#include "stm32f4xx.h"

int i=0;
int c=0;
double freq = 50;
double PrescalerValue = 30;
double value = 0;

void timer4config(void);
void timer3config(void);
void timer5config(void);


int main(void)
{
	// PC0
	// PD12
	// PA0
	value = (uint16_t) (SystemCoreClock/freq/(PrescalerValue+1))-1;;
	timer3config();
	for (i=0; i<10700; i++) {
		c++;
	}
	timer4config();
	c =0 ;
	for (i=0; i<10700; i++) {
			c++;
	}
	timer5config();
}

void timer3config(void)
{
	// Structures
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;

	// Enable TIM3 Clock
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

	// Enable GPIOC Pin
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

	// Initialise  pins 6 C
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
	GPIO_Init(GPIOC, &GPIO_InitStructure);

	GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_TIM3);


	// Setup timer defaults
	TIM_TimeBaseStructure.TIM_Period = value;
	TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;


	// Configure timer for PWM - channel 1
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse =  value/2;
	TIM_OC1Init(TIM3, &TIM_OCInitStructure);
	TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

	TIM_ARRPreloadConfig(TIM3, ENABLE);

	// Start timer
	TIM_Cmd(TIM3, ENABLE);
}

void timer4config(void)
{
	// Structures
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;

	// Enable TIM4 Clock
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

	// Enable GPIOD Pin
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

	// Initialise  pins 12D
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_12;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
	GPIO_Init(GPIOD, &GPIO_InitStructure);

	GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);


	// Setup timer defaults
	TIM_TimeBaseStructure.TIM_Period = value;
	TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;


	// Configure timer for PWM - channel 1
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse =  value/2;
	TIM_OC1Init(TIM4, &TIM_OCInitStructure);
	TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);

	TIM_ARRPreloadConfig(TIM4, ENABLE);

	// Start timer
	TIM_Cmd(TIM4, ENABLE);
}

void timer5config(void)
{
	// Structures
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;

	// Enable TIM4 Clock
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);

	// Enable GPIOD Pin
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

	// Initialise  pins 12D
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_PinAFConfig(GPIOA, GPIO_PinSource0, GPIO_AF_TIM5);


	// Setup timer defaults
	TIM_TimeBaseStructure.TIM_Period = value;
	TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

	TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);

	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;


	// Configure timer for PWM - channel 1
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse =  value/2;
	TIM_OC1Init(TIM5, &TIM_OCInitStructure);
	TIM_OC1PreloadConfig(TIM5, TIM_OCPreload_Enable);

	TIM_ARRPreloadConfig(TIM5, ENABLE);

	// Start timer
	TIM_Cmd(TIM5, ENABLE);
}