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温度计 [2017/03/13 14:40] zhijun |
温度计 [2017/03/13 14:52] zhijun |
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| {{ ::lcd1602引脚定义.png?400 |}} | {{ ::lcd1602引脚定义.png?400 |}} | ||
| - | =====四、Verilog实现===== | + | =====四、Verilog代码===== |
| + | ====1.Verilog代码:LCD1602显示部分==== | ||
| + | ------ | ||
| + | <code verilog> | ||
| + | |||
| + | // -------------------------------------------------------------------- | ||
| + | // >>>>>>>>>>>>>>>>>>>>>>>>> COPYRIGHT NOTICE <<<<<<<<<<<<<<<<<<<<<<<<< | ||
| + | // -------------------------------------------------------------------- | ||
| + | // Module:LCD1602 | ||
| + | // | ||
| + | // Author: STEP | ||
| + | // | ||
| + | // Description: Display the temperature by LCD1602 | ||
| + | // | ||
| + | // Web: www.stepfpga.com | ||
| + | // | ||
| + | // -------------------------------------------------------------------- | ||
| + | // Code Revision History : | ||
| + | // -------------------------------------------------------------------- | ||
| + | // Version: |Mod. Date: |Changes Made: | ||
| + | // V1.0 |2017.3.8 |Initial ver | ||
| + | // -------------------------------------------------------------------- | ||
| + | |||
| + | module LCD_1602(clk,LCD_EN,RS,RW,DB8,one_wire,rst); | ||
| + | |||
| + | input clk,rst; //系统时钟与复位，系统时钟==12M | ||
| + | output LCD_EN; //LCD_EN为LCD模块的使能信号（下降沿触发） | ||
| + | output RS; //RS=0时为写指令；RS=1时为写数据 | ||
| + | output RW; //RW=0时对LCD模块执行写操作；RW=1时对LCD模块执行读操作 | ||
| + | output [7:0] DB8; //8位指令或数据总线 | ||
| + | inout one_wire; //例化DS18B20模块单总线 | ||
| + | |||
| + | reg RS; | ||
| + | reg LCD_EN_Sel; | ||
| + | reg [7:0] DB8; | ||
| + | reg [127:0] data_row1; | ||
| + | reg [127:0] data_row2; | ||
| + | |||
| + | reg [7:0] result_unit; | ||
| + | reg [7:0] result_decade; | ||
| + | reg [7:0] result_hundred; | ||
| + | reg [7:0] result_dec; | ||
| + | reg [7:0] result_dec2; | ||
| + | reg [7:0] result_dec3; | ||
| + | reg [7:0] result_dec4; | ||
| + | reg [7:0] sign; | ||
| + | |||
| + | reg [3:0] num_unit; | ||
| + | reg [3:0] num_decade; | ||
| + | reg [3:0] num_hundred; | ||
| + | reg [3:0] num_dec; | ||
| + | reg [3:0] num_dec2; | ||
| + | reg [3:0] num_dec3; | ||
| + | reg [3:0] num_dec4; //若想显示小数点第四位，添加至显示内容并调整即可 | ||
| + | |||
| + | reg[19:0] cnt_ref; //LCD1602更新计数器 | ||
| + | reg ref; //更新标志位 | ||
| + | |||
| + | always@(posedge clk_2ms) //产生LCD1602更新所需信号 | ||
| + | begin | ||
| + | if(cnt_ref==220) | ||
| + | begin | ||
| + | cnt_ref<=0; | ||
| + | ref<=1; | ||
| + | ref<=0; | ||
| + | end | ||
| + | else | ||
| + | begin | ||
| + | cnt_ref<=cnt_ref+1; | ||
| + | ref<=1; | ||
| + | end | ||
| + | end | ||
