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-rw-r--r--usrp2/gpmc/fifo_to_gpmc_async.v9
-rw-r--r--usrp2/gpmc/fifo_watcher.v38
-rw-r--r--usrp2/gpmc/gpmc_async.v10
-rw-r--r--usrp2/models/gpmc_model_async.v46
-rw-r--r--usrp2/top/u1e/Makefile6
5 files changed, 72 insertions, 37 deletions
diff --git a/usrp2/gpmc/fifo_to_gpmc_async.v b/usrp2/gpmc/fifo_to_gpmc_async.v
index 4f253e1b5..5ac8b19bd 100644
--- a/usrp2/gpmc/fifo_to_gpmc_async.v
+++ b/usrp2/gpmc/fifo_to_gpmc_async.v
@@ -8,7 +8,7 @@ module fifo_to_gpmc_async
(input clk, input reset, input clear,
input [17:0] data_i, input src_rdy_i, output dst_rdy_o,
output [15:0] EM_D, input EM_NCS, input EM_NOE,
- input [15:0] frame_len, output reg bus_error);
+ input [15:0] frame_len);
// Synchronize the async control signals
reg [1:0] cs_del, oe_del;
@@ -35,11 +35,4 @@ module fifo_to_gpmc_async
assign dst_rdy_o = do_read;
- always @(posedge clk)
- if(reset)
- bus_error <= 0;
- else if(dst_rdy_o & ~src_rdy_i)
- bus_error <= 1;
-
-
endmodule // fifo_to_gpmc_async
diff --git a/usrp2/gpmc/fifo_watcher.v b/usrp2/gpmc/fifo_watcher.v
index 8b8f1abfb..da2051b04 100644
--- a/usrp2/gpmc/fifo_watcher.v
+++ b/usrp2/gpmc/fifo_watcher.v
@@ -2,25 +2,47 @@
module fifo_watcher
(input clk, input reset, input clear,
- input src_rdy, input dst_rdy, input sof, input eof,
- output have_packet, output [15:0] length, input next);
+ input src_rdy1, input dst_rdy1, input sof1, input eof1,
+ input src_rdy2, input dst_rdy2, input sof2, input eof2,
+ output have_packet, output [15:0] length, output reg bus_error);
- wire write = src_rdy & dst_rdy & eof;
+ wire write = src_rdy1 & dst_rdy1 & eof1;
+ wire read = src_rdy2 & dst_rdy2 & eof2;
+ wire have_packet_int;
+ reg [15:0] counter;
fifo_short #(.WIDTH(16)) frame_lengths
(.clk(clk), .reset(reset), .clear(clear),
.datain(counter), .src_rdy_i(write), .dst_rdy_o(),
- .dataout(length), .src_rdy_o(have_packet), .dst_rdy_i(next) );
+ .dataout(length), .src_rdy_o(have_packet_int), .dst_rdy_i(read) );
- reg [15:0] counter;
always @(posedge clk)
if(reset | clear)
counter <= 1; // Start at 1
- else if(src_rdy & dst_rdy)
- if(eof)
+ else if(src_rdy1 & dst_rdy1)
+ if(eof1)
counter <= 1;
else
counter <= counter + 1;
-
+ always @(posedge clk)
+ if(reset | clear)
+ bus_error <= 0;
+ else if(dst_rdy2 & ~src_rdy2)
+ bus_error <= 1;
+ else if(read & ~have_packet_int)
+ bus_error <= 1;
+
+ reg in_packet;
+ assign have_packet = have_packet_int & ~in_packet;
+
+ always @(posedge clk)
+ if(reset | clear)
+ in_packet <= 0;
+ else if(src_rdy2 & dst_rdy2)
+ if(eof2)
+ in_packet <= 0;
+ else
+ in_packet <= 1;
+
endmodule // fifo_watcher
diff --git a/usrp2/gpmc/gpmc_async.v b/usrp2/gpmc/gpmc_async.v
index c4cf0ef89..22e56cc89 100644
--- a/usrp2/gpmc/gpmc_async.v
+++ b/usrp2/gpmc/gpmc_async.v
@@ -67,7 +67,6 @@ module gpmc_async
