DTMを含んだアプリケーションソフトについて

[mo_mm]

HI

[environment]
· NRF 51822
· SDK 12.3

We are developing application software including DTM.

In the application software, a flag to start DTM using FDS is written in the FLASH area.
During DTM operation, the soft device is disabled and it is operating.
Even if FT is used to write DTM start flag after soft device is set to enable when returning from DTM, no event occurs.

Should not FDS be used in application software including dtm?
soft device, fds Do I need to wait for startup completion at startup?

sequence:
1.pminit soft device enable execution

2. Read dtm activation flag from FLASH area

3. Execute the software device disable

4. Start dtm

5. fdsinit soft device enable execution

6. Write invalid in start flag

Thanks.

[Kenneth]

Hi,

You can find a simple description in chapter 3.3 on how to for instance enable DTM mode:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.appnotes/dita/appnotes/pdflinks/nan_34.html?cp=10_3 

A typical sequence can be.

1. The application want to enter DTM mode (for instance a pin is pulled low or a command is received over BLE)
2. The application write a magic word to the GPREGRET register and execute a soft reset (NVIC_SystemReset()).
4. On reset, check if RESETREAS register is from soft reset.
5. If reset from soft reset then check GPREGRET value, else execute application.
6. If GREGRET value equal magic word then execute DTM, else execute application.

There is no need to write to flash or use FDS.

Best regards,
Kenneth

[mo_mm]

Thanks to you I was helped.