传真(Fax)编程

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C/C++

FlashMemoryAreaRW.c：源码内容
							/***************************************
Program:     FlashManage
Author:      Bryan Cai
Date:        2006.12.07
***************************************/
#include "includeH.h"
//unsigned int  gwGeneralPageAddress=0;//=960;
void Write16Bytes2FlashMemoryArea(void)
{
	
	unsigned char ucFlashSttsOverflowCnt=0,ucFaxGeneralLenCnt=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=gwGeneralPageAddress & 0xff;			
		  ADDRESS_LATCH_INTO();
		
		  ADDRESS_VALUE=(gwGeneralPageAddress>>8) & 0XFF;		
		  ADDRESS_LATCH_INTO();
		  FLASH_CON_PORT_OUT &=~ ALE;
		
		  DATA_PORT_OUT_INITIAL;
		  for (ucFaxGeneralLenCnt=0;ucFaxGeneralLenCnt<16;ucFaxGeneralLenCnt++)
		  {
			  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 ReadLast16BytesFromFlashMemoryArea(unsigned char ucAreaStartBlockAddress, unsigned char ucAreaOverBlockAddress)//read last fax General pointer
{
	unsigned int wPageAddress=0, wBlockAddress=0,
	             wColumnAddress=0,wNextPageAddress=0,
	             wGeneralPntCnt=0;
	unsigned char ucRxIndex=0,
	              ucRxIndex3=0,ucRxIndex2=0,
	              ucRxIndex0=0,ucRxIndex1=0,
	              ucGeneralCnt=0,ucFaxGeneralLenCnt;
	
  //for (wBlockAddress=cFaxRearPointerTableStartBlockNum;
	     //wBlockAddress<=cFaxRearPointerTableOverBlockNum;wBlockAddress++)
	for (wBlockAddress=ucAreaStartBlockAddress;
	     wBlockAddress<=ucAreaOverBlockAddress;wBlockAddress++)
	{
		
		for (wPageAddress=(wBlockAddress<<6);wPageAddress<((wBlockAddress<<6)+64);wPageAddress++)//one block
		{
      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 (ucFaxGeneralLenCnt=0;ucFaxGeneralLenCnt<16;ucFaxGeneralLenCnt++)
		  {
		    FLASH_CON_PORT_OUT &=~ RE;				//RE IS LOW,ENABLE READ DATA
		    aucUartRxBuf[ucRxIndex++]=DATA_PORT_IN;
		    FLASH_CON_PORT_OUT |= RE;
		  }
		  wGeneralPntCnt++;
	  
	  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])
	    	{
	    		gucUartRxCnt = ucRxIndex-32;
	    		break;	 //next General   	
	    	}//if
	  if (ucGeneralCnt<4)
		 wColumnAddress+=512;
          else
		 wColumnAddress+=16;
	  }//for read next General 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
	gwGeneralPageAddress=wPageAddress; //for write Fax General pointer
  gwColumnAddress=wColumnAddress; //for find blank page
  if (ucAreaOverBlockAddress>10)
  {
  if (wGeneralPntCnt>1)
  {
    ucRxIndex1=ucRxIndex-32;
    ucRxIndex0=ucRxIndex-31;
    wPageAddress=aucUartRxBuf[ucRxIndex0];
    gwPageAddress=(wPageAddress<<8) | aucUartRxBuf[ucRxIndex1];
    gucGeneralStatus |= bitReadFlashMemoryOK; 
  }
  else
    {
     gwPageAddress=cstFaxContentStartPage-1;//2559;//1279;//write the data start address
     gucGeneralStatus &= ~bitReadFlashMemoryOK;
    }
  }
}

						