k_uptime_get()

[Learner]

I need to keep track of the time elapsed since boot-up using the function k_uptime_get() but it is always returning zero (0).

I am using an nRF5340PDK and Zephyr OS build v2.3.0-rc1-ncs1. The IDE used is SES for ARM (Nordic Edition) v5.10d (64-bit) running under windows 10.

This is what I am doing in my code.

#include <zephyr.h>

#include <kernel.h>

#include <sys/printk.h>

#include <stdio.h>

s64_t time_ms = k_uptime_get();

printf( "Booting-up @%i: \n", time_ms );

printk( "%i: ", time_ms );

Can someone please help?

Kind regards

Mohamed

[Simon]

Try the following:

/*
 * Copyright (c) 2012-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

//#include <zephyr.h>
#include <sys/printk.h>
#include <stdio.h>
#include <zephyr.h>
//#include <kernel.h>

void main(void)
{
	s64_t time_ms = k_uptime_get();
	//printf( "Booting-up @%i: \n", time_ms );
	//printk( "%i\n: ", time_ms );
	printk("Time %" PRId64 "\n", time_ms);

	printk("Hello World! %s\n", CONFIG_BOARD);
}

If you're using a newer version of NCS (e.g. v1.4.0, which I'm using), you have to set CONFIG_DEPRECATED_ZEPHYR_INT_TYPES=y in the prj.conf

Best regards,

Simon

[Learner]

Hi Simon,

Happy new year to you.

Thank you for your answer and apologies for my late reply. I've only just noticed your post.

I am using NCS v1.3.0.

I can now get non-zero times using the following lines of code.

#include <zephyr.h>
#include <kernel.h>
#include <sys/printk.h>
#include <stdio.h>

s64_t time_ms = k_uptime_get();

time_ms = k_uptime_get();
printk( "%i: ", (int)time_ms );

Kind regards

Mohamed

[Simon]

Happy new year to you as well.

I'm happy you found a solution

Best regards,

Simon

[Learner]

Hi Simon,

The message from zetispagant two days ago looks suspicious. Is it?

Thank you for looking into this.

Kind regards

Mohamed

[ovrebekk]

Hi 

Looks like a spam account, yes. I have deleted the reply. 

Best regards
Torbjørn