www.pudn.com > 061121_940NoOS_R2025.rar > RTC.c

#include "RTC.h" 
 
volatile UINT currentYear; 
volatile UINT currentMonth; 
volatile UINT currentDay; 
volatile UINT currentHour; 
volatile UINT currentMinute; 
volatile UINT currentSecond; 
 
 
void ReadR2025(void) 
{ 
	BYTE ReadData[4]; 
	 
	I2C_ReceiveData(RTC2025_IIC_ADDRESS_R, ReadData, 4); 
	printf("ConReg1: 0x%X",ReadData[0]); 
	printf("Second: %d",  BCDToDec(ReadData[1])); 
	printf("Minute: %d",  BCDToDec(ReadData[2])); 
	printf("Hour  : %d\n",  BCDToDec(ReadData[3])); 
} 
 
BYTE BCDToDec(BYTE bcd_number) 
{ 
	return((bcd_number>>4)*10 + (bcd_number&0x0f)); 
} 
 
BYTE DECToBCD(BYTE dec_number) 
{ 
	return(((dec_number/10)<<4) | (dec_number%10)); 
} 
 
 
 /***************************************************** 
 *   Actual RTC functions                             * 
 *****************************************************/ 
	 
/* setup RTC R2025S/D control register */	 
/* format: Write_Address, Internal_Pointer, ConReg1, ConReg2*/ 
/*  call: PowerONSetRTCReg(0x20,0x10); is OK!!!!!!!  */ 
 
void PowerONSetRTCReg(BYTE ConReg1, BYTE ConReg2) 
{ 
	BYTE WirteData[3]; 
	 
	WirteData[0] = INTERNAL_POINTER_ADDRESS; 
	WirteData[1] = ConReg1; 
	WirteData[2] = ConReg2; 
	I2C_SendDataNoStop(RTC2025_IIC_ADDRESS_W, WirteData, sizeof(WirteData)); 
} 
 
/* IIC format:Write_Address, Internal_Poniter, re-Start, Read_Address, second, minute, hour*/ 
void GetSysTime(void) 
{ 
	BYTE WirteData[1]; 
	BYTE ReadData[3]; 
	 
	WirteData[0] = READ_CUR_TIME_ADDRESS; 
	I2C_SendDataNoStop(RTC2025_IIC_ADDRESS_W, WirteData, sizeof(WirteData)); 
	I2C_ReceiveData(RTC2025_IIC_ADDRESS_R, ReadData, sizeof(ReadData)); 
 
	currentSecond = BCDToDec(ReadData[0]); 
	currentMinute = BCDToDec(ReadData[1]); 
	currentHour   = BCDToDec(ReadData[2]); 
	 
	#ifdef TO_DEBUG_CUR_TIME 
	PrintCurTime(); 
	#endif 
} 
 
#ifdef TO_DEBUG_CUR_TIME 
void PrintCurTime(void) 
{ 
	printf("H:%2d",   currentHour); 
	printf("M:%2d",   currentMinute); 
	printf("S:%2d\n", currentSecond); 
} 
 
void PrintCurDate(void) 
{ 
	printf("Y:%2d",   currentYear); 
	printf("M:%2d",   currentMonth); 
	printf("D:%2d\n", currentDay); 
} 
#endif 
 
/*  notice: entry parameters are DECIMAL */ 
void SetSysTime(UINT hours,UINT minutes,UINT seconds) 
{ 
	BYTE WirteData[4]; 
	 
	WirteData[0] = WIRTE_TIME_ADDRESS; 
	WirteData[1] = DECToBCD(seconds); 
	WirteData[2] = DECToBCD(minutes); 
	WirteData[3] = DECToBCD(hours); 
	I2C_SendDataNoStop(RTC2025_IIC_ADDRESS_W, WirteData, sizeof(WirteData)); 
} 
 
void GetSysDate(void) 
{ 
	BYTE WirteData[1]; 
	BYTE ReadData[3]; 
	 
	WirteData[0] = READ_CUR_DATE_ADDRESS; 
	I2C_SendDataNoStop(RTC2025_IIC_ADDRESS_W, WirteData, sizeof(WirteData)); 
	I2C_ReceiveData(RTC2025_IIC_ADDRESS_R, ReadData, sizeof(ReadData)); 
	 
	currentDay   = BCDToDec(ReadData[0]); 
	currentMonth = BCDToDec(ReadData[1]&0x1F); 
	currentYear  = BCDToDec(ReadData[2]); 
	 
	#ifdef TO_DEBUG_CUR_TIME 
	PrintCurDate(); 
	#endif 
} 
 
/*  notice: entry parameters are DECIMAL */ 
void SetSysDate(UINT years,UINT months,UINT days) 
{ 
	BYTE WirteData[4]; 
	 
	WirteData[0] = WIRTE_DATE_ADDRESS; 
	WirteData[1] = DECToBCD(days); 
	WirteData[2] = DECToBCD(months&0x1F); 
	WirteData[3] = DECToBCD(years); 
	I2C_SendDataNoStop(RTC2025_IIC_ADDRESS_W, WirteData, sizeof(WirteData)); 
}