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module Controller(input CLK,
input [7:0] HASH, input START, output reg READY, output reg [15:0] MSG2_MSG1,
input CRC0_READY, output reg CRC0_START, output reg [15:0] CRC0_MSG2_MSG1, input [7:0] CRC0_HASH,
input CRC1_READY, output reg CRC1_START, output reg [15:0] CRC1_MSG2_MSG1, input [7:0] CRC1_HASH,
input CRC2_READY, output reg CRC2_START, output reg [15:0] CRC2_MSG2_MSG1, input [7:0] CRC2_HASH,
input CRC3_READY, output reg CRC3_START, output reg [15:0] CRC3_MSG2_MSG1, input [7:0] CRC3_HASH);
// The following code is a counter which will increment on every 32 clocks
reg [13:0] cnt;
reg calc_underway;
initial
begin
READY = 1;
MSG2_MSG1 = 0;
end
always @(posedge CLK)
begin
if(READY == 1)
begin
if(START == 1)
begin
READY = 0;
cnt = 0;
calc_underway = 0;
end
end
else
begin
if(calc_underway == 0)
begin
CRC0_MSG2_MSG1[15:14] = 2'b00; CRC0_MSG2_MSG1[13:0] = cnt;
CRC1_MSG2_MSG1[15:14] = 2'b01; CRC1_MSG2_MSG1[13:0] = cnt;
CRC2_MSG2_MSG1[15:14] = 2'b10; CRC2_MSG2_MSG1[13:0] = cnt;
CRC3_MSG2_MSG1[15:14] = 2'b11; CRC3_MSG2_MSG1[13:0] = cnt;
CRC0_START=1; CRC1_START=1; CRC2_START=1; CRC3_START=1;
calc_underway = 1;
end
else
begin
if(CRC0_READY==1 && CRC1_READY==1 && CRC2_READY==1 && CRC3_READY==1)
begin
calc_underway = 0;
if(CRC0_HASH == HASH)
begin
MSG2_MSG1[15:14] = 2'b00; MSG2_MSG1[13:0] = CRC0_MSG2_MSG1;
READY = 1;
end
else if(CRC1_HASH == HASH)
begin
MSG2_MSG1[15:14] = 2'b01; MSG2_MSG1[13:0] = CRC1_MSG2_MSG1;
READY = 1;
end
else if(CRC2_HASH == HASH)
begin
MSG2_MSG1[15:14] = 2'b10; MSG2_MSG1[13:0] = CRC2_MSG2_MSG1;
READY = 1;
end
else if(CRC3_HASH == HASH)
begin
MSG2_MSG1[15:14] = 2'b11; MSG2_MSG1[13:0] = CRC3_MSG2_MSG1;
READY = 1;
end
else
cnt = cnt + 1;
end
CRC0_START=0; CRC1_START=0; CRC2_START=0; CRC3_START=0;
end
end
end
endmodule
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