Line 45... |
Line 45... |
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// This testbench verify with SDRAM TOP
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// This testbench verify with SDRAM TOP
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module tb_top;
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module tb_top;
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parameter P_SYS = 10; // 100MHz
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parameter P_SYS = 10; // 200MHz
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parameter P_SDR = 20; // 100MHz
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// General
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// General
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reg RESETN;
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reg RESETN;
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reg sdram_clk;
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reg sdram_clk;
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reg sys_clk;
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initial sys_clk = 0;
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initial sdram_clk = 0;
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initial sdram_clk = 0;
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always #(P_SYS/2) sdram_clk = !sdram_clk;
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always #(P_SYS/2) sys_clk = !sys_clk;
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always #(P_SDR/2) sdram_clk = !sdram_clk;
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parameter dw = 32; // data width
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parameter dw = 32; // data width
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parameter tw = 8; // tag id width
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parameter tw = 8; // tag id width
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parameter bl = 5; // burst_lenght_width
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parameter bl = 5; // burst_lenght_width
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//-------------------------------------------
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//-------------------------------------------
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// Application Interface bus
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// WISH BONE Interface
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//-------------------------------------------
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//-------------------------------------------
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reg app_req ; // Application Request
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//--------------------------------------
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reg [8:0] app_req_len ; // Burst Request length
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// Wish Bone Interface
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wire app_req_ack ; // Application Request Ack
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// -------------------------------------
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reg [29:0] app_req_addr ; // Application Address
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reg wb_stb_i ;
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reg app_req_wr_n ; // 1 -> Read, 0 -> Write
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wire wb_ack_o ;
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reg [dw-1:0] app_wr_data ; // Write Data
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reg [29:0] wb_addr_i ;
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reg [dw/8-1:0] app_wr_en_n ; // Write Enable, Active Low
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reg wb_we_i ; // 1 - Write, 0 - Read
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wire app_rd_valid ; // Read Valid
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reg [dw-1:0] wb_dat_i ;
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wire [dw-1:0] app_rd_data ; // Read Data
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reg [dw/8-1:0] wb_sel_i ; // Byte enable
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wire [dw-1:0] wb_dat_o ;
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reg wb_cyc_i ;
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reg [2:0] wb_cti_i ;
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//--------------------------------------------
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//--------------------------------------------
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// SDRAM I/F
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// SDRAM I/F
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//--------------------------------------------
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//--------------------------------------------
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Line 102... |
Line 111... |
wire [11:0] sdr_addr ; // SDRAM ADRESS
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wire [11:0] sdr_addr ; // SDRAM ADRESS
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wire sdr_init_done ; // SDRAM Init Done
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wire sdr_init_done ; // SDRAM Init Done
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// to fix the sdram interface timing issue
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// to fix the sdram interface timing issue
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wire #(2.0) sdram_clk_d = sdram_clk;
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wire #(2.0) sdram_clk_d = sdram_clk;
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wire #(1.0) pad_clk = sdram_clk_d;
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wire #(1.0) sdram_pad_clk = sdram_clk_d;
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`ifdef SDR_32BIT
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`ifdef SDR_32BIT
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sdrc_core #(.SDR_DW(32),.SDR_BW(4)) u_dut(
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sdrc_top #(.SDR_DW(32),.SDR_BW(4)) u_dut(
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`elsif SDR_16BIT
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`elsif SDR_16BIT
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sdrc_core #(.SDR_DW(16),.SDR_BW(2)) u_dut(
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sdrc_top #(.SDR_DW(16),.SDR_BW(2)) u_dut(
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`else // 8 BIT SDRAM
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`else // 8 BIT SDRAM
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sdrc_core #(.SDR_DW(8),.SDR_BW(1)) u_dut(
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sdrc_top #(.SDR_DW(8),.SDR_BW(1)) u_dut(
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`endif
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`endif
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// System
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// System
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.clk (sdram_clk ),
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.reset_n (RESETN ),
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.pad_clk (pad_clk ),
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`ifdef SDR_32BIT
