PWM Signal mit STM32

#include <stm32f30x.h>

#include <stm32f30x_gpio.h>

#include <stm32f30x_rcc.h>

#include <stm32f30x_tim.h>      // for Timer

// prototypes

void InitializeTimer(int period);

void InitializeLEDs(void);

void InitializePWMChannel(void);

void RCC_Configuration(void);

void InitializeTimer(int period)

{

    // 1kHz Signal

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitTypeDef timerInitStructure;

    timerInitStructure.TIM_Prescaler = 71;

    timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;

    timerInitStructure.TIM_Period = period;

    timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;

    //timerInitStructure.TIM_RepetitionCounter = 0;

    TIM_TimeBaseInit(TIM2, &timerInitStructure);

    TIM_Cmd(TIM2, ENABLE);

}

void InitializePWMChannel()

{

    TIM_OCInitTypeDef outputChannelInit; // = {0,};

    outputChannelInit.TIM_OCMode = TIM_OCMode_PWM1;

    outputChannelInit.TIM_OCIdleState = TIM_OCIdleState_Reset;

    outputChannelInit.TIM_OCNIdleState = TIM_OCNIdleState_Set;

    outputChannelInit.TIM_OutputState = TIM_OutputState_Enable;

    outputChannelInit.TIM_OutputNState = TIM_OutputNState_Disable;

    outputChannelInit.TIM_OCPolarity = TIM_OCPolarity_High;

    outputChannelInit.TIM_OCNPolarity = TIM_OCNPolarity_High;

    outputChannelInit.TIM_Pulse = 100;

    TIM_OC1Init(TIM2, &outputChannelInit);

}

void InitializeLEDs()

{

    GPIO_InitTypeDef gpioStructure;

    gpioStructure.GPIO_Pin = GPIO_Pin_0;

    gpioStructure.GPIO_Mode = GPIO_Mode_AF;

    gpioStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_Init(GPIOA, &gpioStructure);

    //GPIO_PinAFConfig (GPIOA, GPIO_PinSource0, GPIO_AF_2);   //??

}

void RCC_Configuration()

{

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);    // Enable peripheral clock for Timer2

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);     // Enable peripheral clock for GPIOA

}

int main ()

{

    RCC_Configuration();

    InitializeLEDs();

    InitializeTimer(999);

    InitializePWMChannel();

    while(1)

        {

        } //while(1)

} //main