cc2420interface.vhd

对cc2420无线模块的接口。接受到的数据都使用双口ROM的方式与后台核心控制部分传送。

                              end_add<=x"0d97"; 
              when x"0c" => start_add<=x"0d98";----3480
                              end_add<=x"0e0f";
              when x"0b" => start_add<=x"0e10";----3600
                              end_add<=x"0e87"; 
              when x"0a" => start_add<=x"0e88";----3720
                              end_add<=x"0eff";
              when x"09" => start_add<=x"0f00";----3840
                              end_add<=x"0f77"; 
              when x"08" => start_add<=x"0f78";----3960
                              end_add<=x"0fef";
              when x"07" => start_add<=x"0ff0";----4080
                              end_add<=x"1067"; 
              when x"06" => start_add<=x"1068";----4200
                              end_add<=x"10df"; 
              when x"05" => start_add<=x"10e0";----4320
                              end_add<=x"1157"; 
              when x"04" => start_add<=x"1158";----4440
                              end_add<=x"11cf";
              when x"03" => start_add<=x"11d0";----4560
                              end_add<=x"1247"; 
              when x"02" => start_add<=x"1248";----4680
                              end_add<=x"12bf"; 
              when x"01" => start_add<=x"12c0";----4800
                               end_add<=x"1337";
              when others => start_add<=x"0000"; 
                               end_add<=x"1338";
              end case;   
           end if;
      
       
       when fifo_w_st2 =>
            state_num<=x"08";
            fifo_w_delay_set<='1';
            fifo_w_set_flag<='0'; 
            if fifo_w_count<=1015 and fifo_w_count>=0 then----------------
               csn_buf<='0';
               si_buf<=fifo_w_buf(fifo_w_count);
            elsif fifo_w_count>=1015 then
               csn_buf<='1';
            end if;
            if fifo_w_count=0 then
               fifo_w_flag<='1';
            else fifo_w_flag<='0';
            end if; 
         
       when fifo_w_st3 =>
            state_num<=x"09";
            fifo_w_end_delay_set_flag<='0';
            if fifo_frame_num>=x"01" and fifo_frame_num<=x"29" then
               if fifo_w_end_delay_count=20 then
               fifo_frame_num<=fifo_frame_num-1;
               else null;
               end if;
            else null;
            end if;
            if fifo_w_end_delay_count=0 then
               fifo_w_end_delay_flag<='1';
               csn_buf<='1';
            else fifo_w_end_delay_flag<='0';
                 csn_buf<='0';
            end if;          
         
       when fifo_w_st4 =>---------------------------
            state_num<=x"0a";
            csn_buf<='1';
            main_buf(1023 downto 1016)<=x"04";
            fifo_w_jump_delay_set_flag<='0';
            if fifo_frame_num=x"00" then
               send_finished<='1';
            elsif fifo_frame_num>=x"00" then
               send_finished<='0';
            end if;
            if fifo_w_jump_delay_count<=0 then
               fifo_w_jump_delay_flag<='1';               
            else fifo_w_jump_delay_flag<='0';
            end if;    
----------------------------------------------------------------
       when initial_st1=>
            state_num<=x"0b";
            if reset='1' then
            csn_buf<='1';
            command_strobe_num<=4;------------------------------------------
            register_num<=10;
            initial_active<='1';
            else null;
            end if;

       when initial_st2=>
            state_num<=x"0c";
            initial_active<='1';
            csn_buf<='1';
            case command_strobe_num is
           when 4=>
                main_buf(1023 downto 1016)<=x"01";--------------------------
           when 3=>
                main_buf(1023 downto 1016)<=x"01";-----------------------------
           when 2=>   
                main_buf(1023 downto 1016)<=x"01";---------------------------- 
           when 1=>   
                main_buf(1023 downto 1016)<=x"03";------------------------           
			  when others=>
                null;------------------------------------------------------
           end case;

       when initial_st3=>
            state_num<=x"0d";
            csn_buf<='1';
            initial_active<='1';
            if command_strobe_num>=1 then
            command_strobe_num<=command_strobe_num-1;
            end if;

