Which timer is used by ESB and app_timer_init() in nRF52832

[chianglin]

Hi,

Would you please tell me which timer had been used by ESB and app_timer_init() function?

Which register can I get the current timer count value of above timer?

Thank you,

Chianglin

[chianglin]

I had found app_timer is use RTC0.

I had try to read the values of RTC0 register value (ex. EVENTS_COMPARE[[0]~[2], CC[0]~[2]), but the value is always "0x00000000".

I can make sure the app_timer is active because I use app_time to print register value.

Would you please tell me why I can not read the value?

Thank you,

Chianglin

[bjorn-spockeli]

Hi Ives,

the HW resources used by the ESB protocol is listed here. You need to read the COUNTER register, not the EVENTS_COMPARE registers. 

Best regards
Bjørn

[chianglin]

Hi Bjørn,

I try to get "NRF_RTC0->COUNTER" in main loop by following program.

gRTC_Value.COUNTER = NRF_RTC0->COUNTER;

And I had print "gRTC_Value.COUNTER“ value in 1 sec app_timer, but the value is always 0.

Would you please tell me how can I get correct RTC0 COUNTER?

Thank you,

Chianglin

[bjorn-spockeli]

HI Ives, 

the Application Timer library uses RTC1, not RTC0, see nRF5 SDK v15.3.0: Application Timer. Try reading the RTC1 counter instead.

Best regards 

Bjørn