Power consumption increase when adding MCUBOOT with BT OTA DFU

RE: Power consumption increase when adding MCUBOOT with BT OTA DFU

ananda.nogueira — Tue, 26 Mar 2024 11:46:47 GMT

Hi Simon,

It worked, the current consumptions are the same now!

Thank you very much!

Best regards,

Ananda

RE: Power consumption increase when adding MCUBOOT with BT OTA DFU

Simonr — Tue, 26 Mar 2024 08:49:05 GMT

MCUBoot is a "child image", and the build of child images are defined in the project's "child_image" folder (you may need to create one). For MCUBoot this is "child_image/mcuboot.conf" and the overlays are in "child_image/mcuboot/boards".

Best regards,

Simon

RE: Power consumption increase when adding MCUBOOT with BT OTA DFU

ananda.nogueira — Mon, 25 Mar 2024 12:29:32 GMT

Hi Simon,

Thanks for the reply.

When comparing the build/zephyr/zephyr.dts and build/mcuboot/zephyr/zephyr.dts I noticed that there are indeed some differences. Certain features are enabled in mcuboot but disabled in the normal build. These features include: uart0, spi1, pwm0, usbd, qspi and spi3.

I have an overlay file in wich I disable this modules like this:

&uart0 {
status = "disabled";

};
&spi1 {
status = "disabled";
};
&pwm0 {
status = "disabled";
};
zephyr_udc0: &usbd {
status = "disabled";
};
&qspi {
status = "disabled";
};
arduino_spi: &spi3 {
status = "disabled";
};

Can you tell me how to disable these things in mcuboot as well, please?

Best regards,
Ananda

RE: Power consumption increase when adding MCUBOOT with BT OTA DFU

Simonr — Mon, 25 Mar 2024 10:14:10 GMT

Hi Ananda

Can you compare your build/zephyr/zephyr.dts and build/mcuboot/zephyr/zephyr.dts to verify if they are the same? As if they are not set up identically, the MCUBoot might be enabling something that the application does not resulting in this higher current consumption. A normal problem here is that one of the serial instances are enabled by default in the MCUBoot that will result in a current consumption increase similar to what you're seeing.

Best regards,

Simon