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`ifdef SDR_32BIT
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.sdr_width (2'b00 ), // 32 BIT SDRAM
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.sdr_width (2'b00 ), // 32 BIT SDRAM
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`elsif SDR_16BIT
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`elsif SDR_16BIT
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.sdr_width (2'b01 ), // 16 BIT SDRAM
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.sdr_width (2'b01 ), // 16 BIT SDRAM
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`else
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`else
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.sdr_width (2'b10 ), // 8 BIT SDRAM
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.sdr_width (2'b10 ), // 8 BIT SDRAM
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`endif
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`endif
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.cfg_colbits (2'b00 ), // 8 Bit Column Address
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.cfg_colbits (2'b00 ), // 8 Bit Column Address
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/* WISH BONE */
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/* Request from app */
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.wb_rst_i (!RESETN ),
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.app_req (app_req ), // Transfer Request
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.wb_clk_i (sys_clk ),
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.app_req_addr (app_req_addr ), // SDRAM Address
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.app_req_addr_mask (29'h1FFF_FFFF ), // Address mask for queue wrap
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.wb_stb_i (wb_stb_i ),
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.app_req_len (app_req_len ), // Burst Length (in 16 bit words)
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.wb_ack_o (wb_ack_o ),
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.app_req_wrap (1'b0 ), // Wrap mode request (xfr_len = 4)
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.wb_addr_i (wb_addr_i ),
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.app_req_wr_n (app_req_wr_n ), // 0 => Write request, 1 => read req
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.wb_we_i (wb_we_i ),
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.app_req_ack (app_req_ack ), // Request has been accepted
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.wb_dat_i (wb_dat_i ),
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.sdr_core_busy_n ( ), // OK to arbitrate next request
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.wb_sel_i (wb_sel_i ),
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.wb_dat_o (wb_dat_o ),
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.app_wr_data (app_wr_data ),
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.wb_cyc_i (wb_cyc_i ),
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.app_wr_en_n (app_wr_en_n ),
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.wb_cti_i (wb_cti_i ),
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.app_rd_data (app_rd_data ),
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.app_rd_valid (app_rd_valid ),
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.app_wr_next_req (app_wr_next_req ),
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.app_req_dma_last (app_req ),
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/* Interface to SDRAMs */
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/* Interface to SDRAMs */
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.sdram_clk (sdram_clk ),
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.sdram_pad_clk (sdram_pad_clk ),
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.sdram_resetn (RESETN ),
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.sdr_cs_n (sdr_cs_n ),
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.sdr_cs_n (sdr_cs_n ),
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.sdr_cke (sdr_cke ),
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.sdr_cke (sdr_cke ),
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.sdr_ras_n (sdr_ras_n ),
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.sdr_ras_n (sdr_ras_n ),
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.sdr_cas_n (sdr_cas_n ),
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.sdr_cas_n (sdr_cas_n ),
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.sdr_we_n (sdr_we_n ),
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.sdr_we_n (sdr_we_n ),
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Line 242... |
Line 247... |
// Test Case
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// Test Case
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/////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////
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initial begin //{
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initial begin //{
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ErrCnt = 0;
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ErrCnt = 0;
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app_req_addr = 0;
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wb_addr_i = 0;
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app_wr_data = 0;
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wb_dat_i = 0;
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app_wr_en_n = 4'hF;
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wb_sel_i = 4'h0;
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app_req_wr_n = 0;
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wb_we_i = 0;
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app_req = 0;
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wb_stb_i = 0;
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app_req_len = 0;
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wb_cyc_i = 0;
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RESETN = 1'h1;
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RESETN = 1'h1;
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#100
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#100
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// Applying reset
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// Applying reset
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Line 301... |
Line 306... |
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task burst_write;
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task burst_write;
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input [31:0] Address;
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input [31:0] Address;
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int i;
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int i;
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begin
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begin
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@ (negedge sdram_clk);
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@ (negedge sys_clk);
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app_req = 1;
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app_wr_en_n = 0;
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app_req_wr_n = 1'b0;
