求助：在ISE功能仿真无错误，无WARNing，但在XST进行RTL综合时却出现如下的错误和警告。各位大虾给个注意。
`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 17:08:02 09/14/2007
// Design Name:
// Module Name: da_fir
// Project Name:
// Target Devices:
// Tool versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
module da_fir(clk, reset, fir_in, fir_out);
parameter IDATA_WIDTH = 12; //输入数据位宽
parameter PDATA_WIDTH = 13; //处理数据位宽
parameter FIR_TAP = 8; //fir滤波器抽头数
parameter FIR_TAPHALF = 4; //fir滤波器的一半抽头数
parameter COEFF_WIDTH = 12; //系数位宽
parameter OUT_WIDTH = 27; //输出数据位宽
parameter cof1 = 12'd41;
parameter cof2 = 12'd132;
parameter cof3 = 12'd341;
parameter cof4 = 12'd510;
parameter S0 = 1'b0; //初始状态
parameter S1 = 1'b1; //处理状态
input clk;
input reset;
input [IDATA_WIDTH-1:0] fir_in;
output [OUT_WIDTH-1:0] fir_out;
reg [OUT_WIDTH-1:0] fir_out;
reg [IDATA_WIDTH-1:0] fir_in_reg;
reg [PDATA_WIDTH-1:0] shift_buf[FIR_TAP-1:0]; //定义移位寄存器
reg [PDATA_WIDTH-1:0] add_buf[FIR_TAPHALF-1:0];
reg [PDATA_WIDTH-1:0] state_shift_buf[FIR_TAPHALF-1:0];
wire [3:0] table_4b; //查表输入
wire [COEFF_WIDTH-1:0] table_out_12b; //查表输出
reg [OUT_WIDTH-1:0] sum;
reg STATE;
reg [3:0] divfre_count_4b;
reg divfre13_clk;
integer i,j,k,l,m,n,p;
//定义移位寄存器左移的函数delta
function [OUT_WIDTH-1:0] delta;
input [OUT_WIDTH-1:0] IQ;
input [3:0] pipe;
begin
case(pipe)
4'b0000: delta = IQ;
4'b0001: delta = {IQ[OUT_WIDTH-2:0],1'b0};
4'b0010: delta = {IQ[OUT_WIDTH-3:0],2'b00};
4'b0011: delta = {IQ[OUT_WIDTH-4:0],3'b000};
4'b0100: delta = {IQ[OUT_WIDTH-5:0],4'b0000};
4'b0101: delta = {IQ[OUT_WIDTH-6:0],5'b00000};
4'b0110: delta = {IQ[OUT_WIDTH-7:0],6'b000000};
4'b0111: delta = {IQ[OUT_WIDTH-8:0],7'b0000000};
4'b1000: delta = {IQ[OUT_WIDTH-9:0],8'b00000000};
4'b1001: delta = {IQ[OUT_WIDTH-10:0],9'b000000000};
4'b1010: delta = {IQ[OUT_WIDTH-11:0],10'b0000000000};
4'b1011: delta = {IQ[OUT_WIDTH-12:0],11'b00000000000};
4'b1100: delta = {IQ[OUT_WIDTH-13:0],12'b000000000000};
4'b1101: delta = {IQ[OUT_WIDTH-14:0],13'b0000000000000};
4'b1110: delta = {IQ[OUT_WIDTH-15:0],14'b00000000000000};
4'b1111: delta = {IQ[OUT_WIDTH-16:0],15'b000000000000000};
default: delta = IQ;
endcase
end
endfunction
always @(posedge clk or negedge reset)
begin
if(!reset)
begin
divfre13_clk <= 1'b0;
divfre_count_4b <= 4'b0000;
end
else
begin
if(divfre_count_4b==PDATA_WIDTH)
begin
divfre_count_4b <= 4'b0000;
divfre13_clk <= 1'b1;
end
else
begin
divfre_count_4b <= divfre_count_4b + 1'b1;
divfre13_clk <= 1'b0;
end
end
end
always @(posedge clk or negedge reset)
begin
if(!reset)
fir_in_reg <= 12'b0000_0000_0000;
else
if(divfre13_clk)
fir_in_reg <= fir_in;
end
always @(posedge clk or negedge reset)
begin
if(!reset)
for(i=0; i<=FIR_TAP-1; i="i"+1)
shift_buf[i] <= 13'b0000_0000_00000;
else
if(divfre13_clk)
begin
for(j=0; j<FIR_TAP-1; j="j"+1)
shift_buf[j+1] <= shift_buf[j];
shift_buf[0] <= {fir_in_reg[IDATA_WIDTH-1],fir_in_reg}; //符号位扩展
end
end
always @(posedge clk or negedge reset)
begin
if(!reset)
for(k=0; k<=FIR_TAPHALF-1; k="k"+1)
add_buf[k] <= 13'b0000_0000_00000;
else
if(divfre13_clk)
for(l=0; l<=FIR_TAPHALF-1; l="l"+1)
add_buf[l] <= shift_buf[l]+shift_buf[FIR_TAP-1-l];
end
//有限状态机的初始化，比特移位
always @(posedge clk or negedge reset)
begin
if(!reset)
begin
for(m=0; m<=FIR_TAPHALF-1; m="m"+1)
state_shift_buf[m] <= 13'b0000_0000_00000;
STATE <= S0;
end
else
case(STATE)
S0:begin
for(n=0; n<=FIR_TAPHALF-1; n="n"+1)
state_shift_buf[n] <= add_buf[n];
STATE <= S1;
end
S1:begin
if(divfre_count_4b==4'b1101)
STATE <= S0;
else
begin
for(p=0; p<=PDATA_WIDTH-2; p="p"+1)
begin
state_shift_buf[0][p] <= state_shift_buf[0][p+1];
state_shift_buf[1][p] <= state_shift_buf[1][p+1];
state_shift_buf[2][p] <= state_shift_buf[2][p+1];
state_shift_buf[3][p] <= state_shift_buf[3][p+1];
end
STATE <= S1;
end
end
endcase
end
assign table_4b[0] = state_shift_buf[0][0];
assign table_4b[1] = state_shift_buf[1][0];
assign table_4b[2] = state_shift_buf[2][0];
assign table_4b[3] = state_shift_buf[3][0];
