#include "stm32f4xx.h"
#include "stm32f4_discovery.h"

int main(void) {
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

	GPIO_InitTypeDef GPIO_InitStructure;
	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 = 9999;
	TIM_TimeBaseStructure.TIM_Prescaler = 8399;
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

	TIM_Cmd(TIM4, ENABLE);

	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);

	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);

	TIM4->CCR1 = 20.0 / 100 * 10000;
	TIM4->CCR2 = 40.0 / 100 * 10000;
	TIM4->CCR3 = 60.0 / 100 * 10000;
	TIM4->CCR4 = 90.0 / 100 * 10000;

	for (;;) {

	}
}