VHDL设计的串口通信程序

文章摘要： WHEN "101" => txd_buf <= "01100101"; "e" WHEN OTHERS => txd_buf <= "00000000";

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
                              WHEN "101" =>
                                       txd_buf <= "01100101"; "e"  
                              WHEN OTHERS  =>
                                       txd_buf <= "00000000"; 
                             
                           END CASE;
                        END IF;
               WHEN OTHERS  =>
                        IF (clkbaud_tras = ’1’) THEN
                           state_tras <= state_tras + "0001";   
                           trasstart <= ’1’;   
                        END IF;
              
            END CASE;
         END IF;
      END IF;
 END IF;
   END PROCESS;

   PROCESS(clkbaud8x,rst)  接受PC机的数据
   BEGIN
      IF (NOT rst = ’1’) THEN
         rxd_reg1 <= ’0’;   
         rxd_reg2 <= ’0’;   
         rxd_buf <= "00000000";   
         state_rec <= "0000";   
         recstart <= ’0’;   
         recstart_tmp <= ’0’;   
      ELSE IF(clkbaud8x’EVENT AND clkbaud8x = ’1’) THEN

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