Fixed clock source for timer.

[T IJ]

Hello,

Is it possible to set the clock source for a timer to the RC oscillator?

I'm using Bluetooth in combination with my timer and I see that it is counting differently when the  softdevice switches over from RC to XTAL for BLE stuff.

Normally this isn't an issue but I need to do things at a fixed interval whilst having random Bluetooth events running in the background.

[Dmitry]

Hi,

no, the chip has only one HFCLK controller clocked either from HFINT or HFXO. You can force HFXO to run all the time with sd_clock_hfclk_request() function (this will increase current consumption somewhat). If 30.5 usec resolution is sufficient for you, it's better to use RTC clocked from LFCLK instead of timer.

[T IJ]

Thanks, the RTC isn't fast enough for my purpose.

I'll have to find a different technique then.