传真(Fax)编程

开发平台：
C/C++

FaxFrontPointerManage.c：源码内容
							/***************************************
Program:     FlashManage
Author:      Bryan Cai
Date:        2006.12.12
***************************************/
#include "includeH.h"
void WriteFaxFrontPointerTable(void)
{
	
	unsigned char ucFlashSttsOverflowCnt=0,ucFaxPointerLenCnt=0,
	              ucRxIndex=0;
	
		  COMMAND_VAL=cFlashWriteCmd;
		  COMMAND_LATCH_INTO();
//ADDRESS		
		  
		  ADDRESS_VALUE=gwColumnAddress & 0xff;//COLUMN_ADDRESS_LOW;					
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=(gwColumnAddress>>8) & 0XFF;//COLUMN_ADDRESS_HIGH;	
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=gwFrontPointerAddress & 0xff;			
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=(gwFrontPointerAddress>>8) & 0XFF;		
		  ADDRESS_LATCH_INTO();
		  FLASH_CON_PORT_OUT &=~ ALE;
		
		  DATA_PORT_OUT_INITIAL;
		  for (ucFaxPointerLenCnt=0;ucFaxPointerLenCnt<4;ucFaxPointerLenCnt++)
		  {
			  FLASH_CON_PORT_OUT&=~WE;
		    DATA_PORT_OUT=aucUartRxBuf[ucRxIndex++];
		    FLASH_CON_PORT_OUT |= WE;	
		  }
		
		  COMMAND_VAL=cFlashWriteInitiateCmd;				//10H INITIATES PROGRAM
		  COMMAND_LATCH_INTO();
		
		  READ_STATUS();
		  ucFlashSttsOverflowCnt=0;
		  if(FLASH_STATUS==1&&(ucFlashSttsOverflowCnt++)<2)
			  {;}
}
void ReadLastFaxFrontPointer(void)//find last fax front pointer
{
	unsigned int wPageAddress=0, wBlockAddress=0,
	             wColumnAddress=0,wNextPageAddress=0,
	             wRearPntCnt=0;
	unsigned char ucRxIndex=0,
	              ucRxIndex3=0,ucRxIndex2=0,
	              ucRxIndex0=0,ucRxIndex1=0,
	              ucGeneralCnt=0,ucFaxRearLenCnt;
	
  for (wBlockAddress=cFaxFrontPointerTableStartBlockNum;
	     wBlockAddress<=cFaxFrontPointerTableOverBlockNum;wBlockAddress++)
	{
		
		for (wPageAddress=(wBlockAddress<<6);wPageAddress<((wBlockAddress<<6)+64);wPageAddress++)
		{
      do{
	    wNextPageAddress=wPageAddress+64;
	    wPageAddress=CalNextPageAddress(wPageAddress);
      }while(wNextPageAddress==wPageAddress);
      
      wColumnAddress=0;
      ROW_ADDRESS_LOW=wPageAddress & 0XFF;
      ROW_ADDRESS_HIGH=(wPageAddress>>8) & 0XFF;
      
      for (ucGeneralCnt=0;ucGeneralCnt<8;ucGeneralCnt++)
      {
//COMMAND
		  COMMAND_VAL=0x00;			//#0X00					//00H READ1 0-2111BYTE
		  COMMAND_LATCH_INTO();
//ADDRESS		
		  ADDRESS_VALUE=wColumnAddress & 0xff;//COLUMN_ADDRESS_LOW;					
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=(wColumnAddress>>8) & 0XFF;//COLUMN_ADDRESS_HIGH;	
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=ROW_ADDRESS_LOW;			
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=ROW_ADDRESS_HIGH;		
		  ADDRESS_LATCH_INTO();
		  FLASH_CON_PORT_OUT &=~ ALE;
		
		  COMMAND_VAL=0X30;
		  COMMAND_LATCH_INTO();
		  //ATcmdDelay();
		  while((FLASH_CON_PORT_IN & RB)==0);
		  DATA_PORT_IN_INITIAL;
		  for (ucFaxRearLenCnt=0;ucFaxRearLenCnt<4;ucFaxRearLenCnt++)
		  {
		    FLASH_CON_PORT_OUT &=~ RE;				//RE IS LOW,ENABLE READ DATA
		    aucUartRxBuf[ucRxIndex++]=DATA_PORT_IN;
		    FLASH_CON_PORT_OUT |= RE;
		  }
		  wRearPntCnt++;
	    
	    ucRxIndex3=ucRxIndex-4;
            ucRxIndex2=ucRxIndex-3;
            ucRxIndex1=ucRxIndex-2;
            ucRxIndex0=ucRxIndex-1;
	    if (0xff == aucUartRxBuf[ucRxIndex0] && 0xff == aucUartRxBuf[ucRxIndex1] &&
	    	  0xff == aucUartRxBuf[ucRxIndex2] && 0xff == aucUartRxBuf[ucRxIndex3])
	    	{
	    		break;	 //next front   	
	    	}//if
	  if (ucGeneralCnt<4)
		 wColumnAddress+=512;
          else
		 wColumnAddress+=16;
	  }//for read next front pointer
	   
	    if (0xff == aucUartRxBuf[ucRxIndex0] && 0xff == aucUartRxBuf[ucRxIndex1] &&
	    	  0xff == aucUartRxBuf[ucRxIndex2] && 0xff == aucUartRxBuf[ucRxIndex3])
	    	{break;}
	  }//for next page
	    
	    if (0xff == aucUartRxBuf[ucRxIndex0] && 0xff == aucUartRxBuf[ucRxIndex1] &&
	    	  0xff == aucUartRxBuf[ucRxIndex2] && 0xff == aucUartRxBuf[ucRxIndex3])
	    	{break;}
	}//for next block
	gwFrontPointerAddress=wPageAddress; //for write Fax front pointer
  gwColumnAddress=wColumnAddress; //read next front pointer address, for write next front pointer
  if (wRearPntCnt>1)
  {
    ucRxIndex1=ucRxIndex-8;
    ucRxIndex0=ucRxIndex-7;
    wPageAddress=aucUartRxBuf[ucRxIndex0];
    gwPageAddress=(wPageAddress<<8) | aucUartRxBuf[ucRxIndex1]; 
  }
  else
    gwPageAddress=cstFaxContentStartPage-1;//2559;//1279;//read data start address(1280)
}

						