ProgrammableGatorade

genvar n;
generate 
  for (n=0; n<NumNodes; n=n+1) 
  begin: GEN_NODES
    Node #(
      .NodeID             ( n                     ),
      .NumNodes           ( NumNodes              ),
      .L2NumNodes         ( L2NumNodes            ),
      .DistVecWidth       ( DistVecWidth          ),
      .DistMatrixPkdWidth ( DistMatrixPkdWidth    )

ProgrammableGatorade

always@(*) 
begin : REPORT_DIST_VECTOR
  integer r,c;
  dist_vec_o = {DistVecWidth{1'b1}};
  for (c=0; c<NumNodes; c=c+1) begin
    for (r=0; r<NumNodes; r=r+1) begin
      if (dist_matrix_lcl[r][`NODE_SEL(c)] < dist_vec_o[`NODE_SEL(c)]) begin
        dist_vec_o[`NODE_SEL(c)] = dist_matrix_lcl[r][`NODE_SEL(c)];
      end        
    end    

ProgrammableGatorade

// macro to select a node's distance in a packed distance vector 
`define NODE_SEL(node_num)  (node_num)*L2NumNodes +: L2NumNodes

module Node #(
    parameter NodeID              = 0,                        // identifier for this node
    parameter NumNodes            = 10,                       // total number of nodes in graph
    parameter L2NumNodes          = Log2(NumNodes),           // number of bits we need to store a node id
    parameter DistVecWidth        = NumNodes * L2NumNodes,    // number of bits we need to store a dist vec
    parameter DistMatrixPkdWidth  = NumNodes * DistVecWidth   // number of bits we need to store a dist matrix
)(

ProgrammableGatorade

for (r=0; r<NumNodes; r=r+1) begin
  for (c=0; c<NumNodes; c=c+1) begin
    if (r == NodeID) begin
      // this is our row in the distance matrix.
      // we use the adjacency vector to update the matrix. 
      if (c == NodeID) begin
        // the distance from a node to itself is 0
        dist_matrix_lcl[r][`NODE_SEL(c)] <= 0;                    
      end else if (adj_vec[c]) begin
        // the distance from a node to its neighbor is 1

ProgrammableGatorade

module GraphRadius #(
    parameter NumNodes              = 10,
    parameter L2NumNodes            = Log2(NumNodes),
    parameter DistVecWidth          = NumNodes * L2NumNodes,
    parameter DistMatrixPkdWidth    = NumNodes * DistVecWidth,
    parameter CHARS_PER_LINE        = 16,       
    parameter CYCLES_PER_IDLE       = 375000,   
    parameter CYCLES_PER_CMD        = 25000,    
    parameter CYCLE_ENA_ASSERT      = 25,       
    parameter CYCLE_ENA_DEASSERT    = 50