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单片机模拟I2C总线及24C02读写实例（c源代码）,24C02 read / write process
关键字：单片机模拟I2C总线及24C02读写实例（c源代码）
void Write_One_Byte(char addr,char thedata)
{
bit acktemp=1;
/*write a byte to mem*/
I2C_Start();
WriteI2CByte(0xa0);
acktemp=Check_Acknowledge();
WriteI2CByte(addr);/*address*/
acktemp=Check_Acknowledge();
WriteI2CByte(thedata);/*thedata*/
acktemp=Check_Acknowledge();
I2C_Stop();
}
void Write_A_Page(char *buffer,char addr)
{
bit acktemp=1;
bit wrtmp;
int i;
/*write a page to at24c02*/
I2C_Start();
WriteI2CByte(0xa0);
acktemp=Check_Acknowledge();
WriteI2CByte(addr);/*address*/
acktemp=Check_Acknowledge();
for(i=0;i<7;i++)
{
WriteI2CByte(buffer[i]);
if(!Check_Acknowledge())
{
I2C_Stop();
}
}
I2C_Stop();
}
char Read_One_Byte(char addr)
{ bit acktemp=1;
char mydata;
/*read a byte from mem*/
I2C_Start();
WriteI2CByte(0xa0);
acktemp=Check_Acknowledge();
WriteI2CByte(addr);/*address*/
acktemp=Check_Acknowledge();
I2C_Start();
WriteI2CByte(0xa1);
acktemp=Check_Acknowledge();
mydata=ReadI2CByte();
acktemp=Check_Acknowledge();
return mydata;
I2C_Stop();
}
void Read_N_Bytes(char *buffer,char n,char addr)
{
bit acktemp=1;
int i=0;
/*read 8 bytes from mem*/
I2C_Start();
WriteI2CByte(0xa0);
acktemp=Check_Acknowledge();
WriteI2CByte(addr);/*address*/
acktemp=Check_Acknowledge();
I2C_Start();
WriteI2CByte(0xa1);
acktemp=Check_Acknowledge();
for(i=0;i {
buffer[i]=ReadI2CByte();
if(i!=n-1)
SEND_0(); /*发送应答*/
else
SEND_1(); /*发送非应答*/
}
I2C_Stop();
}
void main()
{
int i;
char mybyte;
char myarray[8];
char myarray2[8];
char rdarray[16];
for(i=0;i<8;i++)
{
myarray[i]=i;
myarray2[i]=i+0x08;
}
Write_One_Byte(0x20,0x28);
Write_A_Page(myarray,0x10);
Write_A_Page(myarray2,0x18);
mybyte=Read_One_Byte(0x20);
Read_N_Bytes(rdarray,16,0x10);
}
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