diff options
Diffstat (limited to 'hdl/main_xula2.v')
| -rw-r--r-- | hdl/main_xula2.v | 98 | 
1 files changed, 49 insertions, 49 deletions
diff --git a/hdl/main_xula2.v b/hdl/main_xula2.v index 3eba7c9..9d22c09 100644 --- a/hdl/main_xula2.v +++ b/hdl/main_xula2.v @@ -25,63 +25,63 @@ module main (      output wire flash_miso      ); -    wire reset = chan[0]; -    wire uart_rx = chan[17]; -    wire uart_tx = chan[18]; +wire reset = chan[0]; +wire uart_rx = chan[17]; +wire uart_tx = chan[18]; -    reg [22:0] throb_counter = 0; -    reg throb_led = 0; -    assign chan[10] = throb_led; +reg [22:0] throb_counter = 0; +reg throb_led = 0; +assign chan[10] = throb_led; -    wire [7:0] rx_byte; -    wire [7:0] tx_byte; -    wire uart_flag; -    simple_uart #( -        .CLOCK_DIVIDE(313) // for 12MHz clock -    ) simple_uart_inst ( -        .clk(clock_12mhz), -        .rst(reset), -        .rx(chan[17]), -        .tx(chan[18]), -        .transmit(uart_flag), -        .tx_byte(tx_byte), -        .received(uart_flag), -        .rx_byte(rx_byte), -        .is_receiving(), -        .is_transmitting(), -        .recv_error() -        ); +wire [7:0] rx_byte; +wire [7:0] tx_byte; +wire uart_flag; +simple_uart #( +    .CLOCK_DIVIDE(313) // for 12MHz clock +) simple_uart_inst ( +    .clk(clock_12mhz), +    .rst(reset), +    .rx(chan[17]), +    .tx(chan[18]), +    .transmit(uart_flag), +    .tx_byte(tx_byte), +    .received(uart_flag), +    .rx_byte(rx_byte), +    .is_receiving(), +    .is_transmitting(), +    .recv_error() +    ); -    rot13 rot13_inst ( -        .clock(clock_12mhz), -        .reset(reset), -        .in_char(rx_byte), -        .out_char(tx_byte) -        ); +rot13 rot13_inst ( +    .clock(clock_12mhz), +    .reset(reset), +    .in_char(rx_byte), +    .out_char(tx_byte) +    ); -    always @(posedge clock_12mhz) begin -        if (reset) begin -            throb_counter <= 0; -            throb_led <= 0; +always @(posedge clock_12mhz) begin +    if (reset) begin +        throb_counter <= 0; +        throb_led <= 0; +    end else begin +        if (throb_counter >= 23'd06_000_000) begin +            throb_led <= !throb_led; +            throb_counter <= 23'd0;          end else begin -            if (throb_counter >= 23'd06_000_000) begin -                throb_led <= !throb_led; -                throb_counter <= 23'd0; -            end else begin -                throb_counter <= throb_counter + 23'd1; -            end +            throb_counter <= throb_counter + 23'd1;          end      end +end -    // Tie off unused outputs -    assign microsd_cs = 1'bZ; -    assign flash_cs = 1'bZ; -    assign flash_sclk = 1'bZ; -    assign flash_mosi = 1'bZ; -    assign flash_miso = 1'bZ; +// Tie off unused outputs +assign microsd_cs = 1'bZ; +assign flash_cs = 1'bZ; +assign flash_sclk = 1'bZ; +assign flash_mosi = 1'bZ; +assign flash_miso = 1'bZ; -    // Squelch unused input warnings -    (* KEEP="TRUE" *) wire dummy; -    assign dummy =& {chan[31:0], chan_clk}; +// Squelch unused input warnings +(* KEEP="TRUE" *) wire dummy; +assign dummy =& {chan[31:0], chan_clk};  endmodule  | 
