#include "stm32f4xx.h"
#include "stm32f4_discovery.h"
int counter;

int main(void)
{

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

	GPIO_InitTypeDef  GPIO_InitStructure;
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_TIM4);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_TIM4);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_TIM4);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15 ;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOD, &GPIO_InitStructure);

	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
	TIM_TimeBaseStructure.TIM_Period = 999;
	TIM_TimeBaseStructure.TIM_Prescaler = 83;
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseStructure.TIM_CounterMode =  TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure2;
	TIM_TimeBaseStructure2.TIM_Period = 9999;
	TIM_TimeBaseStructure2.TIM_Prescaler = 8399;
	TIM_TimeBaseStructure2.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseStructure2.TIM_CounterMode =  TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure2);

	TIM_OCInitTypeDef TIM_OCInitStructure;
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse = 0;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

	TIM_OC1Init(TIM4, &TIM_OCInitStructure);
	TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);

	TIM_OC2Init(TIM4, &TIM_OCInitStructure);
	TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);

	TIM_OC3Init(TIM4, &TIM_OCInitStructure);
	TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);

	TIM_OC4Init(TIM4, &TIM_OCInitStructure);
	TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);



	TIM_Cmd(TIM4, ENABLE);
	TIM_Cmd(TIM3, ENABLE);


	unsigned int i=0;
	unsigned int j=0;
	unsigned int k=0;
	unsigned int l=0;
	for(;;)
	{


		if(TIM_GetFlagStatus(TIM4, TIM_FLAG_Update)) {

			TIM_ClearFlag(TIM4, TIM_FLAG_Update);
		}
		if(TIM_GetFlagStatus(TIM3, TIM_FLAG_Update)) {
			if(i==14)
				i=0;
			if(j==13)
				j=0;
			if(k==12)
				k=0;
			if(l==11)
				l=0;
			TIM4->CCR1 = i*100;
			TIM4->CCR2 = j*100;
			TIM4->CCR3 = k*100;
			TIM4->CCR4 = l*100;
			i++;
			if(i>1)
				j++;
			if(j>1)
				k++;
			if(k>1)
				l++;
			TIM_ClearFlag(TIM3, TIM_FLAG_Update);
		}




	}
}