#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"

#define LED1 GPIOD, GPIO_Pin_12
#define LED2 GPIOD, GPIO_Pin_13
#define LED3 GPIOD, GPIO_Pin_14
#define LED4 GPIOD, GPIO_Pin_15
#define button GPIOA, GPIO_Pin_0

GPIO_InitTypeDef GPIO_InitStruct;

static void GPIO_setup(void)
{
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_15 | GPIO_Pin_14 | GPIO_Pin_13 | GPIO_Pin_12; // we want to configure all LED GPIO pins
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT; 		// we want the pins to be an output
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; 	// this sets the GPIO modules clock speed
	GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; 	// this sets the pin type to push / pull (as opposed to open drain)
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; 	// this sets the pullup / pulldown resistors to be inactive
	GPIO_Init(GPIOD, &GPIO_InitStruct);
}

static void button_setup(void)
{RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;		  // we want to configure PA0
		GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN; 	  // we want it to be an input
		GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;//this sets the GPIO modules clock speed
		GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;   // this sets the pin type to push / pull (as opposed to open drain)
		GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_DOWN;   // this enables the pulldown resistor --> we want to detect a high level
		GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void clearBits()
{
	GPIO_ResetBits(GPIOD, GPIO_Pin_12 | GPIO_Pin_13 |GPIO_Pin_14 |GPIO_Pin_15);
}

void lightLed(int number)
{
	clearBits();
	switch(number)
	{
		case 0:
		{
			clearBits();
			GPIO_SetBits(GPIOD, GPIO_Pin_12);
		}

		case 1:
		{
			clearBits();
			GPIO_SetBits(GPIOD, GPIO_Pin_13);
		}

		case 2:
		{
			clearBits();
			GPIO_SetBits(GPIOD, GPIO_Pin_14);
		}

		case 3:
		{
			clearBits();
			GPIO_SetBits(GPIOD, GPIO_Pin_15);
		}

		case 4:
		{
		}
	}
}

void lock()
{
	while(GPIO_ReadInputData(GPIO_Pin_0 == 1))
	{
	}
}

void Delay(__IO uint32_t nCount)
{
  while(nCount--)
  {
  }
}

int main(void)
{
	GPIO_setup();
	button_setup();
	GPIO_ResetBits(GPIOD, GPIO_Pin_12 | GPIO_Pin_13 |GPIO_Pin_14 |GPIO_Pin_15 );

	task_2();
}