| |
| /*********************************************** |
| |
| wire [15:0] strap_in; |
| assign strap_in[`PSTRAP_CLK_SRC] = 2'b00; // System Clock Source wbs/riscv: User clock1 |
| assign strap_in[`PSTRAP_CLK_DIV] = 2'b00; // Clock Division for wbs/riscv : 0 Div |
| assign strap_in[`PSTRAP_UARTM_CFG] = 2'b0; // uart master config control - constant value based on system clock selection |
| assign strap_in[`PSTRAP_QSPI_SRAM] = 1'b1; // QSPI SRAM Mode Selection - Quad |
| assign strap_in[`PSTRAP_QSPI_FLASH] = 2'b10; // QSPI Fash Mode Selection - Quad |
| assign strap_in[`PSTRAP_RISCV_RESET_MODE] = 1'b1; // Riscv Reset control - Removed Riscv on Power On Reset |
| assign strap_in[`PSTRAP_RISCV_CACHE_BYPASS] = 1'b0; // Riscv Cache Bypass: 0 - Cache Enable |
| assign strap_in[`PSTRAP_RISCV_SRAM_CLK_EDGE] = 1'b0; // Riscv SRAM clock edge selection: 0 - Normal |
| assign strap_in[`PSTRAP_CLK_SKEW] = 2'b00; // Skew selection 2'b00 - Default value |
| |
| assign strap_in[`PSTRAP_DEFAULT_VALUE] = 1'b0; // 0 - Normal |
| parameter bit [15:0] PAD_STRAP = (2'b00 << `PSTRAP_CLK_SRC ) | |
| (2'b00 << `PSTRAP_CLK_DIV ) | |
| (1'b1 << `PSTRAP_UARTM_CFG ) | |
| (1'b1 << `PSTRAP_QSPI_SRAM ) | |
| (2'b10 << `PSTRAP_QSPI_FLASH ) | |
| (1'b1 << `PSTRAP_RISCV_RESET_MODE ) | |
| (1'b1 << `PSTRAP_RISCV_CACHE_BYPASS ) | |
| (1'b1 << `PSTRAP_RISCV_SRAM_CLK_EDGE ) | |
| (2'b00 << `PSTRAP_CLK_SKEW ) | |
| (1'b0 << `PSTRAP_DEFAULT_VALUE ) ; |
| ****/ |
| |
| //-------------------------------------------------------- |
| // Pad Pull-up/down initialization based on Boot Mode |
| //--------------------------------------------------------- |
| |
| `ifdef RISC_BOOT // RISCV Based Test case |
| parameter bit [15:0] PAD_STRAP = 16'b0000_0001_1010_0000; |
| `else |
| parameter bit [15:0] PAD_STRAP = 16'b0000_0000_1010_0000; |
| `endif |
| |
| //------------------------------------------------------------- |
| // Variable Decleration |
| //------------------------------------------------------------- |
| |
| reg clock ; |
| reg clock2 ; |
| reg xtal_clk ; |
| reg wb_rst_i ; |
| |
| reg power1, power2; |
| reg power3, power4; |
| |
| // Wishbone Interface |
| reg wbd_ext_cyc_i ; // strobe/request |
| reg wbd_ext_stb_i ; // strobe/request |
| reg [31:0] wbd_ext_adr_i ; // address |
| reg wbd_ext_we_i ; // write |
| reg [31:0] wbd_ext_dat_i ; // data output |
| reg [3:0] wbd_ext_sel_i ; // byte enable |
| |
| wire [31:0] wbd_ext_dat_o ; // data input |
| wire wbd_ext_ack_o ; // acknowlegement |
| wire wbd_ext_err_o ; // error |
| |
| // User I/O |
| wire [37:0] io_oeb ; |
| wire [37:0] io_out ; |
| wire [37:0] io_in ; |
| reg [127:0] la_data_in; |
| |
| reg test_fail ; |
| reg [31:0] write_data ; |
| reg [31:0] read_data ; |
| integer d_risc_id; |
| |
| |
| wire USER_VDD1V8 = 1'b1; |
| wire VSS = 1'b0; |
| |
| //----------------------------------------- |
| // Clock Decleration |
| //----------------------------------------- |
| |
| always #(CLK1_PERIOD/2) clock <= (clock === 1'b0); |
| always #(CLK2_PERIOD/2) clock2 <= (clock2 === 1'b0); |
| always #(XTAL_PERIOD/2) xtal_clk <= (xtal_clk === 1'b0); |
| |
| |
| //----------------------------------------- |
| // Variable Initiatlization |
| //----------------------------------------- |
| initial |
