Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

RE: Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

Håkon Alseth — Tue, 20 Aug 2024 14:51:38 GMT

Hi,

Could you share which zephyr git hash you forked from?

Kind regards,

Håkon

RE: Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

fbrs — Tue, 20 Aug 2024 13:24:11 GMT

Hi,

that's interesting. Your test is correct. We recreated it and got the following output:

We're using our own zephyr fork - maybe there are some compatibility issues between modules/packages. I will investigate it, thank you for your help!

RE: Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

Håkon Alseth — Tue, 20 Aug 2024 12:05:23 GMT

Hi,

Thank you for uploading the files.

Could you share what happens at your end? I'm unable to successfully recreate this scenario. I'm getting this output:

*** Booting nRF Connect SDK v2.7.0-5cb85570ca43 ***
*** Using Zephyr OS v3.6.99-100befc70c74 ***
timer1 error: -134 - failed to set alarm on channel 2
timer1 error: -134 - failed to set alarm on channel 3
timer2 error: -134 - failed to set alarm on channel 2
timer2 error: -134 - failed to set alarm on channel 3
TIMER1 Channel: 0 Ticks: 500000
TIMER1 Channel: 1 Ticks: 500000
TIMER2 Channel: 0 Ticks: 500000
TIMER2 Channel: 1 Ticks: 500000
TIMER3 Channel: 0 Ticks: 500000
TIMER3 Channel: 1 Ticks: 500000
TIMER3 Channel: 2 Ticks: 500000
TIMER3 Channel: 3 Ticks: 500000
TIMER4 Channel: 0 Ticks: 500000
TIMER4 Channel: 1 Ticks: 500000
TIMER4 Channel: 2 Ticks: 500000
TIMER4 Channel: 3 Ticks: 500000

-134 = ENOTSUP and that occurs due to the number of CC channels, which is limited by the counter implementation with -2:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.6.99-ncs2/drivers/counter/counter_nrfx_timer.c#L18

The (stripped) overlay file:

// &timer0 {
//     status = "okay";
//     prescaler = <4>;
// };

&timer1 {
    status = "okay";
    prescaler = <4>;
};

&timer2 {
    status = "okay";
    prescaler = <4>;
};

&timer3 {
    status = "okay";
    prescaler = <4>;
};

&timer4 {
    status = "okay";
    prescaler = <4>;
};

And the build/zephyr/zephyr.dts shows that the timer0 is disabled:

		timer0: timer@40008000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x40008000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x8 0x1 >;
			prescaler = < 0x0 >;
		};

Have I tested incorrectly? If yes, please have a look at my test here:

devzone.nordicsemi.com/.../331846.zip

Kind regards,

Håkon

RE: Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

fbrs — Tue, 20 Aug 2024 11:20:42 GMT

Hi,

thank you for your fast response. I reuploaded the files.

Best regards

RE: Other Timer/Counter setup fails if Timer0 is disabled using zephyr drivers for nRF52833

Håkon Alseth — Tue, 20 Aug 2024 10:51:54 GMT

Hi,

Looks like the attachments were not successfully uploaded. Could you re-upload them?

Kind regards,

Håkon