rtc.c

F2812的实时时钟例程

#include "DEC2812.h"
#include "DSP28_Device.h"

/*********************************************************************************************
	filename:	void init_rtc(void)
	
*********************************************************************************************/
void init_rtc(void)
{
	*IIC_SDA_DIR = 0;
	*IIC_SCL_DIR = 0;
	Set_Delay(200);
	*IIC_SCL_OUT = 0;
	Set_Delay(200);
	*IIC_SDA_OUT = 1;
	Set_Delay(200);
//	Byte_Write(0xde,0,0x11,0x08);
//	Set_Rtc(1,0x03,0x11,0x17,0x12,0x30,0x15);
}

void Set_Rtc(unsigned int date,unsigned int year,unsigned int month,unsigned int day,unsigned int hour,unsigned int minute,unsigned int second)
{
	unsigned int i;
	/*写WEL*/
	Write_WEL();
	/*写RWEL*/
	Write_RWEL();
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xde);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(0x30);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DATE*/
	Write_Rtc(second);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写YEAR*/
	Write_Rtc(minute);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写MONTH*/
	Write_Rtc(hour);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DAY*/
	Write_Rtc(day);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写HOUR*/
	Write_Rtc(month);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写MINUTE*/
	Write_Rtc(year);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写SECOND*/
	Write_Rtc(date);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写停止位*/
	Write_Stop_bit();
	Reset_Status();
}

void Set_Delay(unsigned int Delay_Num)
{
	unsigned int i;
	for(i = 0; i <= Delay_Num; i++)
	{
		NOP;
	}
}

void Write_Start_bit(void)
{
	*IIC_SDA_DIR = 0;
	*IIC_SDA_OUT = 1;
	Set_Delay(200);
	*IIC_SCL_OUT = 1;
	Set_Delay(200);
	*IIC_SDA_OUT = 0;
	Set_Delay(200);
	*IIC_SCL_OUT = 0;
	Set_Delay(200);
}

void Write_Stop_bit(void)
{
	*IIC_SDA_DIR = 0;
	*IIC_SDA_OUT = 0;
	Set_Delay(200);
	*IIC_SCL_OUT = 1;
	Set_Delay(200);
	*IIC_SDA_OUT = 1;
	Set_Delay(200);
	*IIC_SCL_OUT = 0;
	Set_Delay(200);
}

void Write_WEL(void)
{
	unsigned int i;
	*IIC_SDA_DIR = 0;
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xde);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(0x3f);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DATE*/
	Write_Rtc(0x02);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写停止位*/
	Write_Stop_bit();
	/*复位*/
//	Reset_Status();
}

void Write_RWEL(void)
{
	unsigned int i;
	*IIC_SDA_DIR = 0;
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xde);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(0x3f);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DATE*/
	Write_Rtc(0x06);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写停止位*/
	Write_Stop_bit();
}

void Reset_Status(void)
{
	unsigned int i;
	*IIC_SDA_DIR = 0;
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xde);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(0x3f);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DATE*/
	Write_Rtc(0x0);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写停止位*/
	Write_Stop_bit();
}

void Write_Rtc(unsigned int Rtc_Var)
{
	int i;
	*IIC_SDA_DIR = 0;
	for(i = 7; i >= 0; i--)
	{
		*IIC_SDA_OUT = (Rtc_Var >> i) & 1;
		Set_Delay(200);
		*IIC_SCL_OUT = 1;
		Set_Delay(200);
		*IIC_SCL_OUT = 0;
		Set_Delay(200);
	}
}

unsigned int Read_Rtc_ACK(void)
{
	unsigned int i;
	*IIC_SDA_DIR = 1;
	Set_Delay(200);
	*IIC_SCL_OUT = 1;
	Set_Delay(200);
	i = *IIC_SDA_IN;
	Set_Delay(200);
	*IIC_SCL_OUT = 0;
	Set_Delay(200);
	return(i);
}

void Write_Rtc_ACK(void)
{
	*IIC_SDA_DIR = 0;
	*IIC_SDA_OUT = 0;
	Set_Delay(200);
	*IIC_SCL_OUT = 1;
	Set_Delay(200);
	*IIC_SCL_OUT = 0;
	Set_Delay(200);
}

