main.c

51单片机的内存优化和中断的有用知识

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 02/05/2007
* Description        : Main program body
********************************************************************************
* History:
* 05/21/2007: V0.3
* 04/02/2007: V0.2
* 02/05/2007: V0.1
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
#include <stdio.h>

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
//#define RTCClockSource_LSI   /* Use the internal 32 KHz oscillator as RTC clock source */
#define RTCClockSource_LSE   /* Use the external 32.768 KHz oscillator as RTC clock source */
//#define RTCClockOutput_Enable  /* RTC Clock/64 is output on tamper pin(PC.13) */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
vu32 TimeDisplay = 0;


/* Private function prototypes -----------------------------------------------*/
u32 Time_Regulate(void);
void Time_Adjust(void);
void Time_Show(void);
void Time_Display(u32 TimeVar);
u8 USART_Scanf(u32 value);
extern void SetupUSART(void);
extern void SetupClock (void);
extern void SetupGPIO(void);
extern void SetupNVIC(void);
extern void SetupRTC(void);
extern int GetKey (void) ;
extern int SendChar (int ch) ;

u8  data[]="Data:05/03/2008";
u8  time[]="Time: 00:00:00"; 

/* Private functions ---------------------------------------------------------*/ 
/*******************************************************************************
* Function Name  : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
     SetupClock();
 
  /* NVIC configuration */
     SetupNVIC();

  /* Configure the GPIOs */
     SetupGPIO();
  
  /* Configure the USART1 */
     SetupUSART();
	 lcd_init  ();
     lcd_clear ();
     lcd_print ("Please Setting ");
     
	 set_cursor(0, 1);
	   lcd_print("time,Thankyou!");
  if(BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)	  //1010 0101 1010 0101
  {
    /* Backup data register value is not correct or not yet programmed (when
       the first time the program is executed) */

    printf("\r\n\n RTC not yet configured....");
   
    /* RTC Configuration */
   
      SetupRTC();

     printf("\r\n RTC configured....");
 
    /* Adjust time by values entred by the user on the hyperterminal */
    Time_Adjust();

    BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);   

  }
  else
  {
    /* Check if the Power On Reset flag is set */
    if(RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
    {
      printf("\r\n\n Power On Reset occurred....");
    }
    /* Check if the Pin Reset flag is set */
    else if(RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
    {
      printf("\r\n\n External Reset occurred....");
    }

    printf("\r\n No need to configure RTC....");    
    /* Wait for RTC registers synchronization */
    RTC_WaitForSynchro();

    /* Enable the RTC Second */  
    RTC_ITConfig(RTC_IT_SEC, ENABLE);
    /* Wait until last write operation on RTC registers has finished */
    RTC_WaitForLastTask();
  }

  /* Clear reset flags */
  RCC_ClearFlag();
  
  /* Display time in infinte loop */
  Time_Show();
 // lcd_print();
    ;

}



/*******************************************************************************
* Function Name  : Time_Regulate
* Description    : Returns the time entered by user, using Hyperterminal.
* Input          : None
* Output         : None
* Return         : Current time RTC counter value
*******************************************************************************/
u32 Time_Regulate(void)
{
  u32 Tmp_HH = 0xFF, Tmp_MM = 0xFF, Tmp_SS = 0xFF;

  printf("\r\n==============Time Settings=====================================");
  printf("\r\n  Please Set Hours");
  
  while(Tmp_HH == 0xFF)
  {
    Tmp_HH = USART_Scanf(23);
  }
  printf(":  %d", Tmp_HH); 
  printf("\r\n  Please Set Minutes");
  while(Tmp_MM == 0xFF)
  {
    Tmp_MM = USART_Scanf(59);
  }
  printf(":  %d", Tmp_MM); 
  printf("\r\n  Please Set Seconds");
  while(Tmp_SS == 0xFF)
  {
    Tmp_SS = USART_Scanf(59);
  }
  printf(":  %d", Tmp_SS); 

  /* Return the value to store in RTC counter register */
  return((Tmp_HH*3600 + Tmp_MM*60 + Tmp_SS));
}

/*******************************************************************************
* Function Name  : Time_Adjust
* Description    : Adjusts time.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void Time_Adjust(void)
{
  /* Wait until last write operation on RTC registers has finished */
  RTC_WaitForLastTask(); 
  /* Change the current time */
  RTC_SetCounter(Time_Regulate());
  /* Wait until last write operation on RTC registers has finished */
  RTC_WaitForLastTask();   
}

/*******************************************************************************
* Function Name  : Time_Display
* Description    : Displays the current time.
* Input          : - TimeVar: RTC counter value.
* Output         : None
* Return         : None
*******************************************************************************/
void Time_Display(u32 TimeVar)
{ 
  u32 THH = 0, TMM = 0, TSS = 0;
  unsigned  int i=0;

  /* Compute  hours */
  THH = TimeVar/3600;
  time[6]=THH/10+0x30;
  time[7]=THH%10+0x30;
  /* Compute minutes */
  TMM = (TimeVar % 3600)/60;
  time[9]=TMM/10+0x30;
  time[10]=TMM%10+0x30;
  /* Compute seconds */
  TSS = (TimeVar % 3600)% 60;
   time[12]=TSS/10+0x30;
  time[13]=TSS%10+0x30;
  printf("Time: %0.2d:%0.2d:%0.2d\r",THH, TMM, TSS);
 // data[1]=2+0x30;
   lcd_clear ();
   set_cursor(0, 0);
   lcd_print(data);
   set_cursor(0, 1);
  lcd_print (time);
}

/*******************************************************************************
* Function Name  : Time_Show
* Description    : Shows the current time (HH:MM:SS) on the Hyperterminal.
* Input          : None
* Output         : None
* Return         : None
******************************************************************************/
void Time_Show(void)
{
  printf("\n\r");
  
  /* Infinite loop */ 
  while(1)
  {
    /* If 1s has paased */
    if(TimeDisplay == 1)
    {    
      /* Display current time */
      Time_Display(RTC_GetCounter());
      TimeDisplay = 0;
    }
  }
}




/*******************************************************************************
* Function Name  : fputc
* Description    : Retargets the C library printf function to the USART.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int fputc(int ch, FILE *f)
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
  USART_SendData(USART1, (u8) ch);

  /* Loop until the end of transmission */
  while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  {
  }

  return ch;
}

/*******************************************************************************
* Function Name  : USART_Scanf
* Description    : Gets numeric values from the hyperterminal.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
u8 USART_Scanf(u32 value)
{
  u32 index = 0;
  u32 tmp[2] = {0, 0};     
  
  while(index < 2)
  {
    /* Loop until RXNE = 1 */
    while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
    {
    }
    tmp[index++] = (USART_ReceiveData(USART1));
    if((tmp[index - 1] < 0x30) || (tmp[index - 1] > 0x39))
    {
      printf("\n\rPlease enter valid number between 0 and 9");
      index--;
    }
//	else 
//	  printf("\n\rPlease enter the second of Xh");
  }
  /* Calculate the Corresponding value */
  index = (tmp[1] - 0x30) + ((tmp[0] - 0x30) * 10); 
  /* Checks */
  if(index > value)
  {
    printf("\n\rPlease enter valid number between 0 and %d", value);
    return 0xFF;
  }
  return index;
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert error line source number
* Output         : None
* Return         : None
*******************************************************************************/
void assert_failed(u8* file, u32 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 2007 STMicroelectronics *****END OF FILE****/