可是传送8位参数则不成功。代码如下：
module MAX7219 ( input clk_i, input rst_i, //inout wire sdo_i,//串行数据回读 output reg sdin_o,//串行输出数据 output reg sclk_o,//串行时钟 output reg load_o//更新da寄存器 // input wire [3:0]add, //input wire [15:0]segdata ); reg [7:0] olddata; reg [22:0] currentstate; parameter s1 = 23'b000_0000_0000_0000_0000_0001; parameter s2 = 23'b000_0000_0000_0000_0000_0010;//s1和S2状态设置译码寄存器 parameter s3 = 23'b000_0000_0000_0000_0000_0100; parameter s4 = 23'b000_0000_0000_0000_0000_1000;//S3和S4状态设置亮度寄存器 parameter s5 = 23'b000_0000_0000_0000_0001_0000;// parameter s6 = 23'b000_0000_0000_0000_0010_0000;//S6和S5状态设置扫描限值寄存器 parameter s7 = 23'b000_0000_0000_0000_0100_0000;// parameter s8 = 23'b000_0000_0000_0000_1000_0000; //S7和S8状态 设置正常显示模式 parameter s9 = 23'b000_0000_0000_0001_0000_0000; //S7和S8状态 设置正常显示模式 parameter s10 =23'b000_0000_0000_0010_0000_0000;// parameter s11 =23'b000_0000_0000_0100_0000_0000;//s10和是1状态 送入显示的数据 parameter s12 = 23'b000_0000_0000_1000_0000_0000; parameter s13 = 23'b000_0000_0001_0000_0000_0000;//s1和S2状态设置译码寄存器 parameter s14 = 23'b000_0000_0010_0000_0000_0000; parameter s15 = 23'b000_0000_0100_0000_0000_0000;//S3和S4状态设置亮度寄存器 parameter s16 = 23'b000_0000_1000_0000_0000_0000;// parameter s17 = 23'b000_0001_0000_0000_0000_0000;//S6和S5状态设置扫描限值寄存器 parameter s18 = 23'b000_0010_0000_0000_0000_0000;// parameter s20 = 23'b000_1000_0000_0000_0000_0000; //S7和S8状态 设置正常显示模式 parameter s21 = 23'b001_0000_0000_0000_0000_0000; //S7和S8状态 设置正常显示模式 //parameter s21 =26'b00_0001_0000_0000_0000_0000_0000;// //parameter s22 =26'b00_0010_0000_0000_0000_0000_0000;//s10和是1状态 送入显示的数据 //parameter s23 =26'b00_0100_0000_0000_0000_0000_0000;// //parameter s24 =26'b00_1000_0000_0000_0000_0000_0000;//s10和是1状态 送入显示的数据 parameter Init=23'b010_0000_0000_0000_0000_0000; parameter Init1=23'b100_0000_0000_0000_0000_0000; //reg sclk_o; reg [5:0]counter; parameter seg1 = 8'h11, //1. seg2 = 8'h81, //2 seg3 = 8'h12, //3 seg4 = 8'h02, //4 seg5 = 8'h13, //1. seg6 = 8'h03, //2 seg7 = 8'h14, //3 seg8 = 8'h09; //4 reg [2:0]cnt; parameter tics=30; task delaydisp; input[2:0] i; repeat(tics) begin i=1; i=2; i=3; end endtask //产生时钟 always @(posedge clk_i) begin if(!rst_i) begin counter<=6'd0; sclk_o <= 1'b1; end else begin if(counter==6'd9) begin sclk_o <= ~sclk_o; counter<=6'd0; end else counter<=counter+6'd1; end end reg [2:0] sclk_cnt;//同步时钟计数器，7 always @(posedge sclk_o or negedge rst_i) begin if(!rst_i) sclk_cnt <= 1'b0; else case(currentstate) Init1,s2,s4,s6,s8,s10,s12,s14,s16,s18,s21: if(3'd7 == sclk_cnt) sclk_cnt <= 1'b0; else sclk_cnt <= sclk_cnt + 1'b1; default: sclk_cnt <= 1'b0; endcase end //主状态机 always @(posedge sclk_o or negedge rst_i) begin if(!rst_i) begin currentstate <=Init; cnt = 3'b0; end else case(currentstate) Init:currentstate <=Init1; Init1:begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s1; else currentstate <= Init1; end s1: currentstate <= s2; //s1和S2状态设置译码寄存器 s2:begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s3; else currentstate <= s2; end s3: currentstate <= s4;//S3和S4状态设置亮度寄存器 s4: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s5; else currentstate <= s4; end s5: currentstate <= s6;// S6和S5状态设置扫描限值寄存器 s6: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s7; else currentstate <= s6; end s7: currentstate <= s8;// S7和S8状态 设置正常显示模式 s8: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s9; else currentstate <= s8; end s9: currentstate <= s10;// S7和S8状态 设置正常显示模式 s10: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s11; else currentstate <= s10; end s11: currentstate <= s12;// S7和S8状态 设置正常显示模式 s12: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s13; else currentstate <= s12; end s13: currentstate <= s14;// S7和S8状态 设置正常显示模式 s14: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s15; else currentstate <= s14; end s15: currentstate <= s16;// S7和S8状态 设置正常显示模式 s16: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s17; else currentstate <= s16; end s17: currentstate <= s18;// S7和S8状态 设置正常显示模式 s18: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 currentstate <= s20; else currentstate <= s18; end //初始化完成 s20: if(olddata != data) currentstate <= s21;// 正常送数据显示 else currentstate <= s20; s21: begin if(3'd7 == sclk_cnt) //8个时钟周期将数据送出去 begin currentstate <= s20; cnt = cnt + 1'b1; end else currentstate <= s21; end endcase end //各状态的处理 reg [7:0] data; always @(posedge sclk_o or negedge rst_i) begin if(!rst_i)begin data <= 8'h00; olddata <= 8'h00; end else case(currentstate) Init:begin data <= 8'h0a;delaydisp(20); end s1:begin data <= 8'h04;delaydisp(20); end //正常显示模式 s3:begin data <= 8'h0c;delaydisp(20); end//编码寄存器 ALL CODE B DECODE s5:begin data <= 8'h01;delaydisp(20); end//亮度寄存器 ALL max on s7:begin data <= 8'h09;delaydisp(20); end //扫描限值寄存器 ALL on s9:begin data <= 8'hff;delaydisp(20); end //正常显示模式 s11:begin data <= 8'h0f;delaydisp(20); end //编码寄存器 ALL CODE B DECODE s13:begin data <= 8'h01;delaydisp(20); end //亮度寄存器 ALL max on s15:begin data <= 8'h0b;delaydisp(20); end //扫描限值寄存器 ALL on s17:begin data <= 8'h07;delaydisp(20); end //扫描限值寄存器 ALL on s20: begin case(cnt) 3'd0: begin data <= seg1;delaydisp(20); end 3'd1: begin data <= seg2;delaydisp(20); end 3'd2: begin data <= seg3;delaydisp(20); end 3'd3: begin data <= seg4;delaydisp(20); end 3'd4: begin data <= seg5;delaydisp(20); end 3'd5: begin data <= seg6;delaydisp(20); end 3'd6: begin data <= seg7;delaydisp(20); end 3'd7: begin data <= seg8;delaydisp(20); end endcase olddata <= data; end //待显示的数据 Init1,s2,s4,s6,s8,s10,s12,s14,s16,s18,s21: begin data <= data << 1; olddata <= olddata; end//循环移位 将高位送出 default: begin data <= 8'h00; olddata <= olddata; end endcase end //----------数据串行--------- always @(posedge sclk_o or negedge rst_i) begin if(!rst_i) sdin_o <= 1'b0; else case(currentstate) Init1,s2,s4,s6,s8,s10,s12,s14,s16,s18,s21: sdin_o <= data[7]; default: sdin_o <= 1'b0; endcase end //----------串行数据写有效LOAD---------- always @(posedge sclk_o or negedge rst_i) begin if(!rst_i) load_o <= 1'b1; else case(currentstate) Init1,s2,s4,s6,s8,s10,s12,s14,s16,s18,s21: begin load_o <= 1'b0; delaydisp(20); end //送数的时候处于低 default: load_o <= 1'b1; //非送数时候，拉高 锁存数据 endcase end endmodule
复制代码大侠看看，哪里有问题？谢谢！
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