www.pudn.com > TCPmodbushy.rar > OP_FlashOfCP220.c

/****************************************************************************** 
 * Module Name : OP_FlashOfCP220.C 
 * CPU Type    : c8051 
 * 
 * Description :  
 * 
 * History        Author     Version       Comment 
 * 06.09.15       sjh        V0.1          Original version 
 * 
 * Copyright (C) 2003 Xinje Electronic Co., Ltd. All rights reserved. 
 ******************************************************************************/ 
#include "o:\netif\CP220x_REG.h" 
#include "o:\netif\OP_FlashOfCP220.h" 
 
 
bit data OpenEA; 
/****************************************************************************** 
* erase  
******************************************************************************/ 
void EraseFlash( unsigned int iSetorAdd ) 
{ 
OpenEA = EA; 
EA = OFF; 
	/* Step 1: Write 0xA5 followed by 0xF1 to FLASHKEY. */ 
	FLASHKEY = 0xA5; 
	FLASHKEY = 0xF1; 
	/* Step 2: Set FLASHADDRH:FLASHADDRL to any address within the 512-byte page to be erased. */ 
	FLASHADDRH = HIGH_BYTE( iSetorAdd ); 
	FLASHADDRL = LOW_BYTE( iSetorAdd ); 
	/* Step 3: Write the value 0x01 to FLASHERASE. */ 
	FLASHERASE = 0x01; 
	/* Step 4: Check FLASHSTA to determine when the Flash operation is complete. The Flash Write/Erase */ 
	while( FLASHSTA & FLBUSY ) 
		continue; 
EA = OpenEA; 
} 
 
/****************************************************************************** 
* Write Data To byte  
* Note: 1.donot call this function in IntProcess Function;  
* Note: 2.data be Written's space be ensure to erase    
******************************************************************************/ 
void WriteByteToFlash( unsigned int iSetorAdd, unsigned char chData ) 
{ 
OpenEA = EA; 
EA = OFF; 
	/* Step 1: Write 0xA5 followed by 0xF1 to FLASHKEY. */ 
	FLASHKEY = 0xA5; 
	FLASHKEY = 0xF1; 
	/* Step 2: Set FLASHADDRH:FLASHADDRL to the address of the byte to be written. */ 
	FLASHADDRH = HIGH_BYTE( iSetorAdd ); 
	FLASHADDRL = LOW_BYTE( iSetorAdd ); 
	/* Step 3: Write the value to be written to the FLASHDATA register. */ 
	FLASHDATA = chData; 
	/* Step 4: Check FLASHSTA to determine when the Flash operation is complete. */ 
	while( FLASHSTA & FLBUSY ) 
		continue; 
EA = OpenEA; 
} 
 
/****************************************************************************** 
* Write Mul bytes 
* Note: once Write Bytes most is 256   
******************************************************************************/ 
void WriteMulByteSToFlash( unsigned int iSetorAdd, unsigned char chCount, unsigned char xdata *pData ) 
{ 
	unsigned char i; 
 
	for( i=0; i