nrf_delay_ms not working correctly after porting to SDK 16

[YYZ]

Hi, I am porting an app from SDK 14.2 to SDK 16 (nrf52832) and noticed some strange behaviour with nrf_delay_ms - it is not delaying anywhere nearly long enough. I have built a sample program and tested with 14.2 with a delay of 1000 ms and it works as expected. To get the same behaviour with 16 I have to pass a value of about 5000000 to get a 1000 ms delay. I'm sure I must be missing something obvious but can't really see what? I noticed the delay code has changed significantly between 14.2 and 16.

Apologies if this has been asked before but I have looked but I could not find any reference to this problem.

The test program does NOT use a soft device.

Thanks for your help!

#include <stdlib.h>
#include "nrf_delay.h"
#include "boards.h"

int main()
{
    //
    // Initialise the board.
    //
    nrf_gpio_cfg_output(LED_A);

    //
    // Loop forever toggling the led ON/OFF
    //
    bool setOn = true;
    while (true)
    {
        if(setOn)
        {
            nrf_gpio_pin_set(LED_A);
        }
        else
        {
            nrf_gpio_pin_clear(LED_A);
        }
        setOn = setOn ? false : true;
        // nrf_delay_ms(5000000);
        nrf_delay_ms(1000);
    }
}

[run_ar]

Hi,

Could you try the blinky project in nRF5SDK160098a08e2\examples\peripheral\blinky\ and see if that behaves the same way? Then you can compare that project to your project to see what the difference is.

[YYZ]

Hi,

Just tried it and exactly the same behaviour - a value of 5000000 is required to get a delay of about 1 second.

However, I have now managed to fix the problem. The issue is that there is more than one version of nrfx_glue.h in the SDK and my build procedure was including the wrong one. The one my build procedure was picking up has an empty definition for NRFX_DELAY_US(us_time).

I changed my build procedures include search paths from having:

nRF5SDK160098a08e2/modules/nrfx/templates

to:

nRF5SDK160098a08e2/integration/nrfx

and this now appears to include the correct version of nrfx_glue.h and nrf_delay_ms now behaves as expected.

Anyway, thanks for your help!