VHDL设计的串口通信程序

文章摘要： END IF; WHEN "1111" => IF (clkbaud_tras = ’1’) THEN state_tras <= state_tras + "0001"; send_state <= send_state + "001";

VHDL设计的串口通信程序,标签：eda技术,eda技术实用教程,http://www.88dzw.com
                        END IF;
               WHEN "1111" =>
                        IF (clkbaud_tras = ’1’) THEN
                           state_tras <= state_tras + "0001";   
                           send_state <= send_state + "001";   
                           trasstart <= ’0’;   
                           CASE send_state IS
                              WHEN "000" =>
                                       txd_buf <= "01100101"; "e"  
                              WHEN "001" =>
                                       txd_buf <= "01101100"; "l"  
                              WHEN "010" =>
                                       txd_buf <= "01100011";  "c" 
                              WHEN "011" =>
                                       txd_buf <= "01101111"; "o" 
                              WHEN "100" =>
                                       txd_buf <= "01101101";  "m" 

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