| + | |||
| + | always@(*) //1602输入数据接口处理 | ||
| + | begin | ||
| + | case(num_unit) //个位 | ||
| + | 4'd0:result_unit<=8'b00110000; | ||
| + | 4'd1:result_unit<=8'b00110001; | ||
| + | 4'd2:result_unit<=8'b00110010; | ||
| + | 4'd3:result_unit<=8'b00110011; | ||
| + | 4'd4:result_unit<=8'b00110100; | ||
| + | 4'd5:result_unit<=8'b00110101; | ||
| + | 4'd6:result_unit<=8'b00110110; | ||
| + | 4'd7:result_unit<=8'b00110111; | ||
| + | 4'd8:result_unit<=8'b00111000; | ||
| + | 4'd9:result_unit<=8'b00111001; | ||
| + | default:result_unit<=result_unit; | ||
| + | endcase | ||
| + | |||
| + | case(num_decade) //十位 | ||
| + | 4'd0:result_decade<=8'b00110000; | ||
| + | 4'd1:result_decade<=8'b00110001; | ||
| + | 4'd2:result_decade<=8'b00110010; | ||
| + | 4'd3:result_decade<=8'b00110011; | ||
| + | 4'd4:result_decade<=8'b00110100; | ||
| + | 4'd5:result_decade<=8'b00110101; | ||
| + | 4'd6:result_decade<=8'b00110110; | ||
| + | 4'd7:result_decade<=8'b00110111; | ||
| + | 4'd8:result_decade<=8'b00111000; | ||
| + | 4'd9:result_decade<=8'b00111001; | ||
| + | default:result_decade<=result_decade; | ||
| + | endcase | ||
| + | |||
| + | case(num_hundred) //百位 | ||
| + | 4'd0:result_hundred<=8'b00110000; | ||
| + | 4'd1:result_hundred<=8'b00110001; | ||
| + | 4'd2:result_hundred<=8'b00110010; | ||
| + | 4'd3:result_hundred<=8'b00110011; | ||
| + | 4'd4:result_hundred<=8'b00110100; | ||
| + | 4'd5:result_hundred<=8'b00110101; | ||
| + | 4'd6:result_hundred<=8'b00110110; | ||
| + | 4'd7:result_hundred<=8'b00110111; | ||
| + | 4'd8:result_hundred<=8'b00111000; | ||
| + | 4'd9:result_hundred<=8'b00111001; | ||
| + | default:result_hundred<=result_hundred; | ||
| + | endcase | ||
| + | |||
| + | case(num_dec) //小数位 | ||
| + | 4'd0:result_dec<=8'b00110000; | ||
| + | 4'd1:result_dec<=8'b00110001; | ||
| + | 4'd2:result_dec<=8'b00110010; | ||
| + | 4'd3:result_dec<=8'b00110011; | ||
| + | 4'd4:result_dec<=8'b00110100; | ||
| + | 4'd5:result_dec<=8'b00110101; | ||
| + | 4'd6:result_dec<=8'b00110110; | ||
| + | 4'd7:result_dec<=8'b00110111; | ||
| + | 4'd8:result_dec<=8'b00111000; | ||
| + | 4'd9:result_dec<=8'b00111001; | ||
| + | default:result_dec<=result_dec; | ||
| + | endcase | ||
| + | |||
| + | case(num_dec4) //小数位 | ||
| + | 4'd0:result_dec4<=8'b00110000; | ||
| + | 4'd1:result_dec4<=8'b00110001; | ||
| + | 4'd2:result_dec4<=8'b00110010; | ||
| + | 4'd3:result_dec4<=8'b00110011; | ||
| + | 4'd4:result_dec4<=8'b00110100; | ||
| + | 4'd5:result_dec4<=8'b00110101; | ||
| + | 4'd6:result_dec4<=8'b00110110; | ||
| + | 4'd7:result_dec4<=8'b00110111; | ||
| + | 4'd8:result_dec4<=8'b00111000; | ||
| + | 4'd9:result_dec4<=8'b00111001; | ||