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$display("Write Address: %x, Burst Size: %d",Address,wrdfifo.size);
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$display("Write Address: %x, Burst Size: %d",Address,wrdfifo.size);
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app_req_addr = Address[31:2];
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app_req_len = wrdfifo.size;
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// wait for app_req_ack == 1
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do begin
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@ (posedge sdram_clk);
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end while(app_req_ack == 1'b0);
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@ (negedge sdram_clk);
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app_req = 0;
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for(i=0; i < wrdfifo.size; i++) begin
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for(i=0; i < wrdfifo.size; i++) begin
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app_wr_data = wrdfifo[i];
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wb_stb_i = 1;
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wb_cyc_i = 1;
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wb_we_i = 1;
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wb_sel_i = 4'b1111;
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wb_addr_i = Address[31:2]+i;
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wb_dat_i = wrdfifo[i];
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do begin
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do begin
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@ (posedge sdram_clk);
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@ (posedge sys_clk);
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end while(app_wr_next_req == 1'b0);
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end while(wb_ack_o == 1'b0);
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@ (negedge sdram_clk);
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@ (negedge sys_clk);
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$display("Status: Burst-No: %d Write Address: %x WriteData: %x ",i,Address,app_wr_data);
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$display("Status: Burst-No: %d Write Address: %x WriteData: %x ",i,wb_addr_i,wb_dat_i);
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end
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end
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app_req = 0;
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wb_stb_i = 0;
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app_wr_en_n = 4'hF;
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wb_cyc_i = 0;
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end
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end
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endtask
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endtask
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task burst_read;
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task burst_read;
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input [31:0] Address;
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input [31:0] Address;
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int i,j;
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int i,j;
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reg [31:0] rd_data;
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reg [31:0] rd_data;
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begin
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begin
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@ (negedge sdram_clk);
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@ (negedge sys_clk);
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app_req = 1;
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app_wr_en_n = 0;
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app_req_wr_n = 1;
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app_req_addr = Address[29:2];
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app_req_len = wrdfifo.size;
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// wait for app_req_ack == 1
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do begin
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@ (posedge sdram_clk);
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end while(app_req_ack == 1'b0);
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@ (negedge sdram_clk);
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app_req = 0;
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for(j=0; j < wrdfifo.size; j++) begin
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for(j=0; j < wrdfifo.size; j++) begin
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wait(app_rd_valid == 1);
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wb_stb_i = 1;
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if(app_rd_data !== wrdfifo[j]) begin
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wb_cyc_i = 1;
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$display("READ ERROR: Burst-No: %d Addr: %x Rxp: %x Exd: %x",j,Address+(j*2),app_rd_data,wrdfifo[j]);
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wb_we_i = 0;
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wb_addr_i = Address[31:2]+j;
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do begin
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@ (posedge sys_clk);
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end while(wb_ack_o == 1'b0);
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if(wb_dat_o !== wrdfifo[j]) begin
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$display("READ ERROR: Burst-No: %d Addr: %x Rxp: %x Exd: %x",j,wb_addr_i,wb_dat_o,wrdfifo[j]);
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ErrCnt = ErrCnt+1;
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ErrCnt = ErrCnt+1;
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end else begin
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end else begin
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$display("READ STATUS: Burst-No: %d Addr: %x Rxd: %x",j,Address+(j*2),app_rd_data);
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$display("READ STATUS: Burst-No: %d Addr: %x Rxd: %x",j,wb_addr_i,wb_dat_o);
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end
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end
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@ (posedge sdram_clk);
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@ (negedge sdram_clk);
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@ (negedge sdram_clk);
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end
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end
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wb_stb_i = 0;
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wb_cyc_i = 0;
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end
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end
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endtask
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endtask
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endmodule
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endmodule
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