你好,这是我用的一个最简单的sci发送接收的程序,是用串口调试助手发送一个数据,收到后再发送回去用调试工具显示接收的结果,你试试能不能用.我这里可以 #include <hidef.h> /* common defines and macros */
#include <mc9s12dp256.h> /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dp256b" int i,j,k,m=0;char t[]={0xaa,0xff,0xa5,0x55};
void main()
{DisableInterrupts; /*禁止中断*/
//初始化SCI
SCI0BDL=0x34; /*波特率常数为52，设置波特率为9600*/
SCI0BDH=0x00;
SCI0CR1=0x00;
//SCI0CR1_LOOPS=0; /*正常工作模式*/
//SCI0CR1_SCISWAI=0; /*等待模式下继续工作*/
//SCI0CR1_RSRC=0; /*LOOPS为零此位无效*/
//SCI0CR1_M=0; /*传输数据位为8位*/
//SCI0CR1_WAKE=0; /*介质唤醒方式*/
//SCI0CR1_ILT=0; /*保守检测*/
//SCI0CR1_PE=0; /*不进行奇偶校验*/
//SCI0CR1_PT=0; /*SCI0CR1_PE=0;此位无效*/ SCI0CR2=0x0c;
//SCI0CR2_SCTIE=0; /*禁止发送器中断*/
//SCI0CR2_TCIE=0; /*禁止发送结束中断*/
//SCI0CR2_RIE=0; /*禁止接受中断*/
//SCI0CR2_ILIE=0; /*禁止空闲中断*/
//SCI0CR2_TE=1; /*发送允许*/
//SCI0CR2_RE=1; /*允许接受*/
//SCI0CR2_RWU=0; /*接收器正常唤醒*/
//SCI0CR2_SBK=0; /*中止符发送器关闭*/
i=SCI0SR1;
i=SCI0DRL;
DDRB=0xff;
while(1)
{
if(SCI0SR1_RDRF!=0){
PORTB=SCI0DRL;
k=SCI0DRL;
if(SCI0SR1_TDRE==1){
SCI0DRL=k; /*发送字符串*/
SCI0DRH=0;
m++;
}
}
}
}
[此贴子已经被作者于2009-3-9 0:24:43编辑过] | 