| + | default:result_dec4<=result_dec4; | ||
| + | endcase | ||
| + | |||
| + | case(num_dec2) //小数位 | ||
| + | 4'd0:result_dec2<=8'b00110000; | ||
| + | 4'd1:result_dec2<=8'b00110001; | ||
| + | 4'd2:result_dec2<=8'b00110010; | ||
| + | 4'd3:result_dec2<=8'b00110011; | ||
| + | 4'd4:result_dec2<=8'b00110100; | ||
| + | 4'd5:result_dec2<=8'b00110101; | ||
| + | 4'd6:result_dec2<=8'b00110110; | ||
| + | 4'd7:result_dec2<=8'b00110111; | ||
| + | 4'd8:result_dec2<=8'b00111000; | ||
| + | 4'd9:result_dec2<=8'b00111001; | ||
| + | default:result_dec2<=result_dec2; | ||
| + | endcase | ||
| + | |||
| + | case(num_dec3) //小数位 | ||
| + | 4'd0:result_dec3<=8'b00110000; | ||
| + | 4'd1:result_dec3<=8'b00110001; | ||
| + | 4'd2:result_dec3<=8'b00110010; | ||
| + | 4'd3:result_dec3<=8'b00110011; | ||
| + | 4'd4:result_dec3<=8'b00110100; | ||
| + | 4'd5:result_dec3<=8'b00110101; | ||
| + | 4'd6:result_dec3<=8'b00110110; | ||
| + | 4'd7:result_dec3<=8'b00110111; | ||
| + | 4'd8:result_dec3<=8'b00111000; | ||
| + | 4'd9:result_dec3<=8'b00111001; | ||
| + | default:result_dec3<=result_dec3; | ||
| + | endcase | ||
| + | end | ||
| + | |||
| + | |||
| + | //-------------------------------------// | ||
| + | //输入时钟12MHz 输出周期2ms | ||
| + | //division12MHz_2ms.v | ||
| + | reg [15:0]count; | ||
| + | reg clk_2ms; | ||
| + | always @ (posedge clk) | ||
| + | begin | ||
| + | if(count == 16'd12_000) | ||
| + | begin | ||
| + | count <= 16'b1; | ||
| + | clk_2ms <= ~clk_2ms; | ||
| + | end | ||
| + | else | ||
| + | count <= count + 1'b1; | ||
| + | end | ||
| + | //---------------------------------------// | ||
| + | |||
| + | reg [127:0] Data_Buf; //液晶显示的数据缓存 | ||
| + | reg [4:0] disp_count; | ||
| + | reg [3:0] state; //状态机 | ||
| + | |||
| + | parameter Clear_Lcd = 4'b0000; //清屏并光标复位 | ||
| + | parameter Set_Disp_Mode = 4'b0001; //设置显示模式：8位2行5x7点阵 | ||
| + | parameter Disp_On = 4'b0010; //显示器开、光标不显示、光标不允许闪烁 | ||
| + | parameter Shift_Down = 4'b0011; //文字不动，光标自动右移 | ||
| + | parameter Write_Addr = 4'b0100; //写入显示起始地址 | ||
| + | parameter Write_Data_First = 4'b0101; //写入第一行显示的数据 | ||
| + | parameter Write_Data_Second = 4'b0110; //写入第二行显示的数据 | ||
| + | assign RW = 1'b0; //RW=0时对LCD模块执行写操作(一直保持写状态） | ||
| + | assign LCD_EN = LCD_EN_Sel ? clk_2ms : 1'b0; //通过LCD_EN_Sel信号来控制LCD_EN的开启与关闭 | ||
| + | |||
| + | |||
| + | //--------------------------------显示模块----------------------------// | ||
| + | always @(posedge clk_2ms or negedge rst or negedge ref) | ||
| + | begin | ||
| + | //-----------------------复位并更新显示数据--------------------// | ||
| + | |||
| + | if(!rst || !ref) | ||
| + | begin | ||
| + | state <= Clear_Lcd; //复位：清屏并光标复位 | ||
| + | RS <= 1'b1; //复位：RS=1时为读指令； | ||
