TimeQuest Timing issue

rbugalho,

The following is my testing code, which is a very simple one. The function is to do the accumulation of several input data and return the upper 16bit result. Why it fails at 250MHz clock? Cyclone VE should be way fast than that speed. I am a green-hand in using the TimeQuest Time Analyzer. It will be very thankful if you can help me through.

**********************************************************************************

module average

(clock,

reset,

datain,

add_enable,

g_value,

dataout,

data_ready

);

input clock;

input reset;

input [15:0] datain;

input add_enable;

input [15:0] g_value;

output reg [15:0] dataout;

output reg data_ready;

reg [31:0] adder;

reg [7:0] add_counter;

always @ (posedge clock, posedge reset)

begin

if (reset)

begin

adder <= 32'b0;

data_ready <= 1'b0;

end

else

begin

if (add_enable)

begin

data_ready <= 1'b0;

adder <= adder + {16'b0,datain};

end

else

begin

dataout <= adder[31:16];

adder <= 32'b0;

data_ready <= 1'b1;

end

end

end

endmodule