Connecting an 8-bit peripheral to a 32-bit avalon bus

I think I made a mistake when I suggested a solution to you. There are actually 4 byteenable bits in the byteenable bus. One for each byte within the word. You probably need to do the following.

input [3:0] byteenable;

wire [2:0] address_int;

always (*)

begin

case(byteenable)

4'b0001: address_int = {address[2], 2'b00};

4'b0010: address_int = {address[2], 2'b01};

4'b0100: address_int = {address[2], 2'b10};

4'b1000: address_int = {address[2], 2'b11};

default: address_int = {address[2], 2'b00};

endcase

end

Please check out the avalon specification for more information on how byteenables work.

/Boris