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![](static/image/common/ico_lz.png)
楼主 |
发表于 2010-8-26 17:14:51
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组合逻辑程序,麻烦大家
//----------------------------------------------------------------------------------
always @(trig or not_ctr_fir or gate_ctr)
begin
choose_signal(trig[0], not_ctr_fir[0], gate_ctr[0], out_sec_1[0]);
choose_signal(trig[1], not_ctr_fir[1], gate_ctr[1], out_sec_1[1]);
choose_signal(trig[2], not_ctr_fir[2], gate_ctr[2], out_sec_1[2]);
choose_signal(trig[3], not_ctr_fir[3], gate_ctr[3], out_sec_1[3]);
choose_signal(trig[4], not_ctr_fir[4], gate_ctr[4], out_sec_1[4]);
choose_signal(trig[5], not_ctr_fir[5], gate_ctr[5], out_sec_1[5]);
out_thi_1 = & out_sec_1;
choose_signal(trig[0], not_ctr_fir[6], gate_ctr[6], out_sec_2[0]);
choose_signal(trig[1], not_ctr_fir[7], gate_ctr[7], out_sec_2[1]);
choose_signal(trig[2], not_ctr_fir[8], gate_ctr[8], out_sec_2[2]);
choose_signal(trig[3], not_ctr_fir[9], gate_ctr[9], out_sec_2[3]);
choose_signal(trig[4], not_ctr_fir[10], gate_ctr[10], out_sec_2[4]);
choose_signal(trig[5], not_ctr_fir[11], gate_ctr[11], out_sec_2[5]);
out_thi_2 = & out_sec_2;
choose_signal(trig[0], not_ctr_fir[12], gate_ctr[12], out_sec_3[0]);
choose_signal(trig[1], not_ctr_fir[13], gate_ctr[13], out_sec_3[1]);
choose_signal(trig[2], not_ctr_fir[14], gate_ctr[14], out_sec_3[2]);
choose_signal(trig[3], not_ctr_fir[15], gate_ctr[15], out_sec_3[3]);
choose_signal(trig[4], not_ctr_fir[16], gate_ctr[16], out_sec_3[4]);
choose_signal(trig[5], not_ctr_fir[17], gate_ctr[17], out_sec_3[5]);
out_fou_3 = & out_sec_3;
end
//----------------------------------------------------------------------------------
//---------------------------------------------------
//task
task choose_signal;
input trig_r;
input not_ctr_fir_r;
input gate_ctr_r;
output out_sec_r;
if(not_ctr_fir_r)
begin
if(gate_ctr_r) out_sec_r = ~trig_r;
else out_sec_r = 1'b1;
end
else
begin
if(gate_ctr_r) out_sec_r = trig_r;
else out_sec_r = 1'b1;
end
endtask
//---------------------------------------------------
always @(out_thi_1 or not_ctr_sec[0])
if(not_ctr_sec[0]) out_fou_1 = ~out_thi_1;
else out_fou_1 = out_thi_1;
always @(out_thi_2 or not_ctr_sec[1])
if(not_ctr_sec[1]) out_fou_2 = ~out_thi_2;
else out_fou_2 = out_thi_2;
always @(not_ctr_third or out_fou_1 or out_fou_2 or out_fou_3)
if(not_ctr_third) out_logic = ~(out_fou_1 & out_fou_2 & out_fou_3);
else out_logic = out_fou_1 & out_fou_2 & out_fou_3;
应该是门延时造成的,请问应该怎么办?难道用时序逻辑来做吗? |
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