| begin |
| // Run in Fast Sim Mode |
| `ifdef GL |
| force u_top.u_wb_host._10252_.Q= 1'b1; |
| `else |
| force u_top.u_wb_host.u_reg.u_fastsim_buf.X = 1'b1; |
| `endif |
| |
| clock = 0; |
| clock2 = 0; |
| xtal_clk = 0; |
| test_fail = 0; |
| wbd_ext_cyc_i ='h0; // strobe/request |
| wbd_ext_stb_i ='h0; // strobe/request |
| wbd_ext_adr_i ='h0; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='h0; // data output |
| wbd_ext_sel_i ='h0; // byte enable |
| la_data_in = 1; |
| end |
| //----------------------------------------- |
| // DUT Instatiation |
| //----------------------------------------- |
| user_project_wrapper u_top( |
| `ifdef USE_POWER_PINS |
| .vccd1(USER_VDD1V8), // User area 1 1.8V supply |
| .vssd1(VSS), // User area 1 digital ground |
| `endif |
| .wb_clk_i (clock), // System clock |
| .user_clock2 (clock2), // Real-time clock |
| .wb_rst_i (wb_rst_i), // Regular Reset signal |
| |
| .wbs_cyc_i (wbd_ext_cyc_i), // strobe/request |
| .wbs_stb_i (wbd_ext_stb_i), // strobe/request |
| .wbs_adr_i (wbd_ext_adr_i), // address |
| .wbs_we_i (wbd_ext_we_i), // write |
| .wbs_dat_i (wbd_ext_dat_i), // data output |
| .wbs_sel_i (wbd_ext_sel_i), // byte enable |
| |
| .wbs_dat_o (wbd_ext_dat_o), // data input |
| .wbs_ack_o (wbd_ext_ack_o), // acknowlegement |
| |
| |
| // Logic Analyzer Signals |
| .la_data_in (la_data_in) , |
| .la_data_out (), |
| .la_oenb ('0), |
| |
| |
| // IOs |
| .io_in (io_in ) , |
| .io_out (io_out) , |
| .io_oeb (io_oeb) , |
| |
| .user_irq () |
| |
| ); |
| |
| //-------------------------------------------------------- |
| // Apply Reset Sequence and wait for reset completion |
| //------------------------------------------------------- |
| |
| task init; |
| begin |
| //#1 - Apply Reset |
| #1000 wb_rst_i = 0; |
| repeat (10) @(posedge clock); |
| #1000 wb_rst_i = 1; |
| |
| //#3 - Remove Reset |
| #1000 wb_rst_i = 0; |
| repeat (10) @(posedge clock); |
| //#4 - Wait for Power on reset removal |
| wait(u_top.p_reset_n == 1); |
| |
| // #5 - Wait for system reset removal |
| wait(u_top.s_reset_n == 1); // Wait for system reset removal |
| repeat (10) @(posedge clock); |
| |
| end |
| endtask |
| |
| //----------------------------------------------- |
| // Apply user defined strap at power-on |
| //----------------------------------------------- |
| |
| task apply_strap; |
| input [15:0] strap; |
| begin |
| |
| repeat (10) @(posedge clock); |
| //#1 - Apply Reset |
| wb_rst_i = 1; |
| //#2 - Apply Strap |
| force u_top.io_in[36:29] = strap[15:8]; |
| force u_top.io_in[20:13] = strap[7:0]; |
| repeat (10) @(posedge clock); |
| |
| //#3 - Remove Reset |
| wb_rst_i = 0; // Remove Reset |
| |
| //#4 - Wait for Power on reset removal |
| wait(u_top.p_reset_n == 1); |
| |
| // #5 - Release the Strap |
| release u_top.io_in[36:29]; |
| release u_top.io_in[20:13]; |
| |
| // #6 - Wait for system reset removal |
| wait(u_top.s_reset_n == 1); // Wait for system reset removal |
| repeat (10) @(posedge clock); |
| |
| end |
| endtask |
| |
| //--------------------------------------------------------- |
| // Create Pull Up/Down Based on Reset Strap Parameter |
| // System strap are in io_in[13] to [20] and 29 to [36] |
| //--------------------------------------------------------- |
