feat: submission

uart.py

@@ -30,4 +30,5 @@ if __name__ == '__main__':
     y = int(input('Second number: '))
     send('COM3', y)
     
-    print('output: ', readBlock('COM3'))
+    print('output: ', int.from_bytes(readBlock('COM3'), byteorder='little'))
+

uart.v

@@ -78,14 +78,15 @@ module uart(
     
     assign LEDR = LED;
     
+    /* So USB can read data. */
+    reg[31:0] delay;
     
-    /*remove*/
-    reg prev;
+    localparam second_delay = 115200; 
     
     /* Main loop */ 
     always @(posedge uart_transmitter_clock)
-    begin
-        LED <= first_byte | second_byte;
+    begin        
+        LED <= state;
         
         case (state)
             state_wait_for_first:
@@ -115,16 +116,25 @@ module uart(
             begin
                 state                   <= state_send_data;
                 uart_receiver_clear     <= 0;
+                delay                   <= second_delay;
             end
             state_send_data:
             begin
-                state               <= state_data_sent; 
-                uart_transmit_data  <= (first_byte > second_byte) ? first_byte : second_byte;
-                uart_transmit_start <= 1;
+                if (delay > 0)
+                begin
+                    delay <= delay - 1;
+                end
+                
+                if (delay == 0 && uart_transmit_ready == 1)
+                begin
+                    state               <= state_data_sent; 
+                    uart_transmit_data  <= (first_byte > second_byte) ? first_byte : second_byte;
+                    uart_transmit_start <= 1;
+                end
             end
             state_data_sent:
             begin
-                if (uart_transmit_ready)
+                if (uart_transmit_ready == 0)
                 begin
                     state               <= state_wait_for_first;
                     uart_transmit_start <= 0;