       when initial_st4=>
            state_num<=x"0e";
            csn_buf<='1';
            initial_active<='1';
            case register_num is
                 when 10 =>main_buf(1023 downto 1000)<=x"10f800";----------main -----------------------------
                 when 9 =>main_buf(1023 downto 1000)<=x"1102c2";--------------------------------------------
                 when 8 =>main_buf(1023 downto 1000)<=x"1c007f";-----------FIFOP----------------------------
                 when 7 =>main_buf(1023 downto 1000)<=x"1901c4";--------------------------------------------
                 when 6 =>main_buf(1023 downto 1000)<=x"184165";--------------------------------------------
                 when 5 =>main_buf(1023 downto 1000)<=x"184165";--------------------------------------------
                 when 4 =>main_buf(1023 downto 1000)<=x"1102c2";
			     when 3 =>main_buf(1023 downto 1000)<=x"1c007f";
			     when 2 =>main_buf(1023 downto 1000)<=x"1901c4";
				 when 1 =>main_buf(1023 downto 1000)<=x"000003";
                 when others =>null;
            end case;
 
       when initial_st5=>
            state_num<=x"0f";
            csn_buf<='1';
            initial_active<='1';
            if register_num>=0 then
               register_num<=register_num-1; 
            end if;
 
       when initial_st6=>
            state_num<=x"10";
            csn_buf<='1';
            initial_active<='0';
            fifo_w_delay_set<='1';
            fifo_r_delay_set_flag<='1';

       when fifo_r_st1=>
            state_num<=x"11";
            csn_buf<='1';
            fifo_r_delay_set_flag<='0';
        --    fifo_r_end_delay_flag<='1';
            if fifo_r_delay_count=0 then
               fifo_r_delay_flag<='1';
            elsif fifo_r_delay_count>=1 then
               fifo_r_delay_flag<='0';           
            end if;

       when fifo_r_st2=>-------------------------
            state_num<=x"12";
            csn_buf<='1';
            fifo_r_buf1<=x"7f";---------------------------
            command_end_delay_flag<='1';    
            command_end_delay_set_flag<='1'; 
            command_w_flag<='1';             
            command_w_set_flag<='1';         
            register_end_delay_flag <='1';   
            register_end_delay_set_flag<='1';
            register_w_flag<='1';            
            register_w_set_flag<='1';        
            fifo_w_end_delay_flag<='1';      
            fifo_w_end_delay_set_flag<='1';  
            fifo_w_flag<='1';                
            fifo_w_set_flag<='1';            
            fifo_w_delay_flag<='1';          
            fifo_w_delay_set<='1';           
            fifo_w_jump_delay_flag<='1';     
            fifo_w_jump_delay_set_flag<='1'; 
            fifo_r_flag<='1';               
            fifo_r_set_flag<='1';  
            fifo_r_flag1<='1';               
            fifo_r_set_flag1<='1';           
            fifo_r_delay_flag<='1';          
            fifo_r_delay_set_flag<='1';
            
            if write_fifo='1' then
             fifo_frame_num<=x"29";
            end if; 
            
               

      when fifo_r_st3=>
           state_num<=x"13";
           fifo_r_set_flag1<='0';
           if fifo_r_count1<=8 and fifo_r_count1>=1 then
              si_buf<=fifo_r_buf1(fifo_r_count1-1);
           end if;
           if fifo_r_count1<=8 or fifo_r_count1=0  then
              csn_buf<='0';
           else csn_buf<='1';
           end if;
           if fifo_r_count1=0 then
              fifo_r_flag1<='1';
           else fifo_r_flag1<='0';
           end if;

       when fifo_r_st4=>
           state_num<=x"14";
           fifo_r_set_flag<='0';
           if fifo_r_count<=124 and fifo_r_count>=1 then
              fifo_r_buf(fifo_r_count-1)<=so_buf;
              --test2<=fifo_r_buf(fifo_r_count-1);
           end if;
           if fifo_r_count=0 then
              csn_buf<='1';
              fifo_r_flag<='1';
				  read_fifo_finished<='1';	   
           elsif fifo_r_count>=0 then
              csn_buf<='0';
              fifo_r_flag<='0';
				  read_fifo_finished<='0';
           end if;
           
        when fifo_r_st5=>
		      state_num<=x"00";
            send_to_buf_finished<='1';
            si_buf<='0';
           
