TIMER CC register issue

[IvanD]

Hello,

I am experiencing some CC register issue in Timer of nRF51822. I am trying to setup TIMER1 for 16 seconds. But I see, that when I try to write to CC registers, the value is cut to 16-bit:

write: NRF_TIMER0->CC[0] = 500000; //(0x7A120)

read: CC0 = 41248 //(0xA120)

I've also tried to write into register manually in debug mode, but seen the same cutting to 16-bit. CC register is 32-bit and this does not have to happen. I know that for some revisions BITMODE limits the length of TIMER0. But I've tried this with TIMER1 and TIMER2. Also writing to CC does not have to be affected and I've tried changing BITMODE as well.

As the result, with NRF_TIMER_FREQ_31250Hz I get timer running only a little bit more than 1 second.

Have someone experiencing the same? Or can anyone explain what can be the problem?

P.S. I am using S110, but it is not started at this point. Chip is nRF51822 QFAAH0 1511BR.

[Wojtek]

Default BITMODE for timers is 16bit. You can switch between 16/8/24/32 in TIMER0, and between 16/8 in TIMER1 and TIMER2.

TIMER0 is used by softdevice, you cannot use it in your app when softdevice is enabled.

I suggest using app_timer library instead.(based on RTC, which makes it energy friendly)

[IvanD]

Thanks. Clear.

[Wojtek]

Please mark my answer as corrent then :)