TIM for rogalson

void setupTimer(uint32_t mikrosekundy) {
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    uint32_t ARR = 0;
    uint16_t PSC = 0;

    if (mikrosekundy >= 10 && mikrosekundy <= 30000000) {
        ARR = (mikrosekundy * (SystemCoreClock / 1000000)) - 1;
        if (ARR > 0xFFFF) {
            PSC = (ARR / 0xFFFF) - 1;
            do {
                PSC++;
                ARR = (((SystemCoreClock / 1000000) * mikrosekundy) / (PSC + 1)) - 1;
            }
            while ((mikrosekundy * (SystemCoreClock / 1000000) % (ARR + 1)) != 0);
        }
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

        /* TIM1 Configuration */
        TIM_DeInit(TIM1);
        TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
        TIM_OCStructInit(&TIM_OCInitStructure);
        /* Time base configuration */
        TIM_TimeBaseStructure.TIM_Period = ARR;
        TIM_TimeBaseStructure.TIM_Prescaler = PSC;
        TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

        /* Output Compare PWM Mode configuration */
        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; /* low edge by default */
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_Pulse = 0x01;
        TIM_OC4Init(TIM1, &TIM_OCInitStructure);

        /* TIM1 enable counter */
        TIM_Cmd(TIM1, ENABLE);

        /* Main Output Enable */
        TIM_CtrlPWMOutputs(TIM1, ENABLE);

    }
}