Combining BLE NUS and Buttonless DFU

RE: Combining BLE NUS and Buttonless DFU

Shiv — Tue, 11 Jun 2019 15:47:36 GMT

That is a very useful tutorial. Thank you so much.

RE: Combining BLE NUS and Buttonless DFU

Einar Thorsrud — Tue, 11 Jun 2019 13:01:27 GMT

Hi,

The reason for changing the RAM start address is if you modify the SoftDevice configuration so that the SoftDevice needs more RAM. The RAM is split so that the SoftDevice uses the lower parts of the RAM, and the application the highest. See Adjustment of RAM and Flash memory for details.

RE: Combining BLE NUS and Buttonless DFU

Shiv — Mon, 10 Jun 2019 17:03:10 GMT

Again, sorry for multiple posts. But the problem has been solved. I used this link:

https://devzone.nordicsemi.com/f/nordic-q-a/48190/how-to-switch-from-dfu-mode-to-start-nordic-uart-service

I am using Segger Embedded Studio to compile. In my project, I went to Options->Private Configurations -> Common -> Section Placement Macros and changed:

RAM_START=0x20002a98

RAM_START=0x20002aa8

So, the RAM start had to be moved. The RAM size is the same. So, is some code being dumped in the RAM before the application? And so, that code is not having sufficient space resulting in an overflow and thus my application is not being programmed?

RE: Combining BLE NUS and Buttonless DFU

Shiv — Mon, 10 Jun 2019 14:30:35 GMT

Sorry, the attachment did not load.devzone.nordicsemi.com/.../ble_5F00_app_5F00_uart_5F00_modified.zip