| + | DB8 <= 8'b0; //复位：使DB8总线输出全0 | ||
| + | LCD_EN_Sel <= 1'b0; //复位：关夜晶使能信号 | ||
| + | disp_count <= 5'b0; | ||
| + | data_row1 <= { //输入第一行要显示的数据 | ||
| + | 8'b01010011, //S | ||
| + | 8'b01010100, //T | ||
| + | 8'b01000101, //E | ||
| + | 8'b01010000, //P | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b01000110, //F | ||
| + | 8'b01010000, //P | ||
| + | 8'b01000111, //G | ||
| + | 8'b01000001, //A | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b00100000 //SPACE | ||
| + | }; | ||
| + | data_row2 <= { 8'b00100000, //输入第二行要显示的数据 | ||
| + | 8'b00100000, //SPACE | ||
| + | 8'b01010100, //T | ||
| + | 8'b01100101, //e | ||
| + | 8'b01101101, //m | ||
| + | 8'b00111010, //冒号 | ||
| + | sign, | ||
| + | result_unit, | ||
| + | result_decade, | ||
| + | result_hundred, | ||
| + | 8'b00101110, //. | ||
| + | result_dec, | ||
| + | result_dec2, | ||
| + | result_dec3, | ||
| + | 8'hdf, //℃ | ||
| + | 8'b01000011 | ||
| + | |||
| + | }; | ||
| + | end | ||
| + | else | ||
| + | begin | ||
| + | case(state) | ||
| + | //-------------------------------初始化LCD------------------------------------// | ||
| + | |||
| + | Clear_Lcd : begin LCD_EN_Sel <= 1'b1; //开使能 | ||
| + | RS <= 1'b0; //写指令 | ||
| + | DB8 <= 8'b00000001; //清屏并光标复位 | ||
| + | state <= Set_Disp_Mode; end | ||
| + | Set_Disp_Mode : begin DB8 <= 8'b00111000; //设置显示模式：8位2行5x8点阵 | ||
| + | state <= Disp_On; end | ||
| + | Disp_On : begin DB8 <= 8'b00001100; //显示器开、光标不显示、光标不允许闪烁 | ||
| + | state <= Shift_Down; end | ||
| + | Shift_Down : begin DB8 <= 8'b00000110; //文字不动，光标自动右移 | ||
| + | state <= Write_Addr; end | ||
| + | | ||
| + | //---------------------------------显示循环------------------------------------// | ||
| + | |||
| + | Write_Addr : begin RS <= 1'b0; //写指令 | ||
| + | DB8 <= 8'b10000000; //写入第一行显示起始地址：第一行第1个位置 | ||
| + | Data_Buf <= data_row1; //将第一行显示的数据赋给Data_First_Buf | ||
| + | state <= Write_Data_First; end | ||
| + | Write_Data_First : begin //写第一行数据 | ||
| + | if(disp_count == 16) //disp_count等于15时表示第一行数据已写完 | ||
| + | begin | ||
| + | RS <= 1'b0; //写指令 | ||
| + | DB8 <= 8'b11000000; //送入写第二行的指令,第2行第1个位置 | ||
| + | disp_count <= 5'b0; //计数清0 | ||
| + | Data_Buf <= data_row2; //将第2行显示的数据赋给Data_First_Buf | ||
| + | state <= Write_Data_Second;end //写完第一行进入写第二行状态 | ||
| + | else //没写够16字节 | ||
| + | begin | ||
| + | RS <= 1'b1; //RS=1表示写数据 | ||
| + | DB8 <= Data_Buf[127:120]; | ||
| + | Data_Buf <= (Data_Buf << 8); | ||
| + | disp_count <= disp_count + 1'b1; | ||
| + | state <= Write_Data_First; end end | ||
| + | Write_Data_Second : begin //写第二行数据 | ||
| + | if(disp_count == 16)//数据发送完毕 | ||
| + | begin | ||
| + | RS <= 1'b0; //写指令 | ||
