www.pudn.com > uCOSV262.rar > AT24C256.c

#include "IIC.h" 
#include "at24c256.h" 
 
unsigned char AT24C256_ReadBlock(unsigned int blockAddress,unsigned char *recBuf); 
unsigned char AT24C256_WriteBlock(unsigned int blockAddress,unsigned char *SendBuf); 
unsigned char AT24C256_ReadMultiBlock(unsigned int blockAddress,unsigned int blockNum,unsigned char *recBuf); 
unsigned char AT24C256_WriteMultiBlock(unsigned int blockAddress,unsigned int blockNum,unsigned char *sendBuf); 
 
 
unsigned char AT24C256_ReadBlock(unsigned int blockAddress,unsigned char *recBuf) 
{ 
    unsigned char  slaveAddress; 
	unsigned int  tmp; 
	unsigned char subAddress[2]; 
    if(blockAddress>=(AT24C256_BLOCK_SIZE*4)) 
	    return 0; 
	if(blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	if((blockAddress>=AT24C256_BLOCK_SIZE)&&(blockAddress<(AT24C256_BLOCK_SIZE*2))) 
	{ 
	    slaveAddress = AT24C256_ADDRESS +0x01; 
		tmp = (blockAddress-AT24C256_BLOCK_SIZE); 
		tmp *= (AT24C256_BYTE_SIZE); 
		subAddress[0] = (unsigned char) (tmp>>8); 
		subAddress[1] =	(unsigned char)  tmp; 
	} 
	if(blockAddress>=AT24C256_BLOCK_SIZE*2&blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	if(blockAddress>=AT24C256_BLOCK_SIZE*3&blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	return SmbRec(slaveAddress,subAddress,TWO_BYTE_SUBA,AT24C256_BYTE_SIZE,recBuf); 
 
} 
 
unsigned char AT24C256_WriteBlock(unsigned int blockAddress,unsigned char *SendBuf) 
{ 
    unsigned char  slaveAddress; 
	unsigned int  tmp; 
	unsigned char subAddress[2]; 
    if(blockAddress>=AT24C256_BLOCK_SIZE*4) 
	    return 0; 
	if(blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	if(blockAddress>=AT24C256_BLOCK_SIZE&blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	if(blockAddress>=AT24C256_BLOCK_SIZE*2&blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	if(blockAddress>=AT24C256_BLOCK_SIZE*3&blockAddress>8); 
		subAddress[1] =	(unsigned char)  (tmp); 
	} 
	return SmbSend(slaveAddress,subAddress,TWO_BYTE_SUBA,AT24C256_BYTE_SIZE,SendBuf); 
} 
 
unsigned char AT24C256_ReadMultiBlock(unsigned int blockAddress,unsigned int blockNum,unsigned char *recBuf) 
{	  
    unsigned char tmp; 
	unsigned char tmp1; 
    for(tmp=0;tmp