Temp device tree node

[Miguel Ferreira]

Hi,

I want to use the temp node from the Device Tree of nrf52840. However, when I do something like this:

#define TEMP_NODE DT_NODELABEL(temp)
#define TEMP_DEVICE DEVICE_DT_GET(TEMP_NODE)

I have an error saying : undefined reference to `__device_dts_ord_xx' . However, if I enable CONFIG_SENSOR it works. Is possible to use the node without the need to enable the CONFIG_SENSOR ?

Thanks!

[nordicator_prim3]

Hi,

The driver that allows you to control / access that device uses the sensor api. So for that reason, you must enable CONFIG_SENSOR to be able to use it.

If you don't want to use the sensor api, then you would have to write your own driver to interface with the temp device, but I would recommend just using it as is.

Here is a good sample program that uses the die temp device.

[Miguel Ferreira]

Hi,

Im aware of this example, however I dont want to use the Sensor API and I developed my own driver. In this case I just pretend to access the temp node : temp: temp@4000c000

Thanks!

[Vidar Berg]

Hi,

The MSPL will reserve access to the TEMP peripheral if you are enabling Bluetooth in application. TEMP is used for clock calibration when the internal RC oscillator is selected as the clock source.

In that case, you can request temperature readings using the mpsl_temperature_get() function.

e.g.,

#include <mpsl_temp.h>

    ...
    printk("Temperature %d\n", mpsl_temperature_get() / 4);

Best regards,

Vidar

[Miguel Ferreira]

Hi,

Thanks! Yeah that seems to be the case! Thank you!