decode.v

：首先介绍了DS--UWB系统的的发射与接收模型

//--------------------------------------------------------------------------------
// Module    : decode.v
// File Name :
// Version   : 1.0
// Date      :
// Author    :
// Modify    :
// Function  :
//--------------------------------------------------------------------------------
`timescale 1ns/1ns

module decode(
    clock,
    reset,

    decode_inst_in,

    decode_aluctl_out


);

//--------------------------------------------------------------------------------
// Interface declarations
//--------------------------------------------------------------------------------
    input         clock;
    input         reset;

    input  [23:0] decode_inst_in;
 
//--------------------------------------------------------------------------------
// Interface declarations
//--------------------------------------------------------------------------------
    wire         clock;
    wire         reset;

    wire  [23:0] decode_inst_in;
 
//--------------------------------------------------------------------------------
//  Internal signal declarations
//--------------------------------------------------------------------------------
    wire  [23:0] decode_inst;

//--------------------------------------------------------------------------------
//  Parameter declarations 
//--------------------------------------------------------------------------------
    parameter REG_GROUP = 0, ACC_MEM = 1, INT_MEM = 2, EXT_MEM = 3, DPTR_MEM = 4, 
              DPTR_MEM = 5, BCC_MEM = 6, PC_ADDR = 7, SPTR_MEM = 8, NON_VAL = 9;

//--------------------------------------------------------------------------------
//  Main declarations
//--------------------------------------------------------------------------------
    assign decode_inst = decode_inst_in;

    //aulctl--control alu operation, first_opr--first operator source, second_opr--second operator source
    always @(decode_inst)
    begin
        casex (decode_inst[23:16])
            OC8051_INC_R : begin aluctl = ADD_OPR;    first_opr = REG_GROUP; second_opr = IMMD_VAL; end
            OC8051_INC_I : begin aluctl = ADD_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_INC_A : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_INC_D : begin aluctl = ADD_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_RR    : begin aluctl = SHF_RR_OPR; first_opr = ACC_MEM;   second_opr = NONE_VAL; end
            OC8051_LJMP  : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end 

            OC8051_DEC_R : begin aluctl = ADD_OPR;    first_opr = REG_GROUP; second_opr = IMMD_VAL; end
            OC8051_DEC_I : begin aluctl = ADD_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_DEC_A : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_DEC_D : begin aluctl = ADD_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_RRC   : begin aluctl = SHF_RRC_OPR;first_opr = ACC_MEM;   second_opr = NONE_VAL; end
            OC8051_LCALL : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end

            OC8051_ADD_R : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end 
            OC8051_ADD_I : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end 
            OC8051_ADD_D : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end 
            OC8051_ADD_C : begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end 
            OC8051_RL    : begin aluctl = SHF_RL_OPR; first_opr = ACC_MEM;   second_opr = NONE_VAL; end
            OC8051_RET   : begin aluctl = MOV_OPR;    first_opr = NON_MEM;   second_opr = INT_VAL;  end

            OC8051_ADDC_R: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end 
            OC8051_ADDC_I: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end 
            OC8051_ADDC_D: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end 
            OC8051_ADDC_C: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end 
            OC8051_RLC   : begin aluctl = SHF_RL_OPR; first_opr = ACC_MEM;   second_opr = NONE_VAL; end
            OC8051_RET1  : begin aluctl = MOV_OPR;    first_opr = NON_MEM;   second_opr = INT_VAL;  end
            OC8051_JNB   : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end

            OC8051_ORL_R : begin aluctl = ORL_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end
            OC8051_ORL_I : begin aluctl = ORL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_ORL_D : begin aluctl = ORL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_ORL_C : begin aluctl = ORL_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_ORL_AD: begin aluctl = ORL_OPR;    first_opr = INT_MEM;   second_opr = ACC_MEM;  end
            OC8051_ORL_CD: begin aluctl = ORL_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_JC    : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end

