PIC18F单片机硬件IIC从模式

主机发送数据格式，器件地址+子地址+数据，程序只能接收到 器件地址+子地址，而主机发送数据字节时，从机响应非应答。图为单片机手册给出的接收时序图，思考中……

void initIIC()

{

 PORTC=0x02;
 LATC=0x00;
 TRISC=0x18;

 INTCON |=0xC0;
 PIE1 |=0x08;
 SSPADD =0x90;
 SMP=1;
 CKE=0;
 SSPCON1 =0x3e;
}

void interrupt I2c(void)

{
 if (SSPIF){

   SSPIF=0;
   SSPOV=0;
   i2cSlaveInt_Handler();
 }

}

void i2cSlaveInt_Handler()
{
  uchar command;
  command = SSPSTAT & 0x2D;
       
  switch( command )       
  {
  case 0x09:         // Master写,接收的字节是地址
    tmpSTAT = SSPBUF;
  break;                                                                                                                               

 case 0x29:          //Master写,接收的字节是数据
   data[count++]=SSPBUF;
   if(count>=10)
     count=0;
   else
     asm("nop");
 break;                                                                             

 case 0x28:         //操作完成,释放时钟
   CKP=1;
 break;                                                                                                                               

default:

break;
   } 
}