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其中一个process如下,可不可以这样计数呀,就是不同的状态要延续不同的时间
- process(clk,reset,call)
- begin
- if(reset='1')then
- cur_st<=s0;
- else
- if(cur_st=s0)then
- if(clk'event and clk='1')then
- if(call='0')then
- if(count0=4999)then
- cur_st<=next_st;
- count0<=0;
- else
- count0<=count0+1;
- end if;
- end if;
- end if;
- elsif(cur_st=s1 or cur_st=s3)then
- if(clk'event and clk='1')then
- if(call='0')then
- if(count1=24999)then
- cur_st<=next_st;
- count1<=0;
- else
- count1<=count1+1;
- end if;
- end if;
- end if;
- elsif(cur_st=s2 or cur_st=s4)then
- if(clk'event and clk='1')then
- if(call='0')then
- if(count2=9999)then
- cur_st<=next_st;
- count2<=0;
- else
- count2<=count2+1;
- end if;
- end if;
- end if;
- end if;
- end if;
- end process;
复制代码 出现如下编译错误,求救啊!!! 怎么改呀???
Error (10821): HDL error at jiaotongdeng.vhd(21): can't infer register for "cur_st.s4" because its behavior does not match any supported register model
Error (10821): HDL error at jiaotongdeng.vhd(21): can't infer register for "cur_st.s3" because its behavior does not match any supported register model
Error (10821): HDL error at jiaotongdeng.vhd(21): can't infer register for "cur_st.s2" because its behavior does not match any supported register model
Error (10821): HDL error at jiaotongdeng.vhd(21): can't infer register for "cur_st.s1" because its behavior does not match any supported register model
Error (10821): HDL error at jiaotongdeng.vhd(21): can't infer register for "cur_st.s0" because its behavior does not match any supported register model
Error (10822): HDL error at jiaotongdeng.vhd(33): couldn't implement registers for assignments on this clock edge
Error (10822): HDL error at jiaotongdeng.vhd(44): couldn't implement registers for assignments on this clock edge
Info (10018): Can't recognize finite state machine "cur_st" because it has a complex reset state
Error: Can't elaborate top-level user hierarchy
Error: Quartus II Analysis & Synthesis was unsuccessful. 8 errors, 6 warnings
Error: Peak virtual memory: 214 megabytes
Error: Processing ended: Wed Aug 24 15:50:17 2011
Error: Elapsed time: 00:00:03
Error: Total CPU time (on all processors): 00:00:03
Error: Quartus II Full Compilation was unsuccessful. 10 errors, 6 warnings |
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