AT24C256完整程序文档格式.docx
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- 上传时间:2023-05-05
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AT24C256完整程序文档格式.docx
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sbitISDA=P1^3;
/*****************************************
I2cWait
WaitforsometimetogetproperI2Ctiming
voidI2cWait(void)
{
I2csotp
conditionSDA=0-1whileSCL=1
voidI2cStop(void)
ISDA=0;
I2cWait();
ISCL=1;
ISDA=1;
}
I2cInit
InitializeI2Cinterface
ReleaseI2cBUS
****************************************
voidI2cInit(void)
**/
I2cSentByte
mastertransferdatatoslaveandreturnacknowledgebit
don'
tinclude<
intrins.h>
bitI2cSentByte(unsignedcharbytedata)
unsignedchari;
bitack;
for(i=0;
i<
8;
i++)
{
if(bytedata&
0x80)
else
bytedata<
<
=1;
ISCL=0;
}
ack=ISDA;
returnack;
I2cReceiveByte
slavetrransferdatatomaster
unsignedcharI2cReceiveByte(void)
unsignedcharbytedata=0;
bytedata=bytedata<
1;
if(ISDA==1)
{
bytedata=bytedata|0x01;
}
I2cWait();
returnbytedata;
I2cSendAcknowledge
Mastersendacknowledgebittoslave
acknowledge="
0"
non-acknowledge="
1"
voidSendAcknowledge(bitack)
ISDA=ack;
24c64WriteByte
addr:
0-8192
value:
数据
void_24c64WriteByte(unsignedintaddr,unsignedcharvalue)
I2cStart();
I2cSentByte(0xA0);
I2cSentByte(addr>
>
8);
//送高位地址
I2cSentByte(addr&
0xff);
//送低位地址
I2cSentByte(value);
I2cStop();
delay1ms(15);
24c64WriteMulti
page:
0-255
count:
要写入的数个数
******************************************/
void_24c64WriteMulti(unsignedintpage,unsignedcharcount,unsignedchar*SenBuf)
unsignedintaddr=page*32;
I2cSentByte(0xa0);
0x00ff);
count;
I2cSentByte(SenBuf[i]);
24c64ReadByte
unsignedchar_24c64ReadByte(unsignedintaddr)
unsignedchartemp;
I2cSentByte(0xa1);
temp=I2cReceiveByte();
SendAcknowledge
(1);
returntemp;
24c64ReadMulti
0-256,count0-32
要读出的数的个数
void_24c64ReadMulti(unsignedintpage,unsignedcharcount,unsignedchar*RedBuf)
{unsignedintaddr=page*32;
RedBuf[i]=_24c64ReadByte(addr);
addr++;
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