#include "main.h"

int main(void){
	unsigned long Delay=500;
	char flag=0;
	LED_Init();
	Key_Init();
	// Wait until PushButton is pressed PA0=1
	while(!GPIO_ReadInputDataBit(Key_Port,Key_Pin));
	
	while(1){
		Set_Reset_LED1(Delay%1000);
		if(Delay==1000) flag=1;
		if(Delay==0   ) flag=0;
		if(GPIO_ReadInputDataBit(Key_Port,Key_Pin)){
			if(flag==0) Delay++;
			if(flag==1) Delay--;
		}
	}
}
//--------------------------------------------------------------------
void Key_Init(void){
  GPIO_InitTypeDef  GPIO_InitStructure;
	/* GPIOA Periph clock enable */
	RCC_AHB1PeriphClockCmd(KEY_GPIO_RCC, ENABLE);
  /* Configure PA0 in input mode */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
}
//--------------------------------------------------------------------
void LED_Init(void){
  GPIO_InitTypeDef  GPIO_InitStructure;
	/* LED_PORT Periph clock enable */
  RCC_AHB1PeriphClockCmd(LED_GPIO_RCC, ENABLE);
  /* Configure PD12 in output pushpull mode */
  GPIO_InitStructure.GPIO_Pin = LED1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(LED_PORT, &GPIO_InitStructure);
}
//--------------------------------------------------------------------
void Set_Reset_LED1(unsigned long Delay){
	GPIO_SetBits(LED_PORT, LED1);
	usDelay(Delay);
	GPIO_ResetBits(LED_PORT, LED1);
	usDelay(1000-Delay);
}
//--------------------------------------------------------------------
void usDelay(unsigned long usTime){
	unsigned long i,j, nCount=0x29;
	for(i=0;i < usTime;i++)
		for(j=0;j < nCount;j++);
}