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Diffstat (limited to 'fpga/usrp2/models/gpmc_model_async.v')
| -rw-r--r-- | fpga/usrp2/models/gpmc_model_async.v | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/fpga/usrp2/models/gpmc_model_async.v b/fpga/usrp2/models/gpmc_model_async.v new file mode 100644 index 000000000..22b3cdf9f --- /dev/null +++ b/fpga/usrp2/models/gpmc_model_async.v @@ -0,0 +1,147 @@ +// +// 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/>. +// + +`timescale 1ps/1ps + +module gpmc_model_async + (output EM_CLK, inout [15:0] EM_D, output reg [10:1] EM_A, output reg [1:0] EM_NBE, + output reg EM_WAIT0, output reg EM_NCS4, output reg EM_NCS6, + output reg EM_NWE, output reg EM_NOE ); + + assign EM_CLK = 0; + reg [15:0] EM_D_int; + assign EM_D = EM_D_int; + + initial + begin + EM_A <= 10'bz; + EM_NBE <= 2'b11; + EM_NWE <= 1; + EM_NOE <= 1; + EM_NCS4 <= 1; + EM_NCS6 <= 1; + EM_D_int <= 16'bz; + EM_WAIT0 <= 0; // FIXME this is actually an input + end + + task GPMC_Write; + input ctrl; + input [10:0] addr; + input [15:0] data; + begin + #23000; + EM_A <= addr[10:1]; + EM_D_int <= data; + #20100; + if(ctrl) + EM_NCS6 <= 0; + else + EM_NCS4 <= 0; + #14000; + EM_NWE <= 0; + #77500; + EM_NCS4 <= 1; + EM_NCS6 <= 1; + //#1.5; + EM_NWE <= 1; + #60000; + EM_A <= 10'bz; + EM_D_int <= 16'bz; + end + endtask // GPMC_Write + + task GPMC_Read; + input ctrl; + input [10:0] addr; + begin + #13000; + EM_A <= addr[10:1]; + #3000; + if(ctrl) + EM_NCS6 <= 0; + else + EM_NCS4 <= 0; + #14000; + EM_NOE <= 0; + #77500; + EM_NCS4 <= 1; + EM_NCS6 <= 1; + //#1.5; + $display("Data Read from GPMC: %X",EM_D); + EM_NOE <= 1; + #254000; + EM_A <= 10'bz; + end + endtask // GPMC_Read + + initial + begin + #1000000; + GPMC_Write(1,36,16'hF00D); + #1000000; + GPMC_Read(1,36); + #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'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); + GPMC_Read(0,0); + GPMC_Read(0,0); + #1000000; + GPMC_Read(0,0); + #100000000; + $finish; + end + +endmodule // gpmc_model_async |