中断允许位ET11开定时器计数器1中断中断（允许位）TR11开定时器1voidtimer1i
terrupt3。。。。。例5：串口中断响应条件：i
cludereg52hu
sig
edcharavoidmai
TMOD0X20T1方式2TH1FDH9600
fTL1FDH9600TR11开定时器1MOM101串口工作方式1REN1允许串口接收EA1开全局中断ES1开串口中断while1ifRI1RI0；P1SBUF；
voidseri
terrupt4RI0P1SBUF
fr