frequency clock source on your module (see ble stack init routine). After downloading the softdevice and bootloader, you should see the device advertising as "dfutarg".