bellow I wrote my SysTick code. It's works but i have problem with time couting:
GPIOB_PTOR |= (1<<0);
SYST_RVR = SysTick_RVR_RELOAD(6000000);
SYST_CVR = SysTick_CVR_CURRENT(0);
SYST_CSR |= SysTick_CSR_ENABLE_MASK | SysTick_CSR_TICKINT_MASK | SysTick_CSR_CLKSOURCE_SHIFT;
Default i have 48MHz system clock and 8MHz external oscillator. Why LED doesn't toggle once for a second (now it's mutch longer)? Maybe I forgot about something important?