#include "stm32f0xx.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_rcc.h"
#include "stm32f0xx_tim.h"
#include "stm32f0xx_misc.h"
#include <stdlib.h>
#include <stddef.h>
#include <math.h>


void init_Timer(void);
void init_iO(void);

int main(void)
{
	SystemInit();
	SysTick_Config(SystemCoreClock/100);
	init_iO();
	init_Timer();
	while(1)
	{
	}
	return 0;
}

void SysTick_Handler(void)
{

}

void init_Timer(void)
{
	TIM_TimeBaseInitTypeDef TIM_TimeBase_InitStructure;

	//Takt für Timer 14 einschalten
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
	//Timer 14 konfigurieren
	TIM_TimeBase_InitStructure.TIM_ClockDivision  = TIM_CKD_DIV1;
	TIM_TimeBase_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBase_InitStructure.TIM_Period = 100;					//Perioden 4/100=> 40kHz
	TIM_TimeBase_InitStructure.TIM_Prescaler = 12;					//Vorteiler 48/12 => 4MHz
	TIM_TimeBase_InitStructure.TIM_RepetitionCounter = 0;

	TIM_TimeBaseInit(TIM14, &TIM_TimeBase_InitStructure);
	// Timer14 einschalten
	TIM_Cmd(TIM14, ENABLE);

	//PWM konfigurieren
	TIM_OCInitTypeDef outputChannelInit;
	TIM_OCStructInit(&outputChannelInit);

	outputChannelInit.TIM_OCMode = TIM_OCMode_PWM1;
	outputChannelInit.TIM_OutputState = TIM_OutputState_Enable;
	outputChannelInit.TIM_OCPolarity = TIM_OCPolarity_High;
	outputChannelInit.TIM_OCIdleState = TIM_OCIdleState_Reset;
	outputChannelInit.TIM_OCNIdleState = TIM_OCNIdleState_Set;
	outputChannelInit.TIM_Pulse = 80;									//80Pulse von 100 high

	TIM_OC1Init(TIM14, &outputChannelInit);
	TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);

	GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_0);
}

void init_iO(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;

	//init PWM Pin
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

	GPIO_Init(GPIOA, &GPIO_InitStructure);
}