tumee
Member level 1
Hello every one.
I have same problem about below tx code.
Here is a verilog uart transmit code.
Here I can send only one character to computer via rs232. In below code can send only 'X' char.
I need to send word by word to computer.
Please help.
I have same problem about below tx code.
Here is a verilog uart transmit code.
Here I can send only one character to computer via rs232. In below code can send only 'X' char.
I need to send word by word to computer.
Please help.
| module TX ( pin_clk, // external 12M global clock pin_key, // KEY0, KEY1 key input pin_txd // Serial UART transmitter ); /********************** Port type definition *******************/ input pin_clk; input [1:0] pin_key; output pin_txd; /********************** Internal variable definitions **********/ reg [10:0] tx_baud; // Send Baud Rate Timer reg [9:0] tx_buff; // Transmit buffer reg [10:0] send_data; wire rst; // Reset /***************************************************************/ assign rst = ~pin_key[0]; // Global reset signal (F1 key) /* Transmit baud rate */ always @ (posedge pin_clk or posedge rst) if (rst ==1'b1) tx_baud <= 11'h000; else if (tx_baud == 11'h4e1) tx_baud <= 11'h000; else tx_baud <= tx_baud + 1'b1; /************** Shift register transmitted once ****************/ always @(posedge pin_clk or posedge rst) if (rst ==1'b1) tx_buff <= (send_data << 2) | 10'b0000000001; else if (tx_baud == 11'h4e1) begin tx_buff[0] <= tx_buff[1]; tx_buff[1] <= tx_buff[2]; tx_buff[2] <= tx_buff[3]; tx_buff[3] <= tx_buff[4]; tx_buff[4] <= tx_buff[5]; tx_buff[5] <= tx_buff[6]; tx_buff[6] <= tx_buff[7]; tx_buff[7] <= tx_buff[8]; tx_buff[8] <= tx_buff[9]; tx_buff[9] <= 1'b1; end assign pin_txd = tx_buff[0]; always @ (posedge pin_clk or posedge rst) begin send_data <= "X"; end /****************** End module *******************/ endmodule |