求各位帮忙看下哪里有问题

只看该作者 · 2018-1-2 20:27

源代码如下
module miaobiao(
input up,down,left,right,clk,rst,stop,
output  led,
output  display_out
);
reg[3:0] led;
reg[10:0] display_out;
reg[30:0] cnt_1s;
reg[20:0] clk_1s;
reg[30:0] cnt_1ms;
reg[20:0] clk_1ms;
wire [4:0] secondL;
wire [3:0] secondH;
wire [4:0] minuteL;
wire [3:0] minuteH;
reg [10:0] minute;
reg [10:0] second;
reg up;
reg down;
reg left;
reg right;
reg [2:0] stop;

//1hz分频
always@(posedge clk or negedge rst)
begin
      if(!rst)
         clk_1s <= 1'b0;
      else if (stop==1'b1)
         clk_1s <= clk_1s;
      else if (cnt_1s==31'd99999999)begin
         cnt_1s <= 1'b0;
         clk_1s <= ~clk_1s;end
      else if (cnt_1s<31'd99999999)
         cnt_1s <= cnt_1s+1'b1;
end

//1khz分频
always@(posedge clk or negedge rst)
begin
      if(!rst)
         clk_1ms <= 1'b0;
      else if (stop==1'b1)
         clk_1ms <= clk_1ms;
      else if (cnt1==31'd99999)begin
         cnt_1ms <= 1'b0;
         clk_1ms <= ~clk_1ms;end
      else
         cnt_1ms <= cnt_1ms+1'b1;
end

//计时部分
always@(posedge clk_1s or negedge rst)
begin
      if (!rst)begin
         secondL <= 1'b0;
         secondH <= 1'b0;
         minuteL <= 1'b0;
         minuteH <= 1'b0;
         clk <= 1'b0;end
      else if (stop)
         second <= second;
         minute <= minute;
      if(second==59)//秒针进位
         begin
            second<=0;
            if(minute==59)
            begin
                  minute<=0;
            end
            else if(minute<59)//分钟数进位
            begin
                  minute<=minute+1;
            end
         end
      else if (second<59)
         begin
               second<=second+1;
      end

//显示

assign secondL = second%10;
assign secondH = second/10;
assign minuteL = minute%10;
assign minuteH = minute/10;

always @(posedge clk_1ms or negedge rst)
begin
      if (!rst)begin
         second <= 0;
         minute <= 0;
         end
      else if (stop==1)begin
         display_out <= display_out;end
      else begin
         case(secondL)
            1'd0: display_out <=11'b1110_0000001;
            1'd1: display_out <=11'b1110_1001111;
            1'd2: display_out <=11'b1110_0010010;
            1'd3: display_out <=11'b1110_0000110;
            1'd4: display_out <=11'b1110_1001100;
            1'd5: display_out <=11'b1110_0100100;
            1'd6: display_out <=11'b1110_0100000;
            1'd7: display_out <=11'b1110_0001111;
            1'd8: display_out <=11'b1110_0000000;
            1'd9: display_out <=11'b1110_0000100;
         endcase
         case (secondH)
            1'd0: display_out <=11'b1101_0000001;
            1'd1: display_out <=11'b1101_1001111;
            1'd2: display_out <=11'b1101_0010010;
            1'd3: display_out <=11'b1101_0000110;
            1'd4: display_out <=11'b1101_1001100;
            1'd5: display_out <=11'b1101_0100100;
         endcase
         case (minuteL)
            1'd0: display_out <=11'b1011_0000001;
            1'd1: display_out <=11'b1011_1001111;
            1'd2: display_out <=11'b1011_0010010;
            1'd3: display_out <=11'b1011_0000110;
            1'd4: display_out <=11'b1011_1001100;
            1'd5: display_out <=11'b1011_0100100;
            1'd6: display_out <=11'b1011_0100000;
            1'd7: display_out <=11'b1011_0001111;
            1'd8: display_out <=11'b1011_0000000;
            1'd9: display_out <=11'b1011_0000100;
         endcase
         case (minuteH)
            1'd0: display_out <=11'b0111_0000001;
            1'd1: display_out <=11'b0111_1001111;
            1'd2: display_out <=11'b0111_0010010;
            1'd3: display_out <=11'b0111_0000110;
            1'd4: display_out <=11'b0111_1001100;
            1'd5: display_out <=11'b0111_0100100;
         endcase
         end
      end

//左移、右移
always @(posedge clk_1ms)
begin
      if (!rst)
         led <= 4'b0000;
      else begin
         led <= 4'b0001;
         if (led == 4'b0001)begin
            if (left==1)
                  led <= led <<1;
            else if (right==1)
                  led <= led;
         end
         else if (led == 4'b1000)begin
            if (left==1)
                  led <= led;
            else if (right==1)
                  led <= led >>1;
         end
         else if (led == 4'b0100 || led == 4'b0010)begin
            if (left==1)
                  led <= led <<1;
            else if (right==1)
                  led <= led >>1;
         end
      end
end

//调整数字
always @(posedge clk_1ms)
begin
      if (stop==1) begin
         if(led == 4'b1000)begin
            if(up == 1'b1)
                  minuteH <= minuteH + 1 ;
            else if (down == 1'b1)
                  minuteH <= minuteH - 1;
         end
         else if(led == 4'b0100)begin
            if (up==1'b1)
                  minuteL<= minuteL+ 1 ;
            else if (down == 1'b1)
                  minuteL<= minuteL- 1;
         end
         else if(led == 4'b0010)begin
            if(up == 1'b1)
                  secondH <= secondH + 1 ;
            else if (down == 1'b1)
                  secondH <= secondH - 1;
         end
         else if(led == 4'b0001)begin
            if(up == 1'b1)
                  secondL <= secondL + 1 ;
            else if (down == 1'b1)
                  secondL <= secondL - 1;
         end
      end
end

endmodule
错误信息如下
[HDL 9-806] Syntax error near "always" . [miaobiao.v:109]
[HDL 9-806] Syntax error near "always" . [miaobiao.v:162]
[HDL 9-806] Syntax error near "always" . [miaobiao.v:190]
[HDL 9-806] Syntax error near "endmodule" . [miaobiao.v:220]
第一个always是在assign语句下面那个，然后后面的always都是紧跟着的后面的always 。