08使用fdma读写axi-bram(AXI4总线实战)

`timescale 1ns / 1ps

//////////////////////////////////////////////////////////////////////////////////

/*

Company : Liyang Milian Electronic Technology Co., Ltd.

Brand: (milianke)

Technical forum:uisrc.com

taobao: https://milianke.taobao.com https://osrc.taobao.com

jd:https://milianke.jd.com

Create Date: 2021/04/25

Module Name: fdma_bram_test

Description:

Copyright: Copyright (c) milianke

Revision: 1.0

Signal description:

1) _i input

2) _o output

3) _n activ lowpai

4) _dg debug signal

5) _r delay or register

6) _s state mechine

*/

//////////////////////////////////////////////////////////////////////////////////

module fdma_bram_test(

input sysclk_p,

input sysclk_n

);

wire [31:0] fdma_raddr;

reg fdma_rareq;

wire fdma_rbusy;

wire [127:0] fdma_rdata;

wire [15:0] fdma_rsize;

wire fdma_rvalid;

wire [31:0] fdma_waddr;

reg fdma_wareq;

wire fdma_wbusy;

wire [127:0] fdma_wdata;

wire [15:0] fdma_wsize;

wire fdma_wvalid;

wire [0:0] fdma_rstn;

wire ui_clk;

parameter TEST_MEM_SIZE = 32'd64*1024;//64KB

parameter FDMA_BURST_LEN = 16'd512;

parameter ADDR_MEM_OFFSET = 0;

parameter ADDR_INC = FDMA_BURST_LEN * 16;

parameter WRITE1 = 0;

parameter WRITE2 = 1;

parameter WAIT = 2;

parameter READ1 = 3;

parameter READ2 = 4;

reg [31: 0] t_data;

reg [31: 0] fdma_waddr_r;

reg [2 :0] T_S = 0;

assign fdma_waddr = fdma_waddr_r + ADDR_MEM_OFFSET;

assign fdma_raddr = fdma_waddr;

assign fdma_wsize = FDMA_BURST_LEN;

assign fdma_rsize = FDMA_BURST_LEN;

assign fdma_wdata ={t_data,t_data,t_data,t_data};

//delay reset

reg [8:0] rst_cnt = 0;

always @(posedge ui_clk)

if(rst_cnt[8] == 1'b0)

rst_cnt <= rst_cnt + 1'b1;

else

rst_cnt <= rst_cnt;

always @(posedge ui_clk)begin

if(rst_cnt[8] == 1'b0)begin

T_S <=0;

fdma_wareq <= 1'b0;

fdma_rareq <= 1'b0;

t_data<=0;

fdma_waddr_r <=0;

end

else begin

case(T_S)

WRITE1:begin

if(fdma_waddr_r==TEST_MEM_SIZE) fdma_waddr_r<=0;

if(!fdma_wbusy)begin

fdma_wareq <= 1'b1;

t_data <= 0;

end

if(fdma_wareq&&fdma_wbusy)begin

fdma_wareq <= 1'b0;

T_S <= WRITE2;

end

end

WRITE2:begin

if(!fdma_wbusy) begin

T_S <= WAIT;

t_data <= 32'd0;

end

else if(fdma_wvalid) begin

t_data <= t_data + 1'b1;

end

end

WAIT:begin//not needed

T_S <= READ1;

end

READ1:begin

if(!fdma_rbusy)begin

fdma_rareq <= 1'b1;

t_data <= 0;

end

if(fdma_rareq&&fdma_rbusy)begin

fdma_rareq <= 1'b0;

T_S <= READ2;

end

end

READ2:begin

if(!fdma_rbusy) begin

T_S <= WRITE1;

t_data <= 32'd0;

fdma_waddr_r <= fdma_waddr_r + ADDR_INC;//128/8=16

end

else if(fdma_rvalid) begin

t_data <= t_data + 1'b1;

end

end

default:

T_S <= WRITE1;

endcase

end

end

wire test_error = (fdma_rvalid && (t_data[15:0] != fdma_rdata[15:0]));

ila_0 ila_dbg (

    .clk(ui_clk),

    .probe0({fdma_wdata[15:0],fdma_wareq,fdma_wvalid,fdma_wbusy}),

    .probe1({fdma_rdata[15:0],t_data[15:0],fdma_rvalid,fdma_rbusy,T_S,test_error})

);

system system_i

(.FDMA_S_0_fdma_raddr(fdma_raddr),

.FDMA_S_0_fdma_rareq(fdma_rareq),

.FDMA_S_0_fdma_rbusy(fdma_rbusy),

.FDMA_S_0_fdma_rdata(fdma_rdata),

.FDMA_S_0_fdma_rready(1'b1),

.FDMA_S_0_fdma_rsize(fdma_rsize),

.FDMA_S_0_fdma_rvalid(fdma_rvalid),

.FDMA_S_0_fdma_waddr(fdma_waddr),

.FDMA_S_0_fdma_wareq(fdma_wareq),

.FDMA_S_0_fdma_wbusy(fdma_wbusy),

.FDMA_S_0_fdma_wdata(fdma_wdata),

.FDMA_S_0_fdma_wready(1'b1),

.FDMA_S_0_fdma_wsize(fdma_wsize),

.FDMA_S_0_fdma_wvalid(fdma_wvalid),

.sysclk_clk_n(sysclk_n),

.sysclk_clk_p(sysclk_p),

.ui_clk(ui_clk)

);

endmodule 

`timescale 1ns / 1ps

//////////////////////////////////////////////////////////////////////////////////

/*

Company : Liyang Milian Electronic Technology Co., Ltd.

Brand: 米联客(milianke)

Technical forum：uisrc.com

taobao: osrc.taobao.com

Create Date: 2021/04/25

Module Name: fdma_bram_test_tb

Description:

Copyright: Copyright (c) msxbo

Revision: 1.0

Signal description：

1) _i input

2) _o output

3) _n activ low

4) _dg debug signal

5) _r delay or register

6) _s state mechine

*/

////////////////////////////////////////////////////////////////////////////////

module fdma_bram_test_tb();

reg sysclk_p;

fdma_bram_test fdma_bram_test_inst

(

.sysclk_p(sysclk_p),

.sysclk_n(~sysclk_p)

);

initial begin

sysclk_p = 0;

#100;

end

always #10 sysclk_p = ~sysclk_p;

endmodule