unsigned int Read_Rtc_Data(unsigned int slave_address1,unsigned int slave_address0,unsigned int address1,unsigned int address0)
{
	unsigned int i,j,var1[8];
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(slave_address1);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(address1);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(address0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(slave_address0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*读DATA*/
	*IIC_SDA_DIR = 1;
	j = 0;
	for(i = 0; i < 8; i++)
	{
		*IIC_SCL_OUT = 1;
		Set_Delay(200);
		var1[i] = *IIC_SDA_IN;
		j = j | (var1[i] << (7 - i));
		Set_Delay(200);
		*IIC_SCL_OUT = 0;
		Set_Delay(200);
	}
	/*写停止位*/
	Write_Stop_bit();
	return(j);
}

void Page_Read_Eeprom(unsigned int address1,unsigned int address0,unsigned int length)
{
	unsigned int i,j,k,var1[8];
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xae);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(address1);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(address0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xaf);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	*IIC_SDA_DIR = 1;
	k = 0;
	for(i = 0; i < 8; i++)
	{
		*IIC_SCL_OUT = 1;
		Set_Delay(200);
		var1[i] = *IIC_SDA_IN;
		k = k | (var1[i] << (7 - i));
		Set_Delay(200);
		*IIC_SCL_OUT = 0;
		Set_Delay(200);
	}
	RTC_ReadData[0] = k;
	/*读DATA*/
	for(j = 1; j < length; j++)
	{
		/*写ACK应答*/
		Write_Rtc_ACK();
		*IIC_SDA_DIR = 1;
		k = 0;
		for(i = 0; i < 8; i++)
		{
			*IIC_SCL_OUT = 1;
			Set_Delay(200);
			var1[i] = *IIC_SDA_IN;
			k = k | (var1[i] << (7 - i));
			Set_Delay(200);
			*IIC_SCL_OUT = 0;
			Set_Delay(200);
		}
		RTC_ReadData[j] = k;
	}
	/*写停止位*/
	Write_Stop_bit();
}

void Byte_Write(unsigned int Slave_Address,unsigned int address1,unsigned int address0,unsigned int data)
{
	unsigned int i;
		/*写WEL*/
	Write_WEL();
	/*写RWEL*/
	Write_RWEL();
	/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(Slave_Address);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(address1);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(address0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写DATE*/
	Write_Rtc(data);
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写停止位*/
	Write_Stop_bit();
}

void Byte_Write_Eeprom(unsigned int address1,unsigned address0,unsigned int data)
{
	/*写WEL*/
	Write_WEL();
	/*写RWEL*/
	Write_RWEL();
	/*写EEPROM*/
	Byte_Write(0xae,address1,address0,data);
	/*延时10MS*/
	Delay_10ms();
	/*清STATUS*/
	Reset_Status();
}

void Page_Write_Eeprom(unsigned int address1,unsigned int address0,unsigned int *data,unsigned int length)
{
	unsigned int i,j;
	/*写WEL*/
	Write_WEL();
	/*写RWEL*/
	Write_RWEL();
		/*写开始位*/
	Write_Start_bit();
	/*写SLAVE BYTE*/
	Write_Rtc(0xae);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 1*/
	Write_Rtc(address1);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	/*写WORD ADDRESS 0*/
	Write_Rtc(address0);	
	/*读ACK应答*/
	i = Read_Rtc_ACK();
	if(i == 1)
	{
		while(1);
	}
	for(j = 0; j < length; j++)
	{
		/*写DATE*/
		Write_Rtc(*(data+j));
		/*读ACK应答*/
		i = Read_Rtc_ACK();
	}
	/*写停止位*/
	Write_Stop_bit();
	/*延时10MS*/
	Delay_10ms();
	/*清STATUS*/
	Reset_Status();
}

void Delay_10ms(void)
{
	unsigned int i;
	for(i = 0; i < 10000; i++)
	{
		Set_Delay(200);
	}
}