单片机模拟I2C总线及24C02读写实例（c源代码）

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);
      }