finish

readme.md

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+## FPGA 呼吸灯

rtl/breath_led.v

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+//新的计数器设计
+module breath_led(
+    input   wire         sys_clk     ,
+    input   wire         sys_rst_n   ,
+
+    output  wire  [3: 0] led 
+);
+parameter MAX_1US = 6'd50,
+          MAX_1MS = 10'd1000,
+          MAX_1S  = 10'd1000;
+reg [5: 0] cnt_us;
+wire       add_cnt_us;
+wire       end_cnt_us;
+
+reg [9: 0] cnt_ms;
+wire       add_cnt_ms;
+wire       end_cnt_ms;
+
+reg [9: 0] cnt_s;
+wire       add_cnt_s;
+wire       end_cnt_s;
+
+reg        flag;
+always @(posedge sys_clk or negedge sys_rst_n) begin
+    if(!sys_rst_n)begin
+        cnt_us <= 6'd0;
+    end 
+    else if(add_cnt_us)begin
+        if(end_cnt_us)begin
+            cnt_us <= 6'd0;            
+        end 
+        else begin
+            cnt_us <= cnt_us + 1'd1;
+        end 
+    end 
+    else begin
+        cnt_us <= cnt_us;
+    end 
+end
+assign add_cnt_us = 1'b1;
+assign end_cnt_us = add_cnt_us && cnt_us == MAX_1US - 1'd1;
+
+always @(posedge sys_clk or negedge sys_rst_n)begin
+    if(!sys_rst_n)begin
+        cnt_ms <= 10'd0;
+    end 
+    else if(add_cnt_ms)begin
+        if(end_cnt_ms)begin
+            cnt_ms <= 10'd0;
+        end 
+        else begin
+            cnt_ms <= cnt_ms + 1'd1;
+        end 
+    end 
+    else begin
+        cnt_ms <= cnt_ms;
+    end 
+end 
+assign add_cnt_ms = end_cnt_us;
+assign end_cnt_ms = add_cnt_ms && cnt_ms == MAX_1MS - 1'd1;
+
+always @(posedge sys_clk or negedge sys_rst_n)begin
+    if(!sys_rst_n)begin
+        cnt_s <= 10'd0;
+    end 
+    else if(add_cnt_s)begin
+        if(end_cnt_s)begin
+            cnt_s <= 10'd0;
+        end 
+        else begin
+            cnt_s <= cnt_s + 1'd1;
+        end 
+    end 
+    else begin
+        cnt_s <= cnt_s;
+    end 
+end 
+assign add_cnt_s = end_cnt_ms;
+assign end_cnt_s = add_cnt_s && cnt_s == MAX_1S - 1'd1;
+
+always @(posedge sys_clk or negedge sys_rst_n)begin
+    if(!sys_rst_n)begin
+        flag <= 1'b0;
+    end 
+    else if(end_cnt_s)begin
+        flag <= ~flag;
+    end 
+    else begin
+        flag <= flag;
+    end 
+end 
+assign led = (flag == 1'b0) ? {4{cnt_ms > cnt_s}}: {4{cnt_ms < cnt_s}};
+
+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[0]
+
+#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
+
+
+
+