Integrating DTM functionality into an app with softdevice

RE: Integrating DTM functionality into an app with softdevice

pajo — Wed, 08 Nov 2017 15:10:25 GMT

Thanks Sigurd. That makes sense. What I want to do is feasible, but I need to be careful about interrupts.

RE: Integrating DTM functionality into an app with softdevice

pajo — Wed, 08 Nov 2017 15:07:52 GMT

Thanks for your response John!

RE: Integrating DTM functionality into an app with softdevice

Sigurd — Wed, 08 Nov 2017 14:58:27 GMT

Hi,

Your approach is feasible, and this can be done inside the same app. On step 3, you also need to make sure that all interrupts that are used by the application are disabled, so when you are in DTM mode you will not get any interrupts that was enabled by either the application code or the SoftDevice code.

The approach John DeWitt describes is a bit more safe and simple, since you enter the mode you want on startup/initialization, and need to power cycle to change mode. With this approach you don't need to take care of "uninitializing" the application code before entering DTM mode.

RE: Integrating DTM functionality into an app with softdevice

John — Tue, 07 Nov 2017 21:37:50 GMT

We do have the DTM test and our app in a single image. The way we manage control is a bit more heavy handed than your proposed use of a button press while the device is already running. What we do is check a pin (could be controlled by a button, but we use a test fixture), during initialization and if that pin is pulled low we give control to the DTM code. If the pin is high, we boot normally and the soft device and our application take control. It requires a power cycle to activate DTM, but it works very well and it's simple.