StreamFIFOTest.bsv
上传用户:aoptech
上传日期:2014-09-22
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- //----------------------------------------------------------------------//
- // The MIT License
- //
- // Copyright (c) 2007 Alfred Man Cheuk Ng, mcn02@mit.edu
- //
- // Permission is hereby granted, free of charge, to any person
- // obtaining a copy of this software and associated documentation
- // files (the "Software"), to deal in the Software without
- // restriction, including without limitation the rights to use,
- // copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the
- // Software is furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be
- // included in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- // OTHER DEALINGS IN THE SOFTWARE.
- //----------------------------------------------------------------------//
- import StreamFIFO::*;
- import Vector::*;
- `define BufferSz 8
- `define SSz 2
- //`define SSz TLog#(TAdd#(`BufferSz,1))
- `define MaxSSz fromInteger(valueOf(TExp#(`SSz))-1)
- `define DataSz 32
- `define CntSz TMul#(`BufferSz,`DataSz)
- (* synthesize *)
- module mkStreamFIFOInstance(StreamFIFO#(`BufferSz,`SSz,Bit#(`DataSz)));
- StreamFIFO#(`BufferSz,`SSz,Bit#(`DataSz)) fifos <- mkStreamLFIFO;
- return fifos;
- endmodule
- (* synthesize *)
- module mkStreamFIFOTest(Empty);
- // state elements
- let fifos <- mkStreamFIFOInstance;
- Reg#(Bit#(`CntSz)) counter <- mkReg(0);
- Reg#(Bit#(`SSz)) inSz <- mkReg(1);
- Reg#(Bit#(`SSz)) outSz <- mkReg(1);
- Reg#(Bit#(32)) clockCnt <- mkReg(0);
-
- // rules
- rule enqData(fifos.notFull(inSz));
- counter <= counter + 1;
- fifos.enq(inSz,unpack(counter));
- $display("enq %d elements: %x",inSz,counter);
- endrule
- rule deqData(fifos.notEmpty(outSz));
- let data = fifos.first;
- fifos.deq(outSz);
- $display("deq %d elements: %x",outSz,pack(data));
- endrule
- rule advClock(True);
- inSz <= (inSz == `MaxSSz) ? 1 : inSz + 1;
- outSz <= (outSz == 1) ? `MaxSSz : outSz - 1;
- clockCnt <= clockCnt + 1;
- $display("clock: %d",clockCnt);
- endrule
-
- rule finish(clockCnt == 3000);
- $finish;
- endrule
- endmodule