| genvar gCnt; |
| generate |
| for(gCnt=0; gCnt<16; gCnt++) begin : g_strap |
| if(gCnt < 8) begin |
| if(PAD_STRAP[gCnt]) begin |
| pullup(io_in[13+gCnt]); |
| end else begin |
| pulldown(io_in[13+gCnt]); |
| end |
| end else begin |
| if(PAD_STRAP[gCnt]) begin |
| pullup(io_in[29+gCnt-8]); |
| end else begin |
| pulldown(io_in[29+gCnt-8]); |
| end |
| end |
| end |
| // Add Non Strap with pull-up to avoid unkown propagation during gate sim |
| for(gCnt=0; gCnt<13; gCnt++) begin : g_nostrap1 |
| pullup(io_in[gCnt]); |
| end |
| for(gCnt=21; gCnt<29; gCnt++) begin : g_nostrap2 |
| pullup(io_in[gCnt]); |
| end |
| endgenerate |
| |
| `ifdef RISC_BOOT // RISCV Based Test case |
| //------------------------------------------- |
| task wait_riscv_boot; |
| begin |
| // GLBL_CFG_MAIL_BOX used as mail box, each core update boot up handshake at 8 bit |
| // bit[7:0] - core-0 |
| // bit[15:8] - core-1 |
| // bit[23:16] - core-2 |
| // bit[31:24] - core-3 |
| $display("Status: Waiting for RISCV Core Boot ... "); |
| read_data = 0; |
| //while((read_data >> (d_risc_id*8)) != 8'h1) begin |
| while(read_data != 8'h1) begin // Temp fix - Hardcoded to risc_id = 0 |
| wb_user_core_read(`ADDR_SPACE_GLBL+`GLBL_CFG_MAIL_BOX,read_data); |
| repeat (100) @(posedge clock); |
| end |
| |
| $display("Status: RISCV Core is Booted "); |
| |
| end |
| endtask |
| |
| task wait_riscv_exit; |
| begin |
| // GLBL_CFG_MAIL_BOX used as mail box, each core update boot up handshake at 8 bit |
| // bit[7:0] - core-0 |
| // bit[15:8] - core-1 |
| // bit[23:16] - core-2 |
| // bit[31:24] - core-3 |
| $display("Status: Waiting for RISCV Core Boot ... "); |
| read_data = 0; |
| //while((read_data >> (d_risc_id*8)) != 8'hFF) begin |
| while(read_data != 8'hFF) begin |
| wb_user_core_read(`ADDR_SPACE_GLBL+`GLBL_CFG_MAIL_BOX,read_data); |
| repeat (1000) @(posedge clock); |
| end |
| |
| $display("Status: RISCV Core is Booted "); |
| |
| end |
| endtask |
| |
| //----------------------- |
| // Set TB ready indication |
| //----------------------- |
| task set_tb_ready; |
| begin |
| // GLBL_CFG_MAIL_BOX used as mail box, each core update boot up handshake at 8 bit |
| // bit[7:0] - core-0 |
| // bit[15:8] - core-1 |
| // bit[23:16] - core-2 |
| // bit[31:24] - core-3 |
| wb_user_core_write(`ADDR_SPACE_GLBL+`GLBL_CFG_MAIL_BOX,32'h81818181); |
| |
| $display("Status: Set TB Ready Indication"); |
| |
| end |
| endtask |
| |
| `endif |
| |
| //------------------------------- |
| // Wishbone Write |
| //------------------------------- |
| task wb_user_core_write; |
| input [31:0] address; |
| input [31:0] data; |
| begin |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_adr_i =address; // address |
| wbd_ext_we_i ='h1; // write |
| wbd_ext_dat_i =data; // data output |
| wbd_ext_sel_i ='hF; // byte enable |
| wbd_ext_cyc_i ='h1; // strobe/request |
| wbd_ext_stb_i ='h1; // strobe/request |
| wait(wbd_ext_ack_o == 1); |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_cyc_i ='h0; // strobe/request |
| wbd_ext_stb_i ='h0; // strobe/request |
| wbd_ext_adr_i ='h0; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='h0; // data output |
| wbd_ext_sel_i ='h0; // byte enable |
| $display("DEBUG WB USER ACCESS WRITE Address : %x, Data : %x",address,data); |
