diff options
Diffstat (limited to 'fpga/usrp2/control_lib/wb_semaphore.v')
| -rw-r--r-- | fpga/usrp2/control_lib/wb_semaphore.v | 59 | 
1 files changed, 0 insertions, 59 deletions
| diff --git a/fpga/usrp2/control_lib/wb_semaphore.v b/fpga/usrp2/control_lib/wb_semaphore.v deleted file mode 100644 index e90950509..000000000 --- a/fpga/usrp2/control_lib/wb_semaphore.v +++ /dev/null @@ -1,59 +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/>. -// - - -// up to 8 semaphores - -// After a read operation, the semaphore is always locked -//  If it was already locked before the read (meaning someone else holds the lock) -//    then a 1 is returned -//  If it was not already locked (meaning the reader now holds the lock) -//    then a 0 is returned - -// A write operation clears the lock - -module wb_semaphore  -  #(parameter count=8, DBUS_WIDTH=32) -    (input wb_clk_i, -     input wb_rst_i, -     input [DBUS_WIDTH-1:0] wb_dat_i, -     input [2:0] wb_adr_i, -     input wb_cyc_i, -     input wb_stb_i, -     input wb_we_i, -     output wb_ack_o, -     output [DBUS_WIDTH-1:0] wb_dat_o); - -   reg [count-1:0] locked; - -   always @(posedge clock) -     if(wb_rst_i) -       locked <= {count{1'b0}}; -     else if(wb_stb_i) -       if(wb_we_i) -	 locked[adr_i] <= 1'b0; -       else -	 locked[adr_i] <= 1'b1; - -   assign 	   wb_dat_o[DBUS_WIDTH-1:1] = {(DBUS_WIDTH-1){1'b0}}; -   assign 	   wb_dat_o[0] = locked[adr_i]; -   assign 	   wb_ack_o = wb_stb_i; -    - -endmodule // wb_semaphore - -      | 