DA_table U_DA(
.table_in_4b(table_4b),
.table_out_12b(table_out_12b)
);
wire [26:0] sign_ex={table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b[11],table_out_12b};
always @(posedge clk or negedge reset)
begin
if(!reset)
sum <= 27'b0;
else
if(divfre_count_4b==4'b0000)
sum <= 27'b0;
else
if(divfre_count_4b==4'b1101)
sum <= sum - delta(sign_ex, divfre_count_4b-4'b0001);
else
sum <= sum + delta(sign_ex, divfre_count_4b-4'b0001);
end
always @(posedge clk or negedge reset)
begin
if(!reset)
fir_out <= 27'b0;
else
if(divfre_count_4b==4'b0000)
fir_out <= sum;
end
endmodule
错误和警告
WARNING:HDLCompilers:176 - Include directory \da_fir\ does not exist
WARNING:Xst - Property "use_dsp48" is not applicable for this technology.
WARNING:Xst - Property "use_dsp48" is not applicable for this technology.
WARNING:Xst - Property "use_dsp48" is not applicable for this technology.
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><12>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><11>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><10>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><9>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><8>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><7>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><6>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><5>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><4>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><3>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><2>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><1>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<0><0>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><12>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><11>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><10>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><9>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><8>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><7>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><6>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><5>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><4>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><3>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><2>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><1>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<1><0>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><12>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><11>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><10>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><9>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><8>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><7>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><6>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><5>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><4>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><3>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><2>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><1>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<2><0>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><12>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><11>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><10>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><9>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><8>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><7>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><6>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><5>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><4>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><3>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><2>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><1>>
ERROR:Xst:528 - Multi-source in Unit <da_fir> on signal <state_shift_buf<3><0>>
