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authorMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
committerMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
commitfd3e84941de463fa1a7ebab0a69515b4bf2614cd (patch)
tree3fa721a13d41d2c0451d663a59a220a38fd5e614 /fpga/usrp2/control_lib/simple_uart_rx.v
parent3b66804e41891e358c790b453a7a59ec7462dba4 (diff)
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Removed copy of FPGA source files.
Diffstat (limited to 'fpga/usrp2/control_lib/simple_uart_rx.v')
-rw-r--r--fpga/usrp2/control_lib/simple_uart_rx.v81
1 files changed, 0 insertions, 81 deletions
diff --git a/fpga/usrp2/control_lib/simple_uart_rx.v b/fpga/usrp2/control_lib/simple_uart_rx.v
deleted file mode 100644
index 5f7646e03..000000000
--- a/fpga/usrp2/control_lib/simple_uart_rx.v
+++ /dev/null
@@ -1,81 +0,0 @@
-//
-// 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 simple_uart_rx
- #(parameter DEPTH=0)
- (input clk, input rst,
- output [7:0] fifo_out, input fifo_read, output [7:0] fifo_level, output fifo_empty,
- input [15:0] clkdiv, input rx);
-
- reg rx_d1, rx_d2;
- always @(posedge clk)
- if(rst)
- {rx_d2,rx_d1} <= 0;
- else
- {rx_d2,rx_d1} <= {rx_d1,rx};
-
- reg [15:0] baud_ctr;
- reg [3:0] bit_ctr;
- reg [7:0] sr;
-
- wire neg_trans = rx_d2 & ~rx_d1;
- wire shift_now = baud_ctr == (clkdiv>>1);
- wire stop_now = (bit_ctr == 10) && shift_now;
- wire go_now = (bit_ctr == 0) && neg_trans;
-
- always @(posedge clk)
- if(rst)
- sr <= 0;
- else if(shift_now)
- sr <= {rx_d2,sr[7:1]};
-
- always @(posedge clk)
- if(rst)
- baud_ctr <= 0;
- else
- if(go_now)
- baud_ctr <= 1;
- else if(stop_now)
- baud_ctr <= 0;
- else if(baud_ctr >= clkdiv)
- baud_ctr <= 1;
- else if(baud_ctr != 0)
- baud_ctr <= baud_ctr + 1;
-
- always @(posedge clk)
- if(rst)
- bit_ctr <= 0;
- else
- if(go_now)
- bit_ctr <= 1;
- else if(stop_now)
- bit_ctr <= 0;
- else if(baud_ctr == clkdiv)
- bit_ctr <= bit_ctr + 1;
-
- wire full;
- wire write = ~full & rx_d2 & stop_now;
-
- medfifo #(.WIDTH(8),.DEPTH(DEPTH)) fifo
- (.clk(clk),.rst(rst),
- .datain(sr),.write(write),.full(full),
- .dataout(fifo_out),.read(fifo_read),.empty(fifo_empty),
- .clear(0),.space(),.occupied(fifo_level) );
-
-endmodule // simple_uart_rx