Remove repl functionality to make the serial pgm as simple as possible

1 files changed, 4 insertions, 55 deletions

diff --git a/atk16_fpga/top.v b/atk16_fpga/top.v
index 6fcbddd..07486cb 100644
--- a/atk16_fpga/top.v
+++ b/atk16_fpga/top.v
@@ -15,11 +15,8 @@ module top (
     localparam START_TX = 2;
     localparam TX_IN_PROG = 3;
     localparam WAIT_TX_DONE = 4;
-    localparam HANDLE_RX_DATA = 5;
-    localparam SEND_STRING_WELCOME = 6;
-    localparam SEND_STRING_HELP = 7;
-    localparam SEND_STRING_PROGRAM_READY = 8;
-    localparam RECEIVE_PROGRAM_DATA = 9;
+    localparam SEND_STRING_WELCOME = 5;
+    localparam RECEIVE_PROGRAM_DATA = 6;
 
     reg [7:0] state = SEND_STRING_WELCOME;
 
@@ -27,14 +24,6 @@ module top (
     `STR_welcome
     reg [7:0] welcome_index = 0;
 
-    // SEND_STRING_HELP data
-    `STR_help
-    reg [7:0] help_index = 0;
-
-    // SEND_STRING_PROGRAM_READY data
-    `STR_program_ready
-    reg [7:0] program_ready_index = 0;
-
     // Synchronous state machine with reset.
     always @(posedge SYSCLK) begin
         case (state)
@@ -72,17 +61,6 @@ module top (
                 end
             end
 
-            // STATES FOR PROCESSING DATA
-            HANDLE_RX_DATA: begin
-                if (data_rx == cmd_program) begin
-                    state <= SEND_STRING_PROGRAM_READY;
-                end else if (data_rx == cmd_help) begin
-                    state <= SEND_STRING_HELP;
-                end else begin
-                    state <= RX_START;
-                end
-            end
-
             SEND_STRING_WELCOME: begin
                 if (welcome_index < 8'd`LEN_welcome) begin
                     data_tx <= str_welcome[welcome_index];
@@ -91,32 +69,6 @@ module top (
                     state_after_tx <= SEND_STRING_WELCOME;
                 end else begin
                     welcome_index <= 0;
-                    state <= RX_START;
-                    state_after_tx <= RX_START;
-                end
-            end
-
-            SEND_STRING_HELP: begin
-                if (help_index < 8'd`LEN_help) begin
-                    data_tx <= str_help[help_index];
-                    help_index <= help_index + 1;
-                    state <= START_TX;
-                    state_after_tx <= SEND_STRING_HELP;
-                end else begin
-                    help_index <= 0;
-                    state <= RX_START;
-                    state_after_tx <= RX_START;
-                end
-            end
-
-            SEND_STRING_PROGRAM_READY: begin
-                if (program_ready_index < 8'd`LEN_program_ready) begin
-                    data_tx <= str_program_ready[program_ready_index];
-                    program_ready_index <= program_ready_index + 1;
-                    state <= START_TX;
-                    state_after_tx <= SEND_STRING_PROGRAM_READY;
-                end else begin
-                    program_ready_index <= 0;
                     state <= RECEIVE_PROGRAM_DATA;
                     state_after_tx <= RX_START;
                 end
@@ -142,9 +94,6 @@ module top (
     // State to transition to after TX done.
     reg  [7:0] state_after_tx = RX_START;
 
-    reg  [7:0] cmd_help = 8'd104;  // h
-    reg  [7:0] cmd_program = 8'd112;  // p
-
     // Instantiate the UART transmitter.
     uart_tx uart_inst (
         .clk  (SYSCLK),
@@ -156,7 +105,7 @@ module top (
 
     wire [7:0] data_rx;
     wire rx_done;
-    reg [7:0] state_after_rx = HANDLE_RX_DATA;
+    reg [7:0] state_after_rx = RECEIVE_PROGRAM_DATA;
 
     uart_rx uart_rx_inst (
         .clk (SYSCLK),
@@ -165,7 +114,7 @@ module top (
         .done(rx_done)
     );
 
-    assign LED1 = data_rx == cmd_program;
+    assign LED1 = 1;
     assign LED2 = LED1;
 
 endmodule