How can I generate timer interrupt for 300 sec STM32L0 series?

[Bhautik]

Hello

I have used Nucleo-L031K6 dev kit.

How can I generate timer interrupt for 100 sec/500 sec delay?

[KnarfB]

If the period is too long for a single timer, you can cascade two timers in a master/slave fashion. Alternatives are more frequent interrupts and a software counter in the interrupt handler or using the RTC.

hth

KnarfB

[Tesla DeLorean]

+1

RTC Alarm

[MM..1]

Clock your used timer with slow clock and use prescalers, example clk 8MHz prescaler 65534 use 16bit counter to time 100s

but i dont cleanly understand your question. You need delay or repeated interrupt or wake from low power...

[Bhautik]

Thanks KnarfB and clive1 for your update.

Can please give some sample code or hint like how can I calculate or configuration?

[Bhautik]

Thanks MM for your update.

Actually I want to generate timer interrupt. Ex : Require timer interrupt means after 5 min generate interrupt and device enter in to the sleep mode [low power mode].

How can I configure counter parameter setting for timer interrupt?

Can you please give some example how can I configure?

[Tesla DeLorean]

STM32Cube_FW_L0_V1.11.2\Projects\NUCLEO-L031K6\Examples\RTC\RTC_Alarm

'

RTC usually count in seconds,

Read the RTC chapter, it has TWO alarms. pick your time(s) into the future

https://www.st.com/resource/en/reference_manual/dm00108282-ultralowpower-stm32l0x1-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

[Bhautik]

Thanks clive1 for your input.

Is it possible using TIM1/TIM2 [general purpose timer]?

[Tesla DeLorean]

(65536 * 65536) / 32,000,000 = 134.217728 seconds, maximal

Depends on what speed you're clocking at, you could interrupt at seconds, and count those elapsing

100 seconds, 100 * 32,000,000 / 64000 = 50000

Prescaler = 64000-1

Period = 50000 - 1

[Bhautik]

Thanks clive,

I have configure TIM1 timer.

Please find attached timer configure image. Is configuration right?? can you please confirm.