add commented-out code to send an "ok" after break on rs232

[fleet.git] / src / edu / berkeley / fleet / fpga / main.v

diff --git a/src/edu/berkeley/fleet/fpga/main.v b/src/edu/berkeley/fleet/fpga/main.v
index 05b66ee..ead2c40 100644 (file)
--- a/src/edu/berkeley/fleet/fpga/main.v
+++ b/src/edu/berkeley/fleet/fpga/main.v
@@ -20,6 +20,7 @@ module main
   wire break_o;
   wire break;
   reg break_last;
+  reg send_k;                initial send_k = 0;
   wire rst;
   assign rst = sys_rst_pin;
 
@@ -60,8 +61,10 @@ module main
                     break_o,
                     break);
 
+   // break and break_o are _active high_
    always @(posedge clk) break_last <= break_o;
-   assign break = break_o && !break_last;
+   assign break      =  break_o && !break_last;
+   assign break_done = !break_o &&  break_last;
 
    reg data_to_host_write_enable_reg;
    reg data_to_fleet_read_enable_reg;
@@ -97,9 +100,17 @@ module main
      data_to_host_write_enable_reg = 0;
 /*
      if (break) begin
-       data_to_host_write_enable_reg = 1;
-       data_to_host_r <= 98;
-     end else
+       root_out_a_reg = 0;
+       data_to_host_write_enable_reg <= 0;
+/*
+     end else if (break_done) begin
+       data_to_host_write_enable_reg <= 1;
+       data_to_host_r <= 111;
+       send_k <= 1;
+     end else if (send_k) begin
+       data_to_host_write_enable_reg <= 1;
+       data_to_host_r <= 107;
+       send_k <= 0;
 */
      if (root_out_r && !root_out_a_reg && !data_to_host_full) begin
        data_to_host_write_enable_reg = 1;