            OC8051_ANL_R : begin aluctl = ANL_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end
            OC8051_ANL_I : begin aluctl = ANL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_ANL_D : begin aluctl = ANL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_ANL_C : begin aluctl = ANL_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_ANL_AD: begin aluctl = ANL_OPR;    first_opr = INT_MEM;   second_opr = ACC_MEM;  end
            OC8051_ANL_CD: begin aluctl = ANL_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_JNC   : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end

            OC8051_XRL_R : begin aluctl = XRL_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end
            OC8051_XRL_I : begin aluctl = XRL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_XRL_D : begin aluctl = XRL_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_XRL_C : begin aluctl = XRL_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_XRL_AD: begin aluctl = XRL_OPR;    first_opr = INT_MEM;   second_opr = ACC_MEM;  end
            OC8051_XRL_CD: begin aluctl = XRL_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_JZ    : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end

            OC8051_MOV_CR: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_CI: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_C : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_CD: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_JMP_D : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end
            OC8051_JNZ   : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = INT_VAL;  end

            OC8051_MOV_RD: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_ID: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOVC_PC:begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_DD: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_DIV   : begin aluctl = DIV_OPR;    first_opr = ACC_MEM;   second_opr = INT_VAL;  end
            OC8051_SJMP  : begin aluctl = ADD_OPR;    first_opr = PC_MEM;    second_opr = IMMD_VAL; end

            OC8051_SUBB_R: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = REG_GROUP;end
            OC8051_SUBB_I: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_SUBB_D: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_SUBB_C: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end
            OC8051_MOV_CB: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_DP: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOVC_DP:begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end

            OC8051_MOV_DR: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_DI: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_BC: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MUL   : begin aluctl = MUL_OPR;    first_opr = ACC_VAL;   second_opr = BCC_VAL;  end
            OC8051_INC_DP: begin aluctl = ADD_OPR;    first_opr = DPTR;      second_opr = IMMD_VAL; end

            OC8051_CJNE_R: begin aluctl = ADD_OPR;    first_opr = REG_GRP;   second_opr = IMMD_VAL; end
            OC8051_CJNE_I: begin aluctl = ADD_OPR;    first_opr = INT_MEM;   second_opr = IMMD_VAL; end
            OC8051_CJNE_D: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM ; end
            OC8051_CJNE_C: begin aluctl = ADD_OPR;    first_opr = ACC_MEM;   second_opr = IMMD_VAL; end

            OC8051_XCH_R : begin aluctl = XCH_OPR;    first_opr = ACC_MEM;   second_opr = REG_GRP;  end
            OC8051_XCH_I : begin aluctl = XCH_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_XCH_D : begin aluctl = XCH_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_PUSH  : begin aluctl = PUSH_OPR;   first_opr = ACC_MEM;   second_opr = NON_MEM;  end
            OC8051_SWAP  : begin aluctl = SWAP_OPR;   first_opr = ACC_MEM;   second_opr = NON_MEM;  end

            OC8051_DJNZ_R: begin aluctl = ADD_OPR;    first_opr = REG_GRP;   second_opr = IMMD_VAL; end
            OC8051_XCHD  : begin aluctl = XCHD_OPR;   first_opr = ACC_MEM;   second_opr = REG_GRP;  end
            OC8051_DJNZ_D: begin aluctl = XCH_OPR;    first_opr = ACC_MEM;   second_opr = INT_MEM;  end
            OC8051_POP   : begin aluctl = PUSH_OPR;   first_opr = ACC_MEM;   second_opr = NON_MEM;  end 
            OC8051_DA    : begin aluctl = DA_OPR;     first_opr = ACC_MEM;   second_opr = NON_MEM;  end

            OC8051_MOV_R : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_I : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOVX_IA:begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_D : begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOVX_PA:begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_CLR_A : begin aluctl = CLR_OPR;    first_opr = NON_VAL;   second_opr = ACC_VAL;  end

            OC8051_MOV_AR: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end
            OC8051_MOV_AI: begin aluctl = MOV_OPR;    first_opr = NON_VAL;   second_opr = IMMD_VAL; end