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Diffstat (limited to 'usrp2/models/uart_rx.v')
-rw-r--r-- | usrp2/models/uart_rx.v | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/usrp2/models/uart_rx.v b/usrp2/models/uart_rx.v deleted file mode 100644 index 738ffb45b..000000000 --- a/usrp2/models/uart_rx.v +++ /dev/null @@ -1,65 +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/>. -// - - - -// Simple printout of characters from the UART -// Only does 8N1, requires the baud clock - -module uart_rx (input baudclk, input rxd); - reg [8:0] sr = 9'b0; - reg [3:0] baud_ctr = 4'b0; - - /* - wire byteclk = baud_ctr[3]; - reg rxd_d1 = 0; - always @(posedge baudclk) - rxd_d1 <= rxd; - - always @(posedge baudclk) - if(rxd_d1 != rxd) - baud_ctr <= 0; - else - baud_ctr <= baud_ctr + 1; -*/ - - wire byteclk = baudclk; - - always @(posedge byteclk) - sr <= { rxd, sr[8:1] }; - - reg [3:0] state = 0; - always @(posedge byteclk) - case(state) - 0 : - if(~sr[8] & sr[7]) // found start bit - state <= 1; - 1, 2, 3, 4, 5, 6, 7, 8 : - state <= state + 1; - 9 : - begin - state <= 0; - $write("%c",sr[7:0]); - if(~sr[8]) - $display("Error, no stop bit\n"); - end - default : - state <= 0; - endcase // case(state) - -endmodule // uart_rx - |