| + | DB8 <= 8'b10000000; //写入第一行显示起始地址：第一行第1个位置 | ||
| + | disp_count <= 5'b0; | ||
| + | state <= Write_Addr; //重新循环 | ||
| + | end | ||
| + | else | ||
| + | begin | ||
| + | RS <= 1'b1; | ||
| + | DB8 <= Data_Buf[127:120]; | ||
| + | Data_Buf <= (Data_Buf << 8); | ||
| + | disp_count <= disp_count + 1'b1; | ||
| + | state <= Write_Data_Second; | ||
| + | end end | ||
| + | //--------------------------------------------------------------------------// | ||
| + | default : state <= Clear_Lcd; //若state为其他值，则将state置为Clear_Lcd | ||
| + | endcase | ||
| + | end | ||
| + | end | ||
| + | |||
| + | //--------------------------------------------------------------------------// | ||
| + | |||
| + | |||
| + | |||
| + | wire clk_in; | ||
| + | wire rst_n_in; | ||
| + | wire [15:0] data_out; | ||
| + | wire tem_flag=data_out[15:11]?1'b0:1'b1; | ||
| + | wire [10:0] tem_code=tem_flag?data_out[10:0]:(~data_out[10:0])+1'b1; | ||
| + | wire [20:0] tem_data=tem_code*625; | ||
| + | reg [27:0] bcd_code; | ||
| + | DS18B20Z DS18B20Z_uut | ||
| + | ( | ||
| + | .one_wire(one_wire), | ||
| + | .clk_in(clk), | ||
| + | .rst_n_in(rst), | ||
| + | .data_out(data_out) | ||
| + | ); | ||
| + | |||
| + | |||
| + | |||
| + | reg [48:0] shift_reg; | ||
| + | always@(posedge clk or negedge rst)begin | ||
| + | |||
| + | shift_reg= {28'h0,tem_data}; | ||
| + | |||
| + | if(!rst) bcd_code = 0; | ||
| + | else | ||
| + | begin | ||
| + | repeat(21)//repeat B_SIZE times | ||
| + | begin | ||
| + | if (shift_reg[24:21] >= 5) shift_reg[24:21] = shift_reg[24:21] + 2'b11; | ||
| + | if (shift_reg[28:25] >= 5) shift_reg[28:25] = shift_reg[28:25] + 2'b11; | ||
| + | if (shift_reg[32:29] >= 5) shift_reg[32:29] = shift_reg[32:29] + 2'b11; | ||
| + | if (shift_reg[36:33] >= 5) shift_reg[36:33] = shift_reg[36:33] + 2'b11; | ||
| + | if (shift_reg[40:37] >= 5) shift_reg[40:37] = shift_reg[40:37] + 2'b11; | ||
| + | if (shift_reg[44:41] >= 5) shift_reg[44:41] = shift_reg[44:41] + 2'b11; | ||
| + | if (shift_reg[48:45] >= 5) shift_reg[48:45] = shift_reg[48:45] + 2'b11; | ||
| + | if (tem_flag==0) sign<=8'b00101101; | ||
| + | if (tem_flag==1) sign<=8'b00100000; | ||
| + | shift_reg = shift_reg << 1; | ||
| + | end | ||
| + | bcd_code=shift_reg[48:21]; | ||
| + | |||
| + | num_unit <= bcd_code[27:24]; | ||
| + | num_decade <= bcd_code[23:20]; | ||
| + | num_hundred<= bcd_code[19:16]; | ||
| + | num_dec <= bcd_code[15:12]; | ||
| + | num_dec2 <= bcd_code[11:8]; | ||
| + | num_dec3 <= bcd_code[7:4]; | ||
| + | num_dec4 <= bcd_code[3:0]; | ||
| + | |||
| + | |||
| + | end | ||
| + | end | ||
| + | |||
| + | |||
| + | endmodule | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | </code> | ||