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标题: 有关数据传输的问题？ [打印本页]

作者: reporter 时间: 2013-11-5 10:25 标题: 有关数据传输的问题？

interrupt void sciaTxFifoIsr(void)
{
&nbsp; &nbsp; Uint16 i;
&nbsp; &nbsp; for(i=0; i&lt; 8; i++)
&nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; SciaRegs.SCITXBUF=sdataA;&nbsp; &nbsp;&nbsp;&nbsp;// Send data
&nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; for(i=0; i&lt; 8; i++)&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//Increment send data for next cycle
&nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; sdataA = (sdataA+1) &amp; 0x00FF;
&nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; &nbsp; &nbsp; SciaRegs.SCIFFTX.bit.TXFFINTCLR=1;&nbsp; &nbsp; &nbsp; &nbsp; // Clear SCI Interrupt flag
&nbsp; &nbsp; &nbsp; &nbsp; PieCtrlRegs.PIEACK.all|=0x100;&nbsp; &nbsp;&nbsp; &nbsp;// Issue PIE ACK
}
不太明白这句sdataA = (sdataA+1) &amp; 0x00FF的意思， &amp; 是取地址，(sdataA+1)这个事什么情况

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