X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/a85b19a7c7e7fecb4e71c41b37fb30dabaf8bd14..74610a872e3bead82589e6ea786e928f319540e4:/Uart.v diff --git a/Uart.v b/Uart.v index a036c64..f9d71f4 100644 --- a/Uart.v +++ b/Uart.v @@ -1,5 +1,5 @@ `define IN_CLK 8388608 -`define OUT_CLK 9600 +`define OUT_CLK 57600 `define CLK_DIV `IN_CLK / `OUT_CLK `define MMAP_ADDR 16'hFF50 @@ -9,7 +9,7 @@ module UART( input rd, input [15:0] addr, inout [7:0] data, - output reg serial); + output reg serial = 1); wire decode = (addr == `MMAP_ADDR); @@ -19,17 +19,16 @@ module UART( reg [7:0] data_stor = 0; reg [15:0] clkdiv = 0; reg have_data = 0; - reg data_end = 0; reg [3:0] diqing = 4'b0000; - wire new = (wr) && (!have_data) && decode; + wire newdata = (wr) && (!have_data) && decode; assign odata = have_data ? 8'b1 : 8'b0; - always @ (negedge clk) + always @ (posedge clk) begin /* deal with diqing */ - if(new) begin + if(newdata) begin data_stor <= data; have_data <= 1; diqing <= 4'b0000; @@ -53,7 +52,7 @@ module UART( end /* deal with clkdiv */ - if((new && !have_data) || clkdiv == `CLK_DIV) + if((newdata && !have_data) || clkdiv == `CLK_DIV) clkdiv <= 0; else clkdiv <= clkdiv + 1;