      when others=>csn_buf<='1';
 end case;
end if;
end process state_behav;
	-----------------------------------------------------------------
	-----------------------------------------------------------------


addr_write: process(fifo_w_delay_count,mainclk)
      begin
 if rising_edge(mainclk) then
        case fifo_w_delay_count is
             when 5000 => start_add_buf<=start_add(12 downto 0);
             when 4999 => ram_addr_buf<=start_add_buf;
             when 4998 => ram_addr_buf<=ram_addr_buf;
             when 4997 => ram_data_buf<=ram_data;
             when 4996 => ram_data_buf<=ram_data_buf;
             when 4995 => fifo_w_buf_in(959 downto 952)<=ram_data_buf;

             when 4994 => ram_addr_buf<=start_add_buf+1;
             when 4993 => ram_addr_buf<=start_add_buf+1;
             when 4992 => ram_data_buf<=ram_data;
             when 4991 => ram_data_buf<=ram_data_buf;
             when 4990 => fifo_w_buf_in(951 downto 944)<=ram_data_buf;

             when 4989 => ram_addr_buf<=start_add_buf+2;
             when 4988 => ram_addr_buf<=ram_addr_buf;
             when 4987 => ram_data_buf<=ram_data;
             when 4986 => ram_data_buf<=ram_data_buf;
             when 4985 => fifo_w_buf_in(943 downto 936)<=ram_data_buf;

             when 4984 => ram_addr_buf<=start_add_buf+3;
             when 4983 => ram_addr_buf<=ram_addr_buf;
             when 4982 => ram_data_buf<=ram_data;
             when 4981 => ram_data_buf<=ram_data_buf;
             when 4980 => fifo_w_buf_in(935 downto 928)<=ram_data_buf;

             when 4979 => ram_addr_buf<=start_add_buf+4;
             when 4978 => ram_addr_buf<=ram_addr_buf;
             when 4977 => ram_data_buf<=ram_data;
             when 4976 => ram_data_buf<=ram_data_buf;
             when 4975 => fifo_w_buf_in(927 downto 920)<=ram_data_buf;

             when 4974 => ram_addr_buf<=start_add_buf+5;
             when 4973 => ram_addr_buf<=start_add_buf+5;
             when 4972 => ram_data_buf<=ram_data;
             when 4971 => ram_data_buf<=ram_data_buf;
             when 4970 => fifo_w_buf_in(919 downto 912)<=ram_data_buf;

             when 4969 => ram_addr_buf<=start_add_buf+6;
             when 4968 => ram_addr_buf<=ram_addr_buf;
             when 4967 => ram_data_buf<=ram_data;
             when 4966 => ram_data_buf<=ram_data_buf;
             when 4965 => fifo_w_buf_in(911 downto 904)<=ram_data_buf;

             when 4964 => ram_addr_buf<=start_add_buf+7;
             when 4963 => ram_addr_buf<=ram_addr_buf;
             when 4962 => ram_data_buf<=ram_data;
             when 4961 => ram_data_buf<=ram_data_buf;
             when 4960 => fifo_w_buf_in(903 downto 896)<=ram_data_buf;

             when 4959 => ram_addr_buf<=start_add_buf+8;
             when 4958 => ram_addr_buf<=ram_addr_buf;
             when 4957 => ram_data_buf<=ram_data;
             when 4956 => ram_data_buf<=ram_data_buf;
             when 4955 => fifo_w_buf_in(895 downto 888)<=ram_data_buf;

             when 4954 => ram_addr_buf<=start_add_buf+9;
             when 4953 => ram_addr_buf<=start_add_buf+9;
             when 4952 => ram_data_buf<=ram_data;
             when 4951 => ram_data_buf<=ram_data_buf;
             when 4950 => fifo_w_buf_in(887 downto 880)<=ram_data_buf;

             when 4949 => ram_addr_buf<=start_add_buf+10;
             when 4948 => ram_addr_buf<=ram_addr_buf;
             when 4947 => ram_data_buf<=ram_data;
             when 4946 => ram_data_buf<=ram_data_buf;
             when 4945 => fifo_w_buf_in(879 downto 872)<=ram_data_buf;

             when 4944 => ram_addr_buf<=start_add_buf+11;