[求助]串口接收不到数据

[slisent]

我是用串口线连接两台计算机的
一台用来发送
一台用来接收

然后在发送端程序：
clear;
s=serial('com2','baudrate',1200);
s.Parity='none' ; % Set parity as none
s.Databits=8 ; % set the number of data bits
s.StopBits=1; % set number of stop bits as 1
s.InputBufferSize=512;
s.Timeout=5;
s.Terminator='LF';
s.FlowControl='none';
s.OutputBufferSize=512;
fopen(s);
s.status;
fprintf(s,'abc','async');
fclose(s);
delete(s);
clear s;

接收端程序:
clear;
s=serial('com2','baudrate',1200);
s.Parity='none' ; % Set parity as none
s.Databits=8 ; % set the number of data bits
s.StopBits=1; % set number of stop bits as 1
s.InputBufferSize=512;
s.Timeout=5;
s.Terminator='LF';
s.FlowControl='none';
s.OutputBufferSize=512;
fopen(s);
s.status;
a=fscanf(s);
fclose(s);
delete(s);
clear s;

结果超时的时间到了,还读不到数据,这是为什么啊?
谁帮忙看下?
谢谢了