Squashed B200 FPGA Source. Code from Josh Blum, Ian Buckley, and Matt Ettus.

1 files changed, 50 insertions, 0 deletions

diff --git a/fpga/usrp3/lib/vita/trigger_context_pkt.v b/fpga/usrp3/lib/vita/trigger_context_pkt.v
new file mode 100644
index 000000000..b67fa4313
--- /dev/null
+++ b/fpga/usrp3/lib/vita/trigger_context_pkt.v
@@ -0,0 +1,50 @@
+//
+// Copyright 2011 Ettus Research LLC
+//
+
+
+
+
+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