mod 切换模式，一共有停机s0,调整时间s1，漂洗s2，洗涤s3，脱水s4，共五种状态
add 为调整时间累加,最后赋给timecount
piaocount 是漂洗计数
xicount是洗涤计数
tuocount是脱水计数
zheng表示电机正转
fan表示电机反转
module wash(mod,add,led1,led2,led3,led4,clk,zheng,fan);
input mod,add,clk;
output led1,led2,led3,led4,zheng,fan;
reg led1,led2,led3,led4;
reg zheng,fan;
reg [9:0] timecount,counter;
reg [4:0] piaocount,xicount,tuocount;
reg [2:0] state;
parameter s0=3'b000;
parameter s1=3'b001;
parameter s2=3'b010;
parameter s3=3'b011;
parameter s4=3'b100;
always @(posedge add)
begin
if(counter<600)
counter<=counter+10'd60;
else
counter<=0;
end
always @(posedge clk)
begin
begin
zheng<=0;
fan<=0;
end
case(state)
s0:
begin
zheng<=0;fan<=0;
timecount<=0;
led1<=1'b0;
led2<=1'b0;
led3<=1'b0;
led4<=1'b0;
piaocount<=5'b00000;
xicount<=5'b00000;
tuocount<=5'b00000;
if(mod)
state<=s1;
else
state<=s0;
end
s1:begin
led1<=1'b1;
led2<=1'b0;
led3<=1'b0;
led4<=1'b0;
begin
timecount<=counter;
end
if(mod)
state<=s2;
else
state<=s1;
end
s2:begin
led1<=1'b0;
led2<=1'b1;
led3<=1'b0;
led4<=1'b0;
piaocount<=5'b00000;
xicount<=5'b00000;
tuocount<=5'b00000;
if(mod)
state<=s3;
else
state<=s2;
begin
piaocount<=piaocount+1'b1;
if(piaocount==5'b01010)
piaocount<=5'b00000;
else if(piaocount>=5'b00101)
begin
zheng<=1'b1;fan<=1'b0;
end
else
begin
zheng<=1'b0;fan<=1'b1;
end
end
end
s3:begin
led1<=1'b0;
led2<=1'b0;
led3<=1'b1;
led4<=1'b0;
piaocount<=5'b00000;
xicount<=5'b00000;
tuocount<=5'b00000;
if(mod)
state<=s4;
else
state<=s3;
begin
xicount<=xicount+1'b1;
if(xicount==5'b10100)
xicount<=5'b00000;
else if(xicount>=5'b01010)
begin
zheng<=1'b1;fan<=1'b0;
end
else
begin
zheng<=1'b0;fan<=1'b1;
end
end
end
s4:begin
led1<=1'b0;
led2<=1'b0;
led3<=1'b0;
led4<=1'b1;
piaocount<=5'b00000;
xicount<=5'b00000;
tuocount<=5'b00000;
if(mod)
state<=s0;
else
state<=s4;
begin
tuocount<=tuocount+1'b1;
if(tuocount==5'b00010)
tuocount<=5'b00000;
else if(tuocount>=4'b00001)
begin
zheng<=1'b1;fan<=1'b0;
end
else
begin
zheng<=1'b0;fan<=1'b1;
end
end
end
default:
begin
state<=s0;
end
endcase
end
endmodule
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