/****************************************************************************
*   Copyright: (C)2014 Î人ÁèÔÆǶÈëʽʵÑéÊÒ www.emblinux.com
*      Author:  GuoWenxue<guowenxue@gmail.com> QQ: 281143292
* Description: ±¾Àý³ÌÔڷܶ·STM32 V5¿ª·¢°åÉϵ÷ͨ¹ý; LED1-PB5  LED2-PD6 LED3-PD3
* 
*   ChangeLog:
*        °æ±¾ºÅ     ÈÕÆÚ       ×÷Õß      ˵Ã÷
*        V1.0.0  2014.08.22  GuoWenxue   ·¢²¼¸Ã°æ±¾
****************************************************************************/

#include"stm32f10x.h"

#define ON           1
#define OFF          0

#define DELAY_TIME   0x3FFFFF

enum 
{
  LED1 = 0,
	LED2,
	LED3,
	MAX_LED,
};

typedef struct led_gpio_s
{
	int                 num;    /* LED񅧏 */
	GPIO_TypeDef        *group; /* LEDʹÓõÄGPIOÔÚÄÄÒ»×é: GPIOB or GPIOD */	
  uint16_t            pin;    /* LEDʹÓõÄGPIO×éÖеÄÄÇÒ»¸öpin: GPIO_Pin_x */
} led_gpio_t;


led_gpio_t        leds_gpio[MAX_LED] =
{
		{LED1, GPIOB, GPIO_Pin_5}, /* LED1 ÓõÄGPB5 */
		{LED2, GPIOD, GPIO_Pin_6}, /* LED2 ÓõÄGPD6 */
		{LED3, GPIOD, GPIO_Pin_3}, /* LED3 ÓõÄGPD3 */		
};


void init_led_gpio(void)
{
	int                i;
	GPIO_InitTypeDef   GPIO_InitStructure;

	/* ʹÄÜPBºÍPD×é GPIOµÄʱÖÓ */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOD , ENABLE);	
	
	/*ÉèÖà PB5(LED1), PD6(LED2), PD3(LED3)Ϊ GPIO Êä³öÍÆÃâģʽ£¬¿ÚÏß·­×ªËÙ¶ÈΪ50MHz */
	for(i=0; i<MAX_LED; i++)
	{
		/*ÉèÖà PB5(LED1)Ϊ GPIO Êä³öÍÆÃâģʽ£¬¿ÚÏß·­×ªËÙ¶ÈΪ50MHz */
		GPIO_InitStructure.GPIO_Pin = leds_gpio[i].pin;				     
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
		GPIO_Init(leds_gpio[i].group, &GPIO_InitStructure);						
  }
}

void turn_led(int which, int cmd)
{
   if(which<0 || which> MAX_LED )
		 return;
	 
	 if(OFF == cmd)
		 GPIO_ResetBits(leds_gpio[which].group, leds_gpio[which].pin);
	 else
		 GPIO_SetBits(leds_gpio[which].group, leds_gpio[which].pin);
}

void Delay(__IO uint32_t nCount)
{
   for(; nCount != 0; nCount--) ;
}

int main(void)
{
	/* ³õʼ»¯ÏµÍ³Ê±ÖÓ */
  SystemInit();
	
	/* ³õʼ»¯¸÷¸öLEDµÄGPIO¹Ü½Å */
	init_led_gpio();

  while(1)
  {
		  /* °ÑLED1µãÁÁ£¬ LED2ºÍLED3Ãðµô */
			turn_led(LED1, ON);
		  turn_led(LED2, OFF);
			turn_led(LED3, OFF);
		  Delay(DELAY_TIME);

		  /* °ÑLED2µãÁÁ£¬ LED1ºÍLED3Ãðµô */		
			turn_led(LED2, ON);
		  turn_led(LED1, OFF);
			turn_led(LED3, OFF);
		  Delay(DELAY_TIME);

		  /* °ÑLED3µãÁÁ£¬ LED1ºÍLED2Ãðµô */		
			turn_led(LED3, ON);
		  turn_led(LED2, OFF);
			turn_led(LED1, OFF);
		  Delay(DELAY_TIME);
  }
}