finish

readme.md

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+## FPGA按键消抖
+### 普通按键消抖

rtl/key_ctrl.v

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+module key_ctrl(
+    input   wire  sys_clk   ,
+    input   wire  sys_rst_n ,
+    input   wire  key       ,
+
+    output  reg   led
+);
+always @(posedge sys_clk or negedge sys_rst_n)begin
+    if(!sys_rst_n)begin
+        led <= 1'b0;
+    end 
+    else if(key == 1'b1)begin
+        led <= ~led;
+    end 
+    else begin
+        led <= led;
+    end 
+end 
+endmodule

rtl/key_debounce.v

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+module key_debounce(
+    input   wire  sys_clk   ,
+    input   wire  sys_rst_n ,
+    input   wire  key_in    ,
+
+    output  reg   key_out
+);
+parameter MAX = 20'd999_999;
+reg [19: 0] cnt_20ms;
+always @(posedge sys_clk or negedge sys_rst_n) begin
+    if(!sys_rst_n)begin
+        cnt_20ms <= 20'd0;
+    end 
+    else if(key_in == 1'b1)begin
+        cnt_20ms <= 20'd0;
+    end 
+    else if((cnt_20ms == MAX) && (key_in == 1'b0))begin
+        cnt_20ms <= cnt_20ms;
+    end 
+    else begin
+        cnt_20ms <= cnt_20ms + 1'd1;
+    end 
+end
+
+always @(posedge sys_clk or negedge sys_rst_n)begin
+    if(!sys_rst_n)begin
+        key_out <= 1'b0;
+    end 
+    else if(cnt_20ms == MAX - 1'd1)begin
+        key_out <= 1'b1;
+    end 
+    else begin
+        key_out <= 1'b0;
+    end 
+end 
+endmodule

rtl/top.v

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+module top(
+    input  wire  sys_clk  ,
+    input  wire  sys_rst_n,
+    input  wire  key_in   ,
+
+    output wire  led 
+);
+wire key_out;
+key_debounce    key_debounce_inst(
+.sys_clk    (sys_clk),
+.sys_rst_n  (sys_rst_n),
+.key_in     (key_in),
+    
+.key_out    (key_out)
+);
+
+key_ctrl    key_ctrl_inst(
+.sys_clk    (sys_clk),
+.sys_rst_n  (sys_rst_n),
+.key        (key_out),
+    
+.led        (led)
+);
+endmodule

tcl/C4_pin.tcl

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+#引脚参数导入脚本
+#时钟、复位
+set_location_assignment PIN_E1 -to sys_clk
+set_location_assignment PIN_E15 -to sys_rst_n
+
+#UART
+#set_location_assignment PIN_M2 -to uart_rx
+#set_location_assignment PIN_G1 -to uart_tx
+
+#LED
+#set_location_assignment PIN_D16 -to led[3]
+#set_location_assignment PIN_F15 -to led[2]
+#set_location_assignment PIN_F16 -to led[1]
+set_location_assignment PIN_G15 -to led
+
+#独立按键
+# set_location_assignment PIN_M15 -to key_in[2]
+# set_location_assignment PIN_M16 -to key_in[1]
+set_location_assignment PIN_E16 -to key_in
+
+#数码管选段
+# set_location_assignment PIN_B7 -to seg_led[0]
+# set_location_assignment PIN_A8 -to seg_led[1]
+# set_location_assignment PIN_A6 -to seg_led[2]
+# set_location_assignment PIN_B5 -to seg_led[3]
+# set_location_assignment PIN_B6 -to seg_led[4]
+# set_location_assignment PIN_A7 -to seg_led[5]
+# set_location_assignment PIN_B8 -to seg_led[6]
+# set_location_assignment PIN_A5 -to seg_led[7]
+
+#数码管片选w·
+# set_location_assignment PIN_A4 -to sel_led[0]
+# set_location_assignment PIN_B4 -to sel_led[1]
+# set_location_assignment PIN_A3 -to sel_led[2]
+# set_location_assignment PIN_B3 -to sel_led[3]
+# set_location_assignment PIN_A2 -to sel_led[4]
+# set_location_assignment PIN_B1 -to sel_led[5]
+
+#ds18b20
+# set_location_assignment PIN_E6 -to dq
+
+#蜂鸣器
+#set_location_assignment PIN_J1 -to buzzer
+
+#SDRAM
+    #地址
+#set_location_assignment PIN_T8    -to addr[0]  
+#set_location_assignment PIN_P9    -to addr[1]
+#set_location_assignment PIN_T9    -to addr[2]
+#set_location_assignment PIN_R9    -to addr[3]
+#set_location_assignment PIN_L16   -to addr[4]
+#set_location_assignment PIN_L15   -to addr[5]
+#set_location_assignment PIN_N16   -to addr[6]
+#set_location_assignment PIN_N15   -to addr[7]
+#set_location_assignment PIN_P16   -to addr[8]
+#set_location_assignment PIN_P15   -to addr[9]
+#set_location_assignment PIN_R8    -to addr[10]
+#set_location_assignment PIN_R16   -to addr[11]
+#set_location_assignment PIN_T15   -to addr[12]
+    
+    #数据
+#set_location_assignment PIN_R5    -to dq[0]
+#set_location_assignment PIN_T4    -to dq[1]
+#set_location_assignment PIN_T3    -to dq[2]
+#set_location_assignment PIN_R3    -to dq[3]
+#set_location_assignment PIN_T2    -to dq[4]
+#set_location_assignment PIN_R1    -to dq[5]
+#set_location_assignment PIN_P2    -to dq[6]
+#set_location_assignment PIN_P1    -to dq[7]
+#set_location_assignment PIN_R13   -to dq[8]
+#set_location_assignment PIN_T13   -to dq[9]
+#set_location_assignment PIN_R12   -to dq[10]
+#set_location_assignment PIN_T12   -to dq[11]
+#set_location_assignment PIN_T10   -to dq[12]
+#set_location_assignment PIN_R10   -to dq[13]
+#set_location_assignment PIN_T11   -to dq[14]
+#set_location_assignment PIN_R11   -to dq[15]
+
+    #bank
+#set_location_assignment PIN_R7   -to bank[0]
+#set_location_assignment PIN_T7   -to bank[1]
+
+    #dqm
+#set_location_assignment PIN_N2    -to dqm[0]
+#set_location_assignment PIN_T14   -to dqm[1]
+    
+    #时钟
+#set_location_assignment PIN_R4    -to sdram_clk
+
+    #控制信号
+#set_location_assignment PIN_R14   -to cke
+#set_location_assignment PIN_T6    -to cs_n
+#set_location_assignment PIN_R6    -to ras_n
+#set_location_assignment PIN_T5    -to cas_n
+#set_location_assignment PIN_N1    -to we_n
+
+
+#flash
+#set_location_assignment PIN_H2    -to miso   
+#set_location_assignment PIN_C1    -to mosi
+#set_location_assignment PIN_H1    -to sclk
+#set_location_assignment PIN_D2    -to cs_n
+
+#EEPROM 
+#set_location_assignment PIN_L2 -to sda
+#set_location_assignment PIN_L1 -to sclk
+
+#VGA
+
+#摄像头
+
+
+
+