timechip.c

PWM输出控制三路步进电机

#include "timechip.h"

void delay_us(unsigned char a)
{
	unsigned char b;
	for(b=a;b>0;b--)
	{
		asm("nop");
	}	
}
void Start(void)
{	
	DIR_IN;	
	asm("nop");
	SDA_0;	
	asm("nop");
	SCL_1;
	asm("nop");
	delay_us(0x20);
	//delay_us(0xc);	
	DIR_OUT;
	asm("nop");
	delay_us(0xc);
	SCL_0;	
	delay_us(0xc);
}
void Stop(void)
{	
	DIR_OUT;
	asm("nop");
	delay_us(0xc);
	SCL_1; 
	delay_us(0xc);	
	DIR_IN;
	delay_us(0xc);
}
void SendAck(void)
{	
	DIR_OUT;
	delay_us(0xc);
	SCL_1;		
	delay_us(0xc);
	SCL_0;		
	delay_us(0xc);	
	DIR_IN;
}

void SendNoAck(void)
{	
	DIR_IN;
	delay_us(0x23);
	SCL_1;				
	delay_us(0x23);
	SCL_0;				
	delay_us(0x23);
}

unsigned char RxByte(void)
{
	unsigned char a,b;	
	DIR_IN;					// 置 SDA 为输入
	for(a=8;a>0;a--)
	{
		b <<= 1;		
		SCL_1;
		delay_us(0x0c);		
		if(SDA_IN)
			b |= 0x01;
		else 
			b &= 0xfe;
		SCL_0;
		delay_us(0xc);
	}
	return b;
}

unsigned char TxByte(unsigned char a)
{
	unsigned char b;
	for(b=8;b>0;b--)
	{
		if(a&0x80)
		{ 
			asm("nop");
			DIR_IN; 	// 置方向为输入,外面为 1
		}
		else 
		{
			asm("nop");
			DIR_OUT; 	// 置方向为输出,输出0
		}
		delay_us(0xc);
		SCL_1;		
		delay_us(0xc);
		SCL_0;		
		a <<= 1;
		asm("nop");
	}	
	asm("nop");
	DIR_IN;
	delay_us(0xc);
	SCL_1;	
	delay_us(0xc);
	if(SDA_IN) 
	{
		b = 0xff;
	}
	else
	{
		b = 0;
	}
	SCL_0;		
	delay_us(0x04);
	return b;
}

void init5372(void)
{
	Start();
	TxByte(0x64);
	TxByte(0x70);
	TxByte(0);	
	TxByte(0);
	TxByte(0);
	TxByte(0);
	TxByte(0);
	TxByte(0);
	TxByte(0);
	TxByte(0);
	TxByte(0x28);
	Stop();
	delay_us(50);	
}

void Read5372(void)
{
	//RTC temp1;
	uint8_t i;
	Error_C_1;
	if(Rd_Over | Rd_Read | ET_5372_Se)
	{
		asm("nop");
		return;
	}
	ET_5372_Se_1;	
	if(Tx_Len)
	{
		asm("nop");
		return;
	}
	asm("nop");
	Start();
	TxByte(0x64);
	TxByte(0x04);
	for(i=0; i<7;i++)
	{
		asm("nop");
		TIME_RTC_BK[i]=TIME_RTC[i];
	}
	
	TIME_RTC[0] = RxByte(); //rtc.sec = RxByte();
	SendAck();
	
	TIME_RTC[1] = RxByte(); //rtc.minute = RxByte();
	SendAck();

	TIME_RTC[2] = RxByte(); //rtc.hour = RxByte();
	SendAck();
	
	TIME_RTC[3] = RxByte(); //rtc.week = RxByte();
	SendAck();
	
	TIME_RTC[4] = RxByte(); //rtc.day = RxByte();
	SendAck();

	TIME_RTC[5] = RxByte(); //rtc.month = RxByte();
	SendAck();

	TIME_RTC[6] = RxByte(); //rtc.year = RxByte();
//	SendAck();
//	Time_Error =  RxByte(); //error
	SendNoAck();
	Stop();
}

void Read5372A(void)
{
	//RTC temp1;
	uint8_t i;
	Error_C_1;
	if(Rd_Over | Rd_Read | ET_5372_Se)
	{
		return;
	}
	ET_5372_Se_1;	
	if(Tx_Len)
	{
		return;
	}
	Start();
	TxByte(0x64);
	TxByte(0x04);
	for(i=0; i<7;i++)
	{
		TIME_RTC_BK[i]=TIME_RTC[i];
	}
	TIME_RTC[0] = RxByte(); //rtc.sec = RxByte();
	SendAck();
	
	TIME_RTC[1] = RxByte(); //rtc.minute = RxByte();
	SendAck();

	TIME_RTC[2] = RxByte(); //rtc.hour = RxByte();
	SendAck();
	
	TIME_RTC[3] = RxByte(); //rtc.week = RxByte();
	SendAck();
	
	TIME_RTC[4] = RxByte(); //rtc.day = RxByte();
	SendAck();

	TIME_RTC[5] = RxByte(); //rtc.month = RxByte();
	SendAck();

	TIME_RTC[6] = RxByte(); //rtc.year = RxByte();
	SendAck();
	Time_Error =  RxByte(); //error
	SendNoAck();
	Stop();
}
uint8_t show816_H(uint8_t u)
{
	uint8_t b,x;	
	x= (u >>4) &0x0f;
	if(x >9)
		b = x + 0x37;	
	else
		b = x + 0x30;
	return(b);
}
uint8_t show816_L(uint8_t u)
{
	uint8_t b,x;
	x = u & 0x0f;		
	if( x >9)
		b = x +0x37;	
	else
		b = x +0x30;
	return(b);
}

void Write5372(void)
{
//	unsigned char a;
	Start();
	TxByte(0x64);
	asm("nop");
	TxByte(0x00);
	asm("nop");
	TxByte(TIME_TMP[0]);	//sec
	asm("nop");
	TxByte(TIME_TMP[1]);	//min
	asm("nop");
	TxByte(TIME_TMP[2]);	//h 
	asm("nop");
	TxByte(TIME_TMP[3]);	//w
	asm("nop");
	TxByte(TIME_TMP[4]);	//d
	asm("nop");
	TxByte(TIME_TMP[5]);	//m
	asm("nop");
	//TIME_TMP[6]=8;
	TxByte(TIME_TMP[6]);	//year
	asm("nop");
//	TxByte(Time_Error);	//year
	Stop();
	asm("nop");
//	delay_us(70);
}
void Write5372A(void)
{
//	unsigned char a;
	Start();
	asm("nop");
	TxByte(0x64);
	asm("nop");
	TxByte(0x00);
	asm("nop");
	TxByte(TIME_TMP[0]);	//sec
	asm("nop");
	TxByte(TIME_TMP[1]);	//min
	asm("nop");
	TxByte(TIME_TMP[2]);	//h 
	asm("nop");
	TxByte(TIME_TMP[3]);	//w
	asm("nop");
	TxByte(TIME_TMP[4]);	//d
	asm("nop");
	TxByte(TIME_TMP[5]);	//m
	//TIME_TMP[6]=8;
	TxByte(TIME_TMP[6]);	//year
	asm("nop");
	TxByte(Time_Error);	//year
	asm("nop");
	Stop();
	asm("nop");
	//delay_us(70);
}