[NECTO Studio 2.1.0: Timer Calculator] STM32F4xx: Wrong reload value setting for timer 2

[frank.malik]

Hello,

tried to get a 1ms interrupt on the Fusion v8 for STM32 board.
Using the timer calculator I got the following settings:

TimerCalculator_STM32F4xx_168MHz_timer2_1ms.png (18.69 KiB) Viewed 611 times

However, with this setting I got a 2ms interrupt.

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168MHz / 2 = 84MHz

PSC is 2, means the division is by 3.

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84MHz / 3 = 28MHz

ARR is set to 56000-1

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28MHz / 56000 = 500Hz, means 2ms interrupt cycle.

Either setting ARR to 28000-1, or setting PSC to 1 and ARR to 42000-1 will give the correct results.

[filip]

Hi,

Thank you for reporting this, I have passed this to our development team.

Regards,
Filip.