复件 ds1302.c

ds1302.rar驱动程序,已经通过测试.

*/



//#include "type.h"
//#include "fat.h"
//#include "list.h"
//#include "oriole.h"
#include "type.h"
#include "gpio.h"
#include "ds1302.h"
#include <intrins.h>  //_nop_();
//extern SYSTEM_INFO xdata gSystem;



extern GPIO volatile xdata *gGpio;

#define	REG_RTC_PORT_OUT	gGpio->PortA.rGPIO_OUT
#define	REG_RTC_PORT_IN		gGpio->PortA.rGPIO_IN
#define	CTRL_RTC_PORT		gGpio->PortA.rGPIO_OE
#define MASK_RTC_RST  		0x40
#define MASK_RTC_CLK  		0x10
#define MASK_RTC_DAT  		0x20

#define SET_REG(reg, mask)		(reg |= mask)
#define	CLEAR_REG(reg, mask)	(reg &= (~mask))
#define	GET_REG(reg, mask)		(reg & mask)








static void RTCInputByte(unsigned char ucDa)
{ 
	unsigned char  i;

	for(i = 0; i < 8; ++i)
	{		
		if (ucDa & 0x01)
		{
	         SET_REG(REG_RTC_PORT_OUT, MASK_RTC_DAT);
		}
	 	else
		{
		     CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_DAT);
		}
		CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
		SET_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);

		ucDa >>= 1; 
    } 
}

static unsigned char RTCOutputByte(void) 
{ 
	unsigned char  	i;
	unsigned char 	Dat = 0;

	CLEAR_REG(CTRL_RTC_PORT, MASK_RTC_DAT);

	for(i = 0; i < 8; ++i)
    {
		Dat >>= 1;
		SET_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
		CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);

		if (GET_REG(REG_RTC_PORT_IN, MASK_RTC_DAT))
		{
			Dat |= 0x80;
		}
    } 
	SET_REG(CTRL_RTC_PORT, MASK_RTC_DAT);
    return Dat; 
}


void RTC_W1302(unsigned char  ucAddr, unsigned char  ucDa)
{


	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
	SET_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);

	RTCInputByte(ucAddr); 
    RTCInputByte(ucDa); 

	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
} 

unsigned char RTC_R1302(unsigned char  ucAddr)
{
	unsigned char  ucDa;


	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
	SET_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);

	RTCInputByte(ucAddr); 
    ucDa = RTCOutputByte(); 

	SET_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);

    return ucDa;
}


void RTC_BurstR1302T(unsigned char  *pSecDa)
{
	unsigned char  i;

	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
	SET_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
	RTCInputByte(0xbf); 

	for (i = 0; i < 8; ++i) 
	{
	  	do
		{
	      	*pSecDa = RTCOutputByte(); 
		}
		while(*pSecDa == 0xff);
	   	pSecDa++;
	}

	SET_REG(REG_RTC_PORT_OUT, MASK_RTC_CLK);
	CLEAR_REG(REG_RTC_PORT_OUT, MASK_RTC_RST);
}

/*
void RTC_BurstW1302R(unsigned char *pReDa)
{
	unsigned char  i;
	RTC_W1302(0x8e, 0x00); 
	gGpio->PortA.rGPIO_OUT &= (~MASK_RTC_RST);	//DS_RST = 0;
    gGpio->PortA.rGPIO_OUT &= (~MASK_RTC_CLK);	//DS_CLK = 0;
    gGpio->PortA.rGPIO_OUT |=  MASK_RTC_RST; 		//DS_RST = 1;
    RTCInputByte(0xfe); 
	for (i = 0; i < 31; ++i) 
	{
		RTCInputByte(*pReDa); 
	    pReDa++;
    }
    gGpio->PortA.rGPIO_OUT |= MASK_RTC_CLK;     //DS_CLK = 1;
    gGpio->PortA.rGPIO_OUT &= (~MASK_RTC_RST);  //DS_RST =0;
    RTC_W1302(0x8e, 0x80); 
} 
*/


void InitDS1302(void)
{
  	SET_REG(CTRL_RTC_PORT, (MASK_RTC_RST | MASK_RTC_CLK | MASK_RTC_DAT));
}


/*
void SaveWord(unsigned char addr, unsigned int val)
{
	unsigned char 	temp;

	RTC_W1302(0x8e, 0);				//disable wp
	temp = (unsigned char)val;
	RTC_W1302(addr, temp);
	temp = (unsigned char)(val >> 8);
	RTC_W1302((addr + 2), temp);
	RTC_W1302(0x8e, 0x80);			//enable wp
}

unsigned int LoadWord(unsigned char addr)
{
	unsigned int 	val = 0;

	val = RTC_R1302(addr + 2);
	val <<= 8;
	val += RTC_R1302(addr);

	return val;
}
*/