nRF52832 is not going to Deep Sleep Mode

RE: nRF52832 is not going to Deep Sleep Mode

Sri1998 — Mon, 12 Aug 2024 05:13:45 GMT

Thank you Susheel. I will make the appropriate changes.

RE: nRF52832 is not going to Deep Sleep Mode

Susheel Nuguru — Fri, 09 Aug 2024 09:02:00 GMT

undefined device tree nodes are simple to debug. You just follow the instructions mentioned here.

Most of the time it is just a missing or misconfigured device node.

In the <build>/zephyr/include/generated/devicetree_generated.h., node 70 is as below

 *   70  /soc/uart@40002000

So uart does not seem to be enabled in the device tree in your board files. I added this in your custom board overlay filed

&uart0 {
	status = "okay";
};

and added these in the prj.conf file

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

This fixes the device tree error.

RE: nRF52832 is not going to Deep Sleep Mode

Sri1998 — Thu, 08 Aug 2024 10:55:23 GMT

I am trying to compile the System Off example by creating a new application from sample. I have made a custom board for nRF52832 and created board files for the board following the Dev Academy Exercise. When compiling the example code getting below error:

c:/ncs/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: app/libapp.a(main.c.obj): in function `main':
C:/Harsha/Echotag/Firmware/system_off/src/main.c:75: undefined reference to `__device_dts_ord_70'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Can you please verify the error and suggest me a way to overcome it.

PFA the code and the custom board created

Regards,

Sri

devzone.nordicsemi.com/.../Customboard.zip

devzone.nordicsemi.com/.../4572.system_5F00_off.zip

RE: nRF52832 is not going to Deep Sleep Mode

Susheel Nuguru — Tue, 30 Jul 2024 12:25:39 GMT

Few things,

Hundreds of users have used LIS3DH sensor with nrf52832, and it works just fine. No issues with hardware or drivers.
30mA power consumption does not sound right, I do not think that our SoC can consume that much. Check if you are working on the custom board and if the board is designed right.
Connect the pins of the LIS3DH to the logic analyzer or similar and see if there is any data coming out of it or not. If there is no valid data from the sensor, then check if it is configured correctly.