单步调试与全速调试求解

只看该作者 · 2012-10-8 21:29

void IICRead(unsigned int i ) // read data  by my understanding
{
  IICInit();
  rIICDS = 0xA1;
  rIICSTAT = 0xB0;
  while( rIICSTAT & 0x1 );  //wait ACK

  ClearInt();
  buf[i] = rIICDS;
  Uart_Printf("buf[");
  Uart_Printf("%d",i);
  Uart_Printf("]: %X\n",buf[i]);
  rIICCON = 0xE0; //resume iic,generate ACK
  while( rIICSTAT & 0x1 );  //wait ACK
   buf[i] = rIICDS;//单步调试这里就出数据了
  Uart_Printf("buf[");
  Uart_Printf("%d",i);
  Uart_Printf("]: %X\n",buf[i]);
  ClearInt();
  rIICSTAT = 0x90;
  rIICCON = 0x60;    //resume iic, no ACK
  while( ! (rIICSTAT & 0x1 ) );  //wait NO-ACK
buf[i] = rIICDS;////全速调试这里才出数据了
  Uart_Printf("buf[");
  Uart_Printf("%d",i);
  Uart_Printf("]: %X\n",buf[i]);
  //while( (rIICSTAT >> 5) & 1); //wait stop

  IICRest();
}

IIC读个EPPROM(at24c02)
是不是全速跑的时候，时序就乱了？或者说，单步调试的时候，硬件准备的时间足够???