Qsys: Component Editor Parameter Error

Hi Daixiwen,

I got the same error while trying to create custom component with quartus version 13.1 in qsys which has parameter dependent address width.

I tried two cases to generate component but in both the cases i got same error that is "Error: Width of port av_d_addr_word_i/av_c_addr_word_i is invalid + (non-static) - (0) + 1 (must be an integer or parameter name)"

The tried case is in texts below.

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

// for case_1

// parameter for simulation purpose

parameter SIMULATION = 1'b0;

// parameter for specifying the memory depth in KBytes

parameter MEMORY_DEPTH_IN_KBYTES = 16;

// Local Parameter for memory depth in bytes.

localparam MEM_DEPTH_8 = ( MEMORY_DEPTH_IN_KBYTES * 1024 );

// Local Parameter for memory address width.(_8 prefix indicates this is for byte(8 bit)).

localparam MEM_ADDR_WIDTH_8 = clogb2( MEM_DEPTH_8 );

// Local Parameter for avalon slave component address width ( 32 bit aligned )

localparam AV_ADDR_WIDTH = ( MEM_ADDR_WIDTH_8 - 2 );

input [(AV_ADDR_WIDTH-1):0] av_d_addr_word_i;

input [(AV_ADDR_WIDTH-1):0] av_c_addr_word_i;

function integer clogb2;

input integer depth;

integer i;

integer result;

begin

result = 0;

for ( i = 0; 2 ** i < depth; i = i + 1 )

begin

result = i + 1;

end

clogb2 = result;

end

endfunction

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

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

For case_2

// parameter for simulation purpose

parameter SIMULATION = 1'b0;

// parameter for specifying the memory depth in KBytes

parameter MEMORY_DEPTH_IN_KBYTES = 16;

input [clogb2((MEMORY_DEPTH_IN_KBYTES * 1024)-2) -1 : 0] av_d_addr_word_i;

input [clogb2((MEMORY_DEPTH_IN_KBYTES * 1024)-2) -1 : 0] av_c_addr_word_i;

function integer clogb2;

input integer depth;

integer i;

integer result;

begin

result = 0;

for ( i = 0; 2 ** i < depth; i = i + 1 )

begin

result = i + 1;

end

clogb2 = result;

end

endfunction

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

Is there any other way to do this!

Will be looking forward to your reply.

Regards,

Hitesh.