Индекс частоты: 0..5 → 0,10,20,30,40,50 Гц english and 1Hz

blink.v

@@ -10,25 +10,34 @@ module blink #(
 
     //---------------------------------------------------------
     // Step duration:
-    //  - for 0 Hz   : 8 s
+    //  - for 0.5 Hz : 2 s
     //  - for others : 4 s
     //---------------------------------------------------------
-    localparam integer STEP_4SEC_MAX = (F_CLK * 4) - 1;
+    localparam integer STEP_2SEC_MAX = (F_CLK * 2) - 1;
-    localparam integer STEP_8SEC_MAX = (F_CLK * 8) - 1;
+    localparam integer STEP_4SEC_MAX  = (F_CLK * 4) - 1;
 
     // Step timer counter
     reg [31:0] step_cnt = 32'd0;
 
-    // Frequency index: 0..5 → 0,10,20,30,40,50 Hz
+    // Frequency index: 0..5 → 0, 10, 20, 30, 40, 50 Hz
     reg [2:0] freq_idx = 3'd0;
 
     // Half-period counter and current half-period length in clock cycles
-    reg [31:0] blink_cnt   = 32'd0;
+    reg [31:0] blink_cnt = 32'd0;
-    reg [31:0] max_count   = 32'd0;
+    reg [31:0] max_count = 32'd0;
 
-    // Base LED signal (before output inversions)
+    // Base LED signal (before output inversion)
     reg led_base = 1'b0;
 
+    //---------------------------------------------------------
+    // 1 Hz generator for pin: divider from F_CLK
+    // Period 1 Hz = 1 s, half-period = 0.5 s
+    //---------------------------------------------------------
+    localparam integer PIN_1HZ_HALF_MAX = (F_CLK / 2) - 1;
+
+    reg [31:0] pin_cnt  = 32'd0;
+    reg        pin_base = 1'b0;
+
     //---------------------------------------------------------
     // Function to calculate half-period in clock cycles
     //---------------------------------------------------------
@@ -54,9 +63,9 @@ module blink #(
     //---------------------------------------------------------
     always @(posedge clk) begin
         //-----------------------------------------------------
-        // Step timer: change frequency every 4 or 8 seconds
+        // Step timer: change frequency every 2 or 4 seconds
         //-----------------------------------------------------
-        if (step_cnt >= (freq_idx == 3'd0 ? STEP_8SEC_MAX : STEP_4SEC_MAX)) begin
+        if (step_cnt >= (freq_idx == 3'd1 ? STEP_2SEC_MAX : STEP_4SEC_MAX)) begin
             step_cnt <= 32'd0;
 
             // Cycle through 0→1→2→3→4→5→0...
@@ -74,7 +83,7 @@ module blink #(
         max_count <= calc_max_count(freq_idx);
 
         //-----------------------------------------------------
-        // Blink generation
+        // Blink generation for led
         //-----------------------------------------------------
         if (max_count == 32'd0) begin
             // 0 Hz: hold current state, no blinking
@@ -88,16 +97,26 @@ module blink #(
                 blink_cnt <= blink_cnt + 32'd1;
             end
         end
+
+        //-----------------------------------------------------
+        // 1 Hz generation for pin (independent of freq_idx)
+        //-----------------------------------------------------
+        if (pin_cnt >= PIN_1HZ_HALF_MAX) begin
+            pin_cnt  <= 32'd0;
+            pin_base <= ~pin_base;
+        end else begin
+            pin_cnt <= pin_cnt + 32'd1;
+        end
     end
 
     //---------------------------------------------------------
     // Outputs:
-    //  led     = inverted base signal
+    //  led     = inverted base signal (variable frequency)
-    //  pin     = same as led
+    //  pin     = 1 Hz
     //  pin_10  = inverted pin
     //---------------------------------------------------------
     assign led    = ~led_base;
-    assign pin    = led;
+    assign pin    = pin_base;
-    assign pin_10 = ~pin;
+    assign pin_10 = led;
 
 endmodule