小弟自己编写的并串转换程序，可是输出总是0，各位大神帮忙看看这个程序是哪里有问题
- always@(posedge clk or negedge rst)
- begin
- if(!rst)
- begin
- load<=1;
- done<=0;
- data_buf<=0;
- sdata<=0;
- end
- else
- begin
- if(load)
- begin
- data_buf<=data_in;
- sdata<=data_buf[15];
- if(done)
- begin
- load<=0;
- end
- else
- begin
- if(count==14)
- begin
- count<=0;
- done<=1;
- end
- else
- begin
- count<=count+1;
- data_buf<=data_buf<<1;
- end
- end
- end
- else
- begin
- data_buf<=0;
- end
- end
- end
- assign sout=sdata;
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