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//
// Copyright 2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
module trigger_context_pkt
#(parameter BASE=0)
(input clk, input reset, input clear,
input set_stb, input [7:0] set_addr, input [31:0] set_data,
input packet_consumed, output trigger);
wire [23:0] cycles;
wire [15:0] packets;
wire [6:0] dummy1;
wire [14:0] dummy2;
wire enable_cycle, enable_consumed;
reg [30:0] cycle_count, packet_count;
setting_reg #(.my_addr(BASE), .at_reset(0)) sr_cycles
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out({enable_cycle,dummy1,cycles}),.changed());
setting_reg #(.my_addr(BASE+1), .at_reset(0)) sr_packets
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out({enable_consumed,dummy2,packets}),.changed());
always @(posedge clk)
if(reset | clear)
cycle_count <= 0;
else
if(trigger)
cycle_count <= 0;
else if((enable_cycle & packet_consumed) | (cycle_count != 0))
cycle_count <= cycle_count + 1;
always @(posedge clk)
if(reset | clear)
packet_count <= 0;
else
if(trigger)
packet_count <= 0;
else if(packet_consumed & enable_consumed)
packet_count <= packet_count + 1;
assign trigger = (enable_cycle & (cycle_count >= cycles)) | (enable_consumed & (packet_count >= packets));
endmodule // trigger_context_pkt
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