| repeat (2) @(posedge clock); |
| end |
| endtask |
| |
| |
| //-------------------------------------- |
| // Wishbone Read |
| //-------------------------------------- |
| task wb_user_core_read; |
| input [31:0] address; |
| output [31:0] data; |
| reg [31:0] data; |
| begin |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_adr_i =address; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='0; // data output |
| wbd_ext_sel_i ='hF; // byte enable |
| wbd_ext_cyc_i ='h1; // strobe/request |
| wbd_ext_stb_i ='h1; // strobe/request |
| wait(wbd_ext_ack_o == 1); |
| repeat (1) @(negedge clock); |
| data = wbd_ext_dat_o; |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_cyc_i ='h0; // strobe/request |
| wbd_ext_stb_i ='h0; // strobe/request |
| wbd_ext_adr_i ='h0; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='h0; // data output |
| wbd_ext_sel_i ='h0; // byte enable |
| $display("DEBUG WB USER ACCESS READ Address : %x, Data : %x",address,data); |
| repeat (2) @(posedge clock); |
| end |
| endtask |
| |
| |
| //-------------------------------------- |
| // Wishbone Read and compare |
| //-------------------------------------- |
| task wb_user_core_read_check; |
| input [31:0] address; |
| output [31:0] data; |
| input [31:0] cmp_data; |
| reg [31:0] data; |
| begin |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_adr_i =address; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='0; // data output |
| wbd_ext_sel_i ='hF; // byte enable |
| wbd_ext_cyc_i ='h1; // strobe/request |
| wbd_ext_stb_i ='h1; // strobe/request |
| wait(wbd_ext_ack_o == 1); |
| repeat (1) @(negedge clock); |
| data = wbd_ext_dat_o; |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_cyc_i ='h0; // strobe/request |
| wbd_ext_stb_i ='h0; // strobe/request |
| wbd_ext_adr_i ='h0; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='h0; // data output |
| wbd_ext_sel_i ='h0; // byte enable |
| if(data !== cmp_data) begin |
| $display("ERROR : WB USER ACCESS READ Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data); |
| test_fail = 1; |
| end else begin |
| $display("STATUS: WB USER ACCESS READ Address : 0x%x, Data : 0x%x",address,data); |
| end |
| repeat (2) @(posedge clock); |
| end |
| endtask |
| |
| |
| task wb_user_core_read_cmp; |
| input [31:0] address; |
| input [31:0] cmp_data; |
| reg [31:0] data; |
| begin |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_adr_i =address; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='0; // data output |
| wbd_ext_sel_i ='hF; // byte enable |
| wbd_ext_cyc_i ='h1; // strobe/request |
| wbd_ext_stb_i ='h1; // strobe/request |
| wait(wbd_ext_ack_o == 1); |
| repeat (1) @(negedge clock); |
| data = wbd_ext_dat_o; |
| repeat (1) @(posedge clock); |
| #1; |
| wbd_ext_cyc_i ='h0; // strobe/request |
| wbd_ext_stb_i ='h0; // strobe/request |
| wbd_ext_adr_i ='h0; // address |
| wbd_ext_we_i ='h0; // write |
| wbd_ext_dat_i ='h0; // data output |
| wbd_ext_sel_i ='h0; // byte enable |
| if(data !== cmp_data) begin |
| $display("ERROR : WB USER ACCESS READ Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data); |
| test_fail = 1; |
| end else begin |
| $display("STATUS: WB USER ACCESS READ Address : 0x%x, Data : 0x%x",address,data); |
