diff options
Diffstat (limited to 'fpga/usrp3/lib/sim/fifo/axi_fifo_2clk')
| -rw-r--r-- | fpga/usrp3/lib/sim/fifo/axi_fifo_2clk/axi_fifo_2clk_tb.sv | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/fpga/usrp3/lib/sim/fifo/axi_fifo_2clk/axi_fifo_2clk_tb.sv b/fpga/usrp3/lib/sim/fifo/axi_fifo_2clk/axi_fifo_2clk_tb.sv new file mode 100644 index 000000000..c2c69b963 --- /dev/null +++ b/fpga/usrp3/lib/sim/fifo/axi_fifo_2clk/axi_fifo_2clk_tb.sv @@ -0,0 +1,121 @@ +// +// Copyright 2016 Ettus Research +// + +module axi_fifo_2clk_tb(); + + localparam WIDTH = 32; + localparam SIZE = 5; + + reg s_axis_clk; + reg s_axis_rst; + reg [WIDTH-1:0] s_axis_tdata; + reg s_axis_tvalid; + reg s_axis_tlast; + wire s_axis_tready; + reg m_axis_clk; + reg m_axis_rst; + wire [WIDTH-1:0] m_axis_tdata; + wire m_axis_tvalid; + wire m_axis_tlast; + reg m_axis_tready; + wire [SIZE:0] s_axis_occupied; + wire s_axis_full; + wire s_axis_empty; + wire [SIZE:0] m_axis_occupied; + wire m_axis_full; + wire m_axis_empty; + + axi_fifo_2clk #(.SIZE(SIZE),.WIDTH(WIDTH)) axi_fifo_2clk ( + .s_axis_clk(s_axis_clk), + .s_axis_rst(s_axis_rst), + .s_axis_tdata(s_axis_tdata), + .s_axis_tvalid(s_axis_tvalid), + .s_axis_tlast(s_axis_tlast), + .s_axis_tready(s_axis_tready), + .m_axis_clk(m_axis_clk), + .m_axis_rst(m_axis_rst), + .m_axis_tdata(m_axis_tdata), + .m_axis_tvalid(m_axis_tvalid), + .m_axis_tlast(m_axis_tlast), + .m_axis_tready(m_axis_tready), + .s_axis_occupied(s_axis_occupied), + .s_axis_full(s_axis_full), + .s_axis_empty(s_axis_empty), + .m_axis_occupied(m_axis_occupied), + .m_axis_full(m_axis_full), + .m_axis_empty(m_axis_empty)); + + `define S_AXIS_CLK_PERIOD 7 + initial begin + s_axis_clk = 1'b0; + forever begin + #(`S_AXIS_CLK_PERIOD/2) s_axis_clk = ~s_axis_clk; + end + end + + `define S_AXIS_RESET_PERIOD 70 + initial begin + s_axis_rst = 1'b1; + #(`S_AXIS_RESET_PERIOD) s_axis_rst = 1'b0; + end + + `define M_AXIS_CLK_PERIOD 10 + initial begin + m_axis_clk = 1'b0; + forever begin + #(`M_AXIS_CLK_PERIOD/2) m_axis_clk = ~m_axis_clk; + end + end + + `define M_AXIS_RESET_PERIOD 100 + initial begin + m_axis_rst = 1'b1; + #(`M_AXIS_RESET_PERIOD) m_axis_rst = 1'b0; + end + + initial begin + @(posedge m_axis_clk); + @(posedge s_axis_clk); + s_axis_tdata = 'd0; + s_axis_tlast = 1'b0; + s_axis_tvalid = 1'b0; + m_axis_tready = 1'b0; + assert(~s_axis_full && ~m_axis_full) else $error("FIFO is full during reset!"); + assert(s_axis_empty == 1'b1 && m_axis_empty == 1'b1) else $error("FIFO is not empty during reset!"); + assert(s_axis_occupied == 0 && m_axis_occupied == 0) else $error("FIFO is occupied during reset!"); + while (s_axis_rst) @(negedge s_axis_rst); + while (m_axis_rst) @(negedge m_axis_rst); + @(posedge m_axis_clk); + @(posedge s_axis_clk); + assert(~s_axis_full && ~m_axis_full) else $error("FIFO is full after reset!"); + assert(s_axis_empty == 1'b1 && m_axis_empty == 1'b1) else $error("FIFO is not empty after reset!"); + assert(s_axis_occupied == 0 && m_axis_occupied == 0) else $error("FIFO is occupied after reset!"); + // Fill FIFO + while (~s_axis_tready) @(posedge s_axis_clk); + for (int i = 0; i < 1 << DEPTH_LOG2; i++) begin + s_axis_tdata = i+1'b1; + s_axis_tvalid = 1'b1; + @(posedge s_axis_clk); + end + repeat (6) @(posedge s_axis_clk); + assert(s_axis_full && m_axis_full) else $error("Incorrect FIFO full flag!"); + assert(~s_axis_empty && ~m_axis_empty) else $error("Incorrect FIFO empty flag!"); + assert(s_axis_occupied == (1 << DEPTH_LOG2) && m_axis_occupied == (1 << DEPTH_LOG2)) else $error("Incorrect FIFO occupied count!"); + // Empty FIFO + s_axis_tdata = 'd0; + s_axis_tvalid = 1'b0; + @(posedge m_axis_clk); + while (~m_axis_tvalid) @(posedge m_axis_clk); + for (int i = 0; i < 1 << DEPTH_LOG2; i++) begin + m_axis_tready = 1'b1; + @(posedge m_axis_clk); + assert(m_axis_tdata == i+1'b1) else $error("Incorrect FIFO data! (read)"); + end + repeat (6) @(posedge m_axis_clk); + assert(~s_axis_full && ~m_axis_full) else $error("Incorrect FIFO full flag!"); + assert(s_axis_empty && m_axis_empty) else $error("Incorrect FIFO empty flag!"); + assert(s_axis_occupied == 0 && m_axis_occupied == 0) else $error("Incorrect FIFO occupied count!"); + end + +endmodule
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