NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

Menon — Tue, 28 Mar 2023 13:08:17 GMT

Hello,

[quote user="SM_"]

or System off I used the Zephyr nRF5x System Off demo example.

but from above example I used below lines of code only, and rest of the code is commented.

void main(void){

pm_state_force(0u, &(struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});

k_sleep(K_SECONDS(SLEEP_S));

printk("ERROR: System off failed\n");

while (true) {

// spin to avoid fall-off behavior

[/quote]

Implementation looks good for me . Is there any peripheral connected to the chip while measuring? Take a look at this old thread of my colleague where he shared a sample for testing the same. Please try this and report back.

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

SM_ — Fri, 24 Mar 2023 15:44:00 GMT

Hi Menon,

1. For System off I used the Zephyr nRF5x System Off demo example.

but from above example I used below lines of code only, and rest of the code is commented.

void main(void){

pm_state_force(0u, &(struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});

k_sleep(K_SECONDS(SLEEP_S));

printk("ERROR: System off failed\n");

while (true) {

// spin to avoid fall-off behavior

}

2. You are talking about k_sleep(); this function right or any other function is used.

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

Menon — Fri, 24 Mar 2023 14:38:03 GMT

Hello,

[quote user="SM_"]Now I'm getting the 4uA current in SYSTEM OFF mode after disabling the Serial.[/quote]

That still looks bit high, how you are entering the system OFF Mode?

[quote user="SM_"]But I want to put the DK into the Suspend mode for my application, so how to put it in suspend mode or which function is used for it.[/quote]

I don't have any sample which does this. I guess most of sample uses sleep function for doing this.

Kind Regards,

Abhijith

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

SM_ — Thu, 23 Mar 2023 17:25:03 GMT

Hi Menon,

Thanks for reply,

All the settings for DK I have already made.

Now I'm getting the 4uA current in SYSTEM OFF mode after disabling the Serial.

But I want to put the DK into the Suspend mode for my application, so how to put it in suspend mode or which function is used for it.

Please help me regarding this.

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

Menon — Tue, 21 Mar 2023 13:06:09 GMT

Hello,

Sorry for the time I took here. I was on sick leave last day which is why I haven't responded so far.

While looking at your screenshot I guess you are using PPK1, which is kind of old that's probably the reason for lot of noises in the screenshot. Could you share the details of your setup for measuring the current from nRF52840DK. I suggest you to go through the Preparing DK (section9.1) under the Measuring current section inside the product specification. I also suggest to go through the power profiler user guide for setting up correctly.

AFAIK, the difference between the new zephyr power management states, that you have pointed, is that PM_STATE_SOFT_OFF works when the device is in non-runtime sleep mode (system OFF) and on the other hand PM_STATE_SUSPEND_TO_RAM and PM_STATE_SUSPEND_TO_IDLE works in system ON sleep mode. So generally current consumption will be less in system off sleep mode. Please see this thread which explains some of these things. But what you are seeing is high and I guess it is because of the set-up issue.

Kind Regards,

Abhijith

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

Menon — Fri, 17 Mar 2023 08:58:24 GMT

Hello,

Sorry I was bit occupied with one of my other case last days. I have started looking into this and I will try to reply it by today.

Kind Regards,

Abhijith

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

SM_ — Fri, 17 Mar 2023 08:39:15 GMT

Hi,

Is there any update over this?

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

SM_ — Tue, 14 Mar 2023 17:49:32 GMT

Hi,

its nRF52840 dk

RE: NRF52 High power consumption on in PM_STATE_SUSPEND_TO_IDLE/PM_STATE_SUSPEND_TO_RAM state - Zephyr

Menon — Tue, 14 Mar 2023 12:54:46 GMT

Hello,

Bit confusing as you mentioned nRF52PDK but I can see nRF52840 inside the screenshot. Could you confirm this?

Kind Regards,

Abhijith