SysTick Maths

[officialkesh]

Posted on December 04, 2013 at 05:22

Hello ,

            I have configured systick for 1 ms in Discovery Board using Systick_config function.But I am not getting properly 1 ms...

SystemCoreClock = 144 MHz...

Urgent Help needed ......                 #stm32-systick

[Tesla DeLorean]

Posted on December 04, 2013 at 17:50

http://www.catb.org/~esr/faqs/smart-questions.html#urgent

Help needed ...... The math is simple, perhaps it is the clock settings that are wrong? Check your PLL settings/sources in system_stm32f4xx.c, and output clocks via MCOx or TIM pins to confirm the core is actually running at the speed you want. Or avoid hard coded values?   uint32_t SystemCoreClock = ((HSE_VALUE / PLL_M) * PLL_N) / PLL_P;