global.c

tea5767_102模块,i2c总线控制方式

//global.c
#include "global.h"
#include "i2c.h"
//#include "main.h"
#include <reg52.h>
#include <intrins.h>

void delay_us(unsigned int i)
{
  int j ;
  for (j = 0; j<i; j++)
  {
      _nop_();
  }
}

void delay_ms(unsigned int i)
{
  int j;
  for (j=0;j<i;j++)
      delay_us(1024);
}


void Save_Freq(unsigned long Freq)
{
  unsigned char tmp,tmp1;
  Freq /= 100;
  tmp = (Freq/1000)%10;
  tmp1 = tmp<<4;
  
  tmp = (Freq/100)%10;
  tmp1 |= (tmp&0x0F);
  
  EEPROM_write( 1,tmp1 );

  tmp = (Freq/10)%10;
  tmp1 = tmp<<4;
  
  tmp = Freq%10;
  tmp1 |= (tmp&0x0F);
  
  EEPROM_write( 0,tmp1 );

}

unsigned long Load_Freq(void)
{
  unsigned long f;
  unsigned char tmp;

  tmp = EEPROM_read( 1 );

  f = (tmp & 0x0F)*100;
  tmp = (tmp >>4)&0x0F;
  f += tmp*1000;
  
  tmp = EEPROM_read( 0 );

  f += tmp & 0x0F;
  tmp = (tmp >>4)&0x0F;
  f += tmp*10;
  
  return f*100;

}

void stopInterupt()
{
	EA = 0;
	TR0 = 0;
}

void startInterupt()
{
	EA = 1;
	TR0 = 1;
}