51822 SDK 12.3 DFU setting

[June6]

Hi Sir,

In this project, we design with nRF51822-QFAA (Flash: 256KB, RAM: 16KB) and developed the application and bootloader through the nRF51-DK (pca10028).The file path is nRF5_SDK_12.3.0_d7731ad\examples\dfu\bootloader_secure\pca10028_debug\arm5_no_packs

We hope to test and upgrade the application through the DFU in nrf51-dk board.

Due to the RAM size is difference with nRF51822-QFAC. We need to change the default values in the program.

The default Settings are as follows.

  IROM1 Start: 0x36000  Size: 0x9C00                 IRAM1 Start: 0x20002C00  Size: 0x5380

After using the above IROM and IRAM Settings and upgrading the boot loader file to nrf51822-qfaa (program with nRFGo studio or nrfjprog), the boot loader cannot work and I cannot see the device name "DFUTarg".(program SD + boot loader)

But nRF51822 - QFAC can

Thank you.
June6

[Sigurd]

 Hi,

For the nRF51822-QFAA variant, try to use  IRAM1 Start: 0x20002C00 Size: 0x1380 instead.

[June6]

I've tried this before, and there are new problems

Looks like there's no space for anything

[June6]

Hi，Sigurd

Do you have a solution?

[Sigurd]

Yes, try IRAM1 Start: 0x20002600 Size: 0x1A00 instead.

[June6]

All right, everything's working fine. But how did you get that. And what do I do when I change it to QFAB or change to other chips like 52832