#include?

//?STM32F407VGT6?or?STM32F407VET6
//?SD2405?use?I2C1
//?I2C1_SCL?->?GPIOB_Pin6
//?I2C1_SDA?->?GPIOB_Pin7

unsigned?int?tm_sec;???/*?seconds?after?the?minute?0?to?60?*/
unsigned?int?tm_min;???/*?minutes?after?the?hour?0?to?59?*/
unsigned?int?tm_hour;??/*?hours?since?midnight?0?to?23?*/
unsigned?int?tm_mday;??/*?day?of?the?month?1?to?31?*/
unsigned?int?tm_mon;???/*?months?since?January?0?to?11?*/
unsigned?int?tm_year;??/*?years?since?1900?*/
unsigned?int?tm_wday;??/*?days?since?Sunday?0?to?6?*/

/**
??*?@brief??Converts?a?2?digit?decimal?to?BCD?format.
??*?@param??Value:?Byte?to?be?converted.
??*?@retval?Converted?byte
??*/
static?uint8_t?RTC_ByteToBcd2（uint8_t?Value）
{
	uint8_t?bcdhigh?=?0;
	while?（Value?>=?10）
	{
		bcdhigh++;
		Value?-=?10;
	}
	return??（（uint8_t）（bcdhigh?<}

/**
??*?@brief??Convert?from?2?digit?BCD?to?Binary.
??*?@param??Value:?BCD?value?to?be?converted.
??*?@retval?Converted?word
??*/
static?uint8_t?RTC_Bcd2ToByte（uint8_t?Value）
{
	uint8_t?tmp?=?0;
	tmp?=?（（uint8_t）（Value?&?（uint8_t）0xF0）?>>?（uint8_t）0x4）?*?10;
	return?（tmp?+?（Value?&?（uint8_t）0x0F））;
}


/******************************************************************************
*??Set?Time
******************************************************************************/
void?SetTime（void）
{
????unsigned?char?isj[7];
	if	（		（tm_sec??<=?60）
			&&	（tm_min??			&&	（tm_hour?			&&	（tm_mday?<=?31）?&&?（tm_mday?>=?1）
			&&	（tm_mon??<=?12）?&&?（tm_mon??>=?1）
			&&	（tm_year?			&&	（tm_wday?		）
	{
		sj[0]?=?RTC_ByteToBcd2（tm_sec）;			/*?seconds?after?the?minute?0?to?60?*/
		sj[1]?=?RTC_ByteToBcd2（tm_min）;			/*?minutes?after?the?hour?0?to?59?*/
		sj[2]?=?RTC_ByteToBcd2（tm_hour）|0x80;	/*?hours?since?midnight?0?to?23?*/
		sj[4]?=?RTC_ByteToBcd2（tm_mday）;		/*?day?of?the?month?1?to?31?*/
		sj[5]?=?RTC_ByteToBcd2（tm_mon）;			/*?months?since?January?0?to?11?*/
		sj[6]?=?RTC_ByteToBcd2（tm_year）;		/*?years?since?1900?*/
		sj[3]?=?RTC_ByteToBcd2（tm_wday）;		/*?days?since?Sunday?0?to?6?*/	
		I2C_GenerateSTART（I2C1ENABLE）;
		while（!I2C_CheckEvent（I2C1I2C_EVENT_MASTER_MODE_SELECT））;
		I2C_Send7bitAddress（I2C10x65I2C_Direction_Transmitter）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED））;
		I2C_SendData（I2C10x10）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_BYTE_TRANSMITTED））;
		I2C_SendData（I2C10x80）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_BYTE_TRANSMITTED））;
		I2C_GenerateSTART（I2C1ENABLE）;
		while（!I2C_CheckEvent（I2C1I2C_EVENT_MASTER_MODE_SELECT））;
		I2C_Send7bitAddress（I2C10x65I2C_Direction_Transmitter）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED））;
		I2C_SendData（I2C10x0f）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_BYTE_TRANSMITTED））;
		I2C_SendData（I2C10x84）;
		while（!I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_BYTE_TRANSMITTED））;
		I2C_GenerateSTART（I2C1ENABLE）;