wire [17:0] rx18_data, rx18b_data;
wire rx18_src_rdy, rx18_dst_rdy, rx18b_src_rdy, rx18b_dst_rdy;
wire [15:0] rx_fifo_space, rx_frame_len;
- assign rx_frame_len = tx_frame_len;
fifo36_to_fifo18 f18_to_f36
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
@@ -83,15 +82,14 @@ module gpmc_async
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
.data_i(rx18b_data), .src_rdy_i(rx18b_src_rdy), .dst_rdy_o(rx18b_dst_rdy),
.EM_D(EM_D_fifo), .EM_NCS(EM_NCS4), .EM_NOE(EM_NOE),
- .frame_len(rx_frame_len), .bus_error(bus_error_rx) );
+ .frame_len(rx_frame_len) );
fifo_watcher fifo_watcher
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .src_rdy(rx18_src_rdy), .dst_rdy(rx18_dst_rdy), .sof(rx18_data[16]), .eof(rx18_data[17]),
- .have_packet(), .length(), .next() );
+ .src_rdy1(rx18_src_rdy), .dst_rdy1(rx18_dst_rdy), .sof1(rx18_data[16]), .eof1(rx18_data[17]),
+ .src_rdy2(rx18b_src_rdy), .dst_rdy2(rx18b_dst_rdy), .sof2(rx18b_data[16]), .eof2(rx18b_data[17]),
+ .have_packet(rx_have_data), .length(rx_frame_len), .bus_error(bus_error_rx) );
- assign rx_have_data = 0;
-
// ////////////////////////////////////////////
// Control path on CS6
diff --git a/usrp2/models/gpmc_model_async.v b/usrp2/models/gpmc_model_async.v
index 64b596284..beeaee028 100644
--- a/usrp2/models/gpmc_model_async.v
+++ b/usrp2/models/gpmc_model_async.v
@@ -78,28 +78,50 @@ module gpmc_model_async
#1000000;
GPMC_Read(1,36);
#1000000;
- GPMC_Write(0,36,16'h1234);
- GPMC_Write(0,38,16'h5678);
- GPMC_Write(0,40,16'h9abc);
- GPMC_Write(0,11'h2F4,16'hF00D);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- GPMC_Write(0,11'h7FE,16'hDEAD);
- #100000;
+ GPMC_Write(0,0,16'h1234);
+ GPMC_Write(0,0,16'h5678);
+ GPMC_Write(0,0,16'h9abc);
+ GPMC_Write(0,0,16'hF00D);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ #1000000;
+ GPMC_Write(0,0,16'h1234);
+ GPMC_Write(0,0,16'h5678);
+ GPMC_Write(0,0,16'h9abc);
+ GPMC_Write(0,0,16'hF00D);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'hDEAD);
+ GPMC_Write(0,0,16'h9876);
+ #1000000;
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
+ #1000000;
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
GPMC_Read(0,0);
- #100000;
+ GPMC_Read(0,0);
+ GPMC_Read(0,0);
+ #1000000;
GPMC_Read(0,0);
#100000000;
$finish;
diff --git a/usrp2/top/u1e/Makefile b/usrp2/top/u1e/Makefile
index 160e67894..e15a49e10 100644
--- a/usrp2/top/u1e/Makefile
+++ b/usrp2/top/u1e/Makefile
@@ -176,12 +176,12 @@ timing/time_receiver.v \
timing/time_sender.v \
timing/time_sync.v \
timing/timer.v \
-gpmc/gpmc.v \
+gpmc/gpmc_async.v \
gpmc/edge_sync.v \
gpmc/dbsm.v \
gpmc/gpmc_to_fifo_async.v \
-gpmc/gpmc_to_fifo_sync.v \
-gpmc/fifo_to_gpmc_sync.v \
+gpmc/fifo_to_gpmc_async.v \
+gpmc/fifo_watcher.v \
gpmc/gpmc_wb.v \
top/u1e/u1e_core.v \
top/u1e/u1e.ucf \
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 20:56:07 +0000