VCS シンセサイザーでこのエラーが発生します。私はすべてを試しましたが、それは私には意味がありません。VectorY[0]、VectorY[1]、VectorY[2]、VectorY[3]、または直接接続されたネットが複数のソースによって駆動されており、少なくとも 1 つのソースが定数ネットであることが示されています。(ELAB-368)
module control (clk, start, S1S2mux, newDist, CompStart, PEready, VectorX, VectorY, addressR, addressS1, addressS2,completed);
input clk;
input start;
output reg [15:0] S1S2mux;
output reg [15:0] newDist;
output CompStart;
output reg [15:0] PEready;
output reg [3:0] VectorX,VectorY;
output reg [7:0] AddressR;
output reg [9:0] AddressS1,AddressS2;
reg [12:0] count;
output reg completed;
integer i;
assign CompStart = start;
always @(posedge clk) begin
if(start==0) begin
count<= 12'b0;
completed<=0;
newDist<=0;
PEready<=0;
VectorX<=0;
VectorY<=0;
end
else if (completed==0)
count <= count+1'b1;
end
always @(count) begin
for (i = 0; i < 15; i = i+1)
begin
newDist [i] = (count [7:0] == i);
PEready [i] = (newDist [i] && !(count < 8'd256));
S1S2mux [i] = (count [3:0] > i);
end
addressR = count [7:0];
addressS1 = (count[11:8] + count[7:4] >> 4)*5'd32 + count [3:0];
addressS2 = (count[11:8] + count[7:4] >> 4)*4'd16 + count [3:0];
VectorX = count[3:0] - 4'd7;
VectorY = count[11:8] >> 4 - 4'd7;
completed = (count == 4'd16 * (8'd256 + 1));
end
endmodule