STM32 万年历 显示年月日 时分秒 星期

基于STM32处理器 的RTC只是个能靠电池保持运行的32位定时器！ 并不像实时时钟芯片，读起来就是年月日时分秒。

此程序 第一次运行之后 从超级终端 输入时间

关键代码

本文引用地址：

/*******************************************************************************

* Function Name : Time_Regulate

* Description : Returns the time entered by user, using Hyperterminal.

* Input : None

* Output : None

* Return : Current time RTC counter value

*******************************************************************************/

//u32 Month_Days[13] = {0,31,28,31,30, 31, 30, 31, 31, 30, 31, 30, 31};

u32 Month_Days_Accu_C[13] = {0,31,59,90,120,151,181,212,243,273,304,334,365};

u32 Month_Days_Accu_L[13] = {0,31,60,91,121,152,182,213,244,274,305,335,366};

#define SecsPerDay (3600*24)

u32 Time_Regulate(void)

{

#if 1

u32 Tmp_Year=0xFFFF, Tmp_Month=0xFF, Tmp_Date=0xFF;

u32 LeapY, ComY, TotSeconds, TotDays;

#endif

u32 Tmp_HH = 0xFF, Tmp_MM = 0xFF, Tmp_SS = 0xFF;

printf("\r\n==============Time Settings=====================================");

#if 1

printf("\r\n Please Set Year");

while(Tmp_Year == 0xFFFF)

{

/*32-bit counter at Second Unit--> 4*1024*1024(s) --> 49710(day) --> 136(year)*/

Tmp_Year = USART_Scanf(2136);

}

//Tmp_Year=2010;

printf(": %d", Tmp_Year);

printf("\r\n Please Set Month");

while(Tmp_Month == 0xFF)

{

Tmp_Month = USART_Scanf(12);

}

printf(": %d", Tmp_Month);

printf("\r\n Please Set Date");

while(Tmp_Date == 0xFF)

{

Tmp_Date = USART_Scanf(31);

}

printf(": %d", Tmp_Date);

#endif

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);

#if 1

{

/* change Year-Month-Data-Hour-Minute-Seconds into X(Second) to set RTC->CNTR */

if(Tmp_Year==2000)

LeapY = 0;

else

LeapY = (Tmp_Year - 2000 -1)/4 +1;

ComY = (Tmp_Year - 2000)-(LeapY);

if (Tmp_Year%4)

//common year

TotDays = LeapY*366 + ComY*365 + Month_Days_Accu_C[Tmp_Month-1] + (Tmp_Date-1);

else

//leap year

TotDays = LeapY*366 + ComY*365 + Month_Days_Accu_L[Tmp_Month-1] + (Tmp_Date-1);

TotSeconds = TotDays*SecsPerDay + (Tmp_HH*3600 + Tmp_MM*60 + Tmp_SS);

}

#endif

/* Return the value to store in RTC counter register */

//return((Tmp_HH*3600 + Tmp_MM*60 + Tmp_SS));

return TotSeconds;

}

===============================================

/**

* @brief Displays the current time.

* @param TimeVar: RTC counter value.

* @retval None

*/

#define SecsPerComYear 3153600//(365*3600*24)

#define SecsPerLeapYear 31622400//(366*3600*24)

#define SecsPerFourYear 126230400//((365*3600*24)*3+(366*3600*24))

#define SecsPerDay (3600*24)

s32 Year_Secs_Accu[5]={0,

31622400,

63158400,

94694400,

126230400};

s32 Month_Secs_Accu_C[13] = { 0,

2678400,

5097600,

7776000,

10368000,

13046400,

15638400,

18316800,

20995200,

23587200,

26265600,

28857600,

31536000};

s32 Month_Secs_Accu_L[13] = {0,

2678400,

5184000,

7862400,

10454400,

13132800,

15724800,

18403200,

21081600,

23673600,

26352000,

28944000,

31622400};

void Time_Display(uint32_t TimeVar)

{

#if 0

uint32_t THH = 0, TMM = 0, TSS = 0;

/* Compute hours */

THH = TimeVar / 3600;

/* Compute minutes */

TMM = (TimeVar % 3600) / 60;

/* Compute seconds */

TSS = (TimeVar % 3600) % 60;

printf("Time: %0.2d:%0.2d:%0.2d\r", THH, TMM, TSS);

#endif

//----------------------------------------------

#if 1

u32 TY = 0, TM = 1, TD = 0;

s32 Num4Y,NumY, OffSec, Off4Y = 0;

u32 i;

//s32 NumDay, OffDay;

s32 NumDay;

#endif

u32 THH = 0, TMM = 0, TSS = 0;

#if 0

/* Compute hours */

THH = TimeVar/3600;

/* Compute minutes */

TMM = (TimeVar % 3600)/60;

/* Compute seconds */

TSS = (TimeVar % 3600)% 60;

#endif

#if 1

{

Num4Y = TimeVar/SecsPerFourYear;

OffSec = TimeVar%SecsPerFourYear;

i=1;

while(OffSec > Year_Secs_Accu[i++])

Off4Y++;

/* Numer of Complete Year */

NumY = Num4Y*4 + Off4Y;

/* 2000,2001,...~2000+NumY-1 complete year before, so this year is 2000+NumY*/

TY = 2000+NumY;

OffSec = OffSec - Year_Secs_Accu[i-2];

/* Month (TBD with OffSec)*/

i=0;

if(TY%4)

{// common year

while(OffSec > Month_Secs_Accu_C[i++]);

TM = i-1;

OffSec = OffSec - Month_Secs_Accu_C[i-2];

}

else

{// leap year

while(OffSec > Month_Secs_Accu_L[i++]);

TM = i-1;

OffSec = OffSec - Month_Secs_Accu_L[i-2];

}

/* Date (TBD with OffSec) */

NumDay = OffSec/SecsPerDay;

OffSec = OffSec%SecsPerDay;

TD = NumDay+1;

/* Compute hours */

THH = OffSec/3600;

/* Compute minutes */

TMM = (OffSec % 3600)/60;

/* Compute seconds */

TSS = (OffSec % 3600)% 60;

}

#endif

printf("Date: %0.4d-%0.2d-%0.2d Time: %0.2d:%0.2d:%0.2d\r",TY, TM, TD,THH, TMM, TSS);

//----------------------------------------------------

}

===========================================

/**

* @brief Gets numeric values from the hyperterminal.

* @param None

* @retval None

*/

//注意返回值一定不能是 uint8_t

uint32_t USART_Scanf(uint32_t value)

{

u32 index = 0;

u32 tmp[4] = {0, 0};

u32 Num;

if (value==2136)

Num = 4;

else

Num = 2;

while(index

{

/* Loop until RXNE = 1 */

while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)

{

}

tmp[index++] = (USART_ReceiveData(USART1));

if((tmp[index - 1] 0x39))

{

printf("\n\rPlease enter valid number between 0 and 9");

index--;

}

}

/* Calculate the Corresponding value */

if (value!=2136)

index = ((tmp[0] - 0x30) * 10) + (tmp[1] - 0x30);

else

index = ((tmp[0] - 0x30) * 1000) + ((tmp[1] - 0x30) * 100) + ((tmp[2] - 0x30) * 10) + (tmp[3] - 0x30);

/* Checks */

if(index > value)

{

printf("\n\rPlease enter valid number between 0 and %d", value);

return 0xFF;

}

return index;

}

=============

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