main.c

STM32 库文件

/**
  ******************************************************************************
  * @file SysTick/main.c 
  * @author  MCD Application Team
  * @version  V3.0.0
  * @date  04/06/2009
  * @brief  Main program body.
  ******************************************************************************
  * @copy
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  */ 

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "platform_config.h"

/** @addtogroup StdPeriph_Examples
  * @{
  */

/** @addtogroup SysTick
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;
static __IO uint32_t TimingDelay;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void Delay(__IO uint32_t nTime);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval : None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();

  /* Configure GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 as Output push-pull ----*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIO_LED, &GPIO_InitStructure);

  /* Turn on Leds connected to GPIO_LED Pin 6 and Pin 8 */
  GPIO_Write(GPIO_LED, GPIO_Pin_6 | GPIO_Pin_8);

  /* Setup SysTick Timer for 1 msec interrupts  */
  if (SysTick_Config(SystemFrequency / 1000))
  { 
    /* Capture error */ 
    while (1);
  }

  while (1)
  {
    /* Toggle leds connected to GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 */
    GPIO_Write(GPIO_LED, (uint16_t)~GPIO_ReadOutputData(GPIO_LED));

    /* Insert 500 ms delay */
    Delay(500);

    /* Toggle leds connected to GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 */
    GPIO_Write(GPIO_LED, (uint16_t)~GPIO_ReadOutputData(GPIO_LED));

    /* Insert 300 ms delay */
    Delay(300);
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{   
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();

  /* Enable GPIO_LED clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_LED, ENABLE);
}

/**
  * @brief  Inserts a delay time.
  * @param nTime: specifies the delay time length, in milliseconds.
  * @retval : None
  */
void Delay(__IO uint32_t nTime)
{ 
  TimingDelay = nTime;

  while(TimingDelay != 0);
}

/**
  * @brief  Decrements the TimingDelay variable.
  * @param  None
  * @retval : None
  */
void TimingDelay_Decrement(void)
{
  if (TimingDelay != 0x00)
  { 
    TimingDelay--;
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param file: pointer to the source file name
  * @param line: assert_param error line source number
  * @retval : None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */

/**
  * @}
  */

/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/