switch from 33mhz clock to 100mhz clock

[fleet.git] / ships / Debug.ship

diff --git a/ships/Debug.ship b/ships/Debug.ship
index 549633c..5a9e58b 100644 (file)
--- a/ships/Debug.ship
+++ b/ships/Debug.ship
@@ -63,10 +63,15 @@ public void service() {
   wire break;
   wire uart_cts;
   assign uart_cts = 0;
-  assign rst_out = rst_in && !break;
-
-  sasc_brg sasc_brg(clk, rst_in, 3, 65, sio_ce, sio_ce_x4);
-  sasc_top sasc_top(clk, rst_in,
+  assign rst_out = rst_in || break;
+
+  // fst=3 means clock divider is 3+2=5 for a 50Mhz clock => 10Mhz
+  // using a 33Mhz clock,
+  //   33.333Mhz / 38400hz * 4 = 217.013 => 215+2,1 => 215,1
+  // using a 100Mhz clock,
+  //   100Mhz / 38400hz * 4 = 651.039 => 215+2,3 => 215,3
+  sasc_brg sasc_brg(clk, !rst_in, 215, 3, sio_ce, sio_ce_x4);
+  sasc_top sasc_top(clk, !rst_in,
                     uart_in,
                     uart_out,
                     uart_cts,
@@ -89,13 +94,12 @@ public void service() {
 
    // fpga -> host
    always @(posedge clk) begin
-     if (!rst) begin
+     if (rst) begin
        count_in  <= 0;
        count_out <= 0;
        `reset
      end else begin
 
-       `flush
        `cleanup
 
        // fpga -> host
@@ -112,10 +116,10 @@ public void service() {
        end else if (count_out==0 && `in_full) begin
          `drain_in
          data_to_host_full_word <= in_d;
-         count_out <= 6;
+         count_out <= 8;
        end else if (count_out!=0 && !data_to_host_full && !data_to_host_write_enable) begin
-         data_to_host <= data_to_host_full_word[7:0];
-         data_to_host_full_word <= (data_to_host_full_word >> 8);
+         data_to_host <= { 2'b0, data_to_host_full_word[5:0] };
+         data_to_host_full_word <= (data_to_host_full_word >> 6);
          data_to_host_write_enable <= 1;
          count_out <= count_out-1;
        end
@@ -123,9 +127,9 @@ public void service() {
        // host -> fpga
        data_to_fleet_read_enable <= 0;
        if (!data_to_fleet_empty && `out_empty && !data_to_fleet_read_enable) begin
-         out_d <= { out_d[41:0], data_to_fleet[7:0] };
+         out_d <= { out_d[43:0], data_to_fleet[5:0] };
          data_to_fleet_read_enable <= 1;
-         if (count_in==7) begin
+         if (count_in==9) begin
            count_in <= 0;
            `fill_out
          end else begin
@@ -136,6 +140,59 @@ public void service() {
     end
   end
 
+== UCF =================================================================
+
+Net clk_pin LOC=AH15;
+Net clk_pin  PERIOD = 10 ns HIGH 50%;  # 100Mhz
+
+# 33mhz clock
+#Net clk_pin LOC=AH17;
+#Net clk_pin TNM_NET = clk_pin;
+#TIMESPEC TS_clk_pin = PERIOD clk_pin 30 ns HIGH 50%;  # 33Mhz
+
+Net rst_pin LOC=E9;
+Net rst_pin PULLUP;
+Net rst_pin TIG;
+
+#Net uart_cts LOC=G6;
+#Net uart_cts IOSTANDARD = LVCMOS33;
+#Net uart_cts TIG;
+
+#Net uart_rts LOC=F6;
+#Net uart_rts IOSTANDARD = LVCMOS33;
+#Net uart_rts TIG;
+
+Net uart_in LOC=AG15;
+#Net uart_in IOSTANDARD = LVCMOS33;
+Net uart_in TIG;
+Net uart_in PULLUP;
+
+Net uart_out LOC=AG20;
+#Net uart_out IOSTANDARD = LVCMOS33;
+Net uart_out TIG;
+Net uart_out PULLUP;
+
+NET  gpio_sw_c            LOC="AJ6";   # Bank 18, Vcco=3.3V, No DCI
+
+NET  gpio_led_c           LOC="E8";    # Bank 20, Vcco=3.3V, DCI using 49.9 ohm resistors
+NET  gpio_led_e           LOC="AG23";  # Bank 2, Vcco=3.3V
+NET  gpio_led_n           LOC="AF13";  # Bank 2, Vcco=3.3V
+NET  gpio_led_s           LOC="AG12";  # Bank 2, Vcco=3.3V
+NET  gpio_led_w           LOC="AF23";  # Bank 2, Vcco=3.3V
+
+NET  gpio_led_0           LOC="H18";   # Bank 3, Vcco=2.5V, No DCI
+NET  gpio_led_1           LOC="L18";   # Bank 3, Vcco=2.5V, No DCI
+NET  gpio_led_2           LOC="G15";   # Bank 3, Vcco=2.5V, No DCI
+NET  gpio_led_3           LOC="AD26" | IOSTANDARD="LVCMOS18";  # Bank 21, Vcco=1.8V, DCI using 49.9 ohm resistors
+NET  gpio_led_4           LOC="G16";   # Bank 3, Vcco=2.5V, No DCI
+NET  gpio_led_5           LOC="AD25" | IOSTANDARD="LVCMOS18";  # Bank 21, Vcco=1.8V, DCI using 49.9 ohm resistors
+NET  gpio_led_6           LOC="AD24" | IOSTANDARD="LVCMOS18";  # Bank 21, Vcco=1.8V, DCI using 49.9 ohm resistors
+NET  gpio_led_7           LOC="AE24" | IOSTANDARD="LVCMOS18";  # Bank 21, Vcco=1.8V, DCI using 49.9 ohm resistors
+
+
+
+
+
 == Test ================================================================
 #expect 25