Timer under 5ms

RE: Timer under 5ms

dblasco — Thu, 08 Oct 2015 10:24:56 GMT

You both were right! I had to change APP_TIMER_PRESCALER to 3 so 1ms were at least 5 ticks. Now it is working.

Thank you very much!

RE: Timer under 5ms

Susheel Nuguru — Thu, 08 Oct 2015 07:18:57 GMT

you have set timeout_ticks = 1024*0.001 = 1. So like Krzysztof Chruściński has mentioned below, your app_timer_start function should have returned with error NRF_ERROR_INVALID_PARAM (0X07) because it needs to be a minimum of 5 ticks. Change it according to Krzysztof Chruściński 's answer

RE: Timer under 5ms

Krzysztof Chruscinski — Wed, 07 Oct 2015 19:36:44 GMT

You are hitting minimum acceptable timeout_ticks value.

@param[in] timeout_ticks Number of ticks (of RTC1, including prescaling) to time-out event *
(minimum 5 ticks).

app_timer_start should return error code in that case.

If you want to have 1ms tick you need to decrease APP_TIMER_PRESCALER so that 1ms is more than 5 ticks.

RE: Timer under 5ms

dblasco — Wed, 07 Oct 2015 13:44:43 GMT

i edited the question with it! it is 1024 so 1024*(31+1)=32768 the frequency of the slow crystal

RE: Timer under 5ms

Susheel Nuguru — Wed, 07 Oct 2015 12:50:35 GMT

can you post what is the value ofAPP_TIMER_MULTIPLICADOR