| end |
| repeat (2) @(posedge clock); |
| end |
| endtask |
| |
| /************************************************************************* |
| * This is Baud Rate to clock divider conversion for Test Bench |
| * Note: DUT uses 16x baud clock, where are test bench uses directly |
| * baud clock, Due to 16x Baud clock requirement at RTL, there will be |
| * some resolution loss, we expect at lower baud rate this resolution |
| * loss will be less. For Quick simulation perpose higher baud rate used |
| * *************************************************************************/ |
| task tb_set_uart_baud; |
| input [31:0] ref_clk; |
| input [31:0] baud_rate; |
| output [31:0] baud_div; |
| reg [31:0] baud_div; |
| begin |
| // for 230400 Baud = (50Mhz/230400) = 216.7 |
| baud_div = ref_clk/baud_rate; // Get the Bit Baud rate |
| // Baud 16x = 216/16 = 13 |
| baud_div = baud_div/16; // To find the RTL baud 16x div value to find similar resolution loss in test bench |
| // Test bench baud clock , 16x of above value |
| // 13 * 16 = 208, |
| // (Note if you see original value was 216, now it's 208 ) |
| baud_div = baud_div * 16; |
| // Test bench half cycle counter to toggle it |
| // 208/2 = 104 |
| baud_div = baud_div/2; |
| //As counter run's from 0 , substract from 1 |
| baud_div = baud_div-1; |
| end |
| endtask |
| |
| /************************************************************************* |
| * This is I2C Prescale value computation logic |
| * Note: from I2c Logic 3 Prescale value SCL = 0, and 2 Prescale value SCL=1 |
| * Filtering logic uses two sample of Precale/4-1 period. |
| * I2C Clock = System Clock / ((5*(Prescale-1)) + (2 * ((Prescale/4)-1))) |
| * for 50Mhz system clock, 400Khz I2C clock |
| * 400,000 = 50,000,000 * (5*(Prescale-1) + 2*(Prescale/4+1)+2) |
| * 5*Prescale -5 + 2*Prescale/4 + 2 + 2= 50,000,000/400,000 |
| * 5*prescale -5 + Prescale/2 + 4 = 125 |
| * (10*prescale+Prescale)/2 - 1 = 125 |
| * (11 *Prescale)/2 = 125+1 |
| * Prescale = 126*2/11 |
| |
| * *************************************************************************/ |
| task tb_set_i2c_prescale; |
| input [31:0] ref_clk; |
| input [31:0] rate; |
| output [15:0] prescale; |
| reg [15:0] prescale; |
| begin |
| prescale = ref_clk/rate; |
| prescale = prescale +1; |
| prescale = (prescale *2)/11; |
| end |
| endtask |
| |
| /** |
| `ifdef GL |
| //----------------------------------------------------------------------------- |
| // RISC IMEM amd DMEM Monitoring TASK |
| //----------------------------------------------------------------------------- |
| |
| `define RISC_CORE user_uart_tb.u_top.u_core.u_riscv_top |
| |
| always@(posedge `RISC_CORE.wb_clk) begin |
| if(`RISC_CORE.wbd_imem_ack_i) |
| $display("RISCV-DEBUG => IMEM ADDRESS: %x Read Data : %x", `RISC_CORE.wbd_imem_adr_o,`RISC_CORE.wbd_imem_dat_i); |
| if(`RISC_CORE.wbd_dmem_ack_i && `RISC_CORE.wbd_dmem_we_o) |
| $display("RISCV-DEBUG => DMEM ADDRESS: %x Write Data: %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_o); |
| if(`RISC_CORE.wbd_dmem_ack_i && !`RISC_CORE.wbd_dmem_we_o) |
| $display("RISCV-DEBUG => DMEM ADDRESS: %x READ Data : %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_i); |
| end |
| |
| `endif |
| **/ |
| |
