SCI 通信问题

zhouzhou1988

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dp512.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dp512"

  void SciInit()

{

SCI0BD=52; //9600bps Baud Rate=BusClock/(16*SCIBD)

SCI0CR1=0xa0; //正常8位模式，无奇偶校验

SCI0CR2=0X2C; //发送允许 接受中断允许

}

//-----------------写SCI数据---------------------------------//

void SciWrite(unsigned char sendchar)

{

while (!SCI0SR1_TDRE);

SCI0DRH=0;

SCI0DRL=0X45;

}      

//------------------------main----------------------------------//

void main(void)

{
  DDRA=0XFF;

SciInit();
SciWrite(0xff) ;

EnableInterrupts;

for(;;)

{

} /* wait forever */

/* please make sure that you never leave this function */

}

高手帮看看，程序是否有问题，我发送端口怎么没数据输出呢？

laoniuxxj

没读呢