pll.c

本文档用于描述一体化组合模块485监控板监控对象

#include "main.h"
#include "variable.h"
#include "stdafx.h"
#include <intrinsics.h>
#include "pll.h"
#include "spi.h"
///////////////////////////////////////
void Init_PLL()
{
  
  PORTC&=~PLL_CLK;  //PLL_CLK=0
  PORTC&=~PLL_DAT;  //PLL_CLK=0
  PORTC&=~PLL_LE;   //PLL_CLK=0
}

void PLL_routine(U32 fre)
{
	U8 j;
	U8 error;
	U32 i;

	i = fre;  
	if (i != 0)
	{
		error = 0;
		i <<= 2;
		i |= 1;
		i &= ~0x100000;
		while (error < 5)
		{
			PORTC &= ~PLL_LE;  //PLL_LE = 0;
			PLL_data(0x93);
			PORTC |= PLL_LE;  //PLL_LE = 1;
			
                        Delay(10);
                        
			PORTC &= ~PLL_LE;  //PLL_LE = 0;
			PLL_data(0x1400);
			PORTC |= PLL_LE;  //PLL_LE = 1;
                        
			Delay(10);
                        
			PORTC &= ~PLL_LE;  //PLL_LE = 0;
			PLL_data(i);			
			PORTC |= PLL_LE;  //PLL_LE = 1;
                        
			Delay(10);
                        
			PORTC &= ~PLL_LE;  //PLL_LE = 0;
                        
			for (j = 0; j < 100; j++);
                        
			if ((PINC & 0x04) == 0x04)   //check PLL lock
			{
				break;
			}
			else 
			{
				++error;
			}
		}		
	}
}


void PLL_data(U32 parament)
{
	U8 i;
	for (i = 0; i < 21; i++)
	{
		PORTC &= ~PLL_CLK;  //PLL_CLK = 0;
		if ((parament & 0x100000) == 0)
		{
			PORTC &= ~PLL_DAT;  //PLL_DAT = 0;
		}
		else 
		{
			PORTC |= PLL_DAT;  //PLL_DAT = 1;
		}
		PORTC |= PLL_CLK;  //PLL_CLK = 1;
		parament <<= 1;
	}
	PORTC &= ~PLL_CLK; //PLL_CLK = 0;
}