diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/tb/tb_csprng_fifo.v | 121 |
1 files changed, 75 insertions, 46 deletions
diff --git a/src/tb/tb_csprng_fifo.v b/src/tb/tb_csprng_fifo.v index 2c4543d..a1bf73c 100644 --- a/src/tb/tb_csprng_fifo.v +++ b/src/tb/tb_csprng_fifo.v @@ -282,8 +282,51 @@ module tb_csprng_fifo(); // // Writes a 512 bit data word into the fifo. //---------------------------------------------------------------- - task write_w512(input [511 : 0] w512); + task write_w512(input [7 : 0] b); + reg [511 : 0] w512; + reg [31 : 0] w00; + reg [31 : 0] w01; + reg [31 : 0] w02; + reg [31 : 0] w03; + reg [31 : 0] w04; + reg [31 : 0] w05; + reg [31 : 0] w06; + reg [31 : 0] w07; + reg [31 : 0] w08; + reg [31 : 0] w09; + reg [31 : 0] w10; + reg [31 : 0] w11; + reg [31 : 0] w12; + reg [31 : 0] w13; + reg [31 : 0] w14; + reg [31 : 0] w15; begin + w00 = {(b + 8'd15), (b + 8'd15), (b + 8'd15), (b + 8'd15)}; + w01 = {(b + 8'd14), (b + 8'd14), (b + 8'd14), (b + 8'd14)}; + w02 = {(b + 8'd13), (b + 8'd13), (b + 8'd13), (b + 8'd13)}; + w03 = {(b + 8'd12), (b + 8'd12), (b + 8'd12), (b + 8'd12)}; + w04 = {(b + 8'd11), (b + 8'd11), (b + 8'd11), (b + 8'd11)}; + w05 = {(b + 8'd10), (b + 8'd10), (b + 8'd10), (b + 8'd10)}; + w06 = {(b + 8'd09), (b + 8'd09), (b + 8'd09), (b + 8'd09)}; + w07 = {(b + 8'd08), (b + 8'd08), (b + 8'd08), (b + 8'd08)}; + + w08 = {(b + 8'd07), (b + 8'd07), (b + 8'd07), (b + 8'd07)}; + w09 = {(b + 8'd06), (b + 8'd06), (b + 8'd06), (b + 8'd06)}; + w10 = {(b + 8'd05), (b + 8'd05), (b + 8'd05), (b + 8'd05)}; + w11 = {(b + 8'd04), (b + 8'd04), (b + 8'd04), (b + 8'd04)}; + w12 = {(b + 8'd03), (b + 8'd03), (b + 8'd03), (b + 8'd03)}; + w13 = {(b + 8'd02), (b + 8'd02), (b + 8'd02), (b + 8'd02)}; + w14 = {(b + 8'd01), (b + 8'd01), (b + 8'd01), (b + 8'd01)}; + w15 = {(b + 8'd00), (b + 8'd00), (b + 8'd00), (b + 8'd00)}; + + w512 = {w00, w01, w02, w03, w04, w05, w06, w07, + w08, w09, w10, w11, w12, w13, w14, w15}; + + wait_more_data(); + + dump_dut_state(); + dump_fifo(); + $display("writing to fifo: 0x%0128x", w512); tb_csprng_data = w512; tb_csprng_data_valid = 1; @@ -294,6 +337,22 @@ module tb_csprng_fifo(); //---------------------------------------------------------------- + // read_w32() + // + // read a 32 bit data word from the fifo. + //---------------------------------------------------------------- + task read_w32(); + begin + $display("*** Reading from the fifo: 0x%08x", tb_rnd_data); + tb_rnd_ack = 1; + #(2 * CLK_PERIOD); + tb_rnd_ack = 0; + dump_dut_state(); + end + endtask // read_w32 + + + //---------------------------------------------------------------- // fifo_test() // // Writes a number of 512-bit words to the FIFO and then @@ -303,23 +362,6 @@ module tb_csprng_fifo(); task fifo_test(); reg [7 : 0] i; reg [7 : 0] j; - reg [511 : 0] w512; - reg [31 : 0] w00; - reg [31 : 0] w01; - reg [31 : 0] w02; - reg [31 : 0] w03; - reg [31 : 0] w04; - reg [31 : 0] w05; - reg [31 : 0] w06; - reg [31 : 0] w07; - reg [31 : 0] w08; - reg [31 : 0] w09; - reg [31 : 0] w10; - reg [31 : 0] w11; - reg [31 : 0] w12; - reg [31 : 0] w13; - reg [31 : 0] w14; - reg [31 : 0] w15; begin $display("*** Test of FIFO by loading known data and then reading out."); @@ -330,35 +372,9 @@ module tb_csprng_fifo(); i = 8'd0; // Filling up the memory with data. - for (j = 0 ; j < 3 ; j = j + 1) + for (j = 0 ; j < 4 ; j = j + 1) begin - w00 = {(i + 8'd15), (i + 8'd15), (i + 8'd15), (i + 8'd15)}; - w01 = {(i + 8'd14), (i + 8'd14), (i + 8'd14), (i + 8'd14)}; - w02 = {(i + 8'd13), (i + 8'd13), (i + 8'd13), (i + 8'd13)}; - w03 = {(i + 8'd12), (i + 8'd12), (i + 8'd12), (i + 8'd12)}; - w04 = {(i + 8'd11), (i + 8'd11), (i + 8'd11), (i + 8'd11)}; - w05 = {(i + 8'd10), (i + 8'd10), (i + 8'd10), (i + 8'd10)}; - w06 = {(i + 8'd09), (i + 8'd09), (i + 8'd09), (i + 8'd09)}; - w07 = {(i + 8'd08), (i + 8'd08), (i + 8'd08), (i + 8'd08)}; - - w08 = {(i + 8'd07), (i + 8'd07), (i + 8'd07), (i + 8'd07)}; - w09 = {(i + 8'd06), (i + 8'd06), (i + 8'd06), (i + 8'd06)}; - w10 = {(i + 8'd05), (i + 8'd05), (i + 8'd05), (i + 8'd05)}; - w11 = {(i + 8'd04), (i + 8'd04), (i + 8'd04), (i + 8'd04)}; - w12 = {(i + 8'd03), (i + 8'd03), (i + 8'd03), (i + 8'd03)}; - w13 = {(i + 8'd02), (i + 8'd02), (i + 8'd02), (i + 8'd02)}; - w14 = {(i + 8'd01), (i + 8'd01), (i + 8'd01), (i + 8'd01)}; - w15 = {(i + 8'd00), (i + 8'd00), (i + 8'd00), (i + 8'd00)}; - - w512 = {w00, w01, w02, w03, w04, w05, w06, w07, - w08, w09, w10, w11, w12, w13, w14, w15}; - - wait_more_data(); - - dump_dut_state(); - dump_fifo(); - - write_w512(w512); + write_w512(i); #(2 * CLK_PERIOD); i = i + 16; end @@ -366,6 +382,19 @@ module tb_csprng_fifo(); dump_dut_state(); dump_fifo(); + // Read out a number of words from the fifo. + for (j = 0 ; j < 17 ; j = j + 1) + begin + read_w32(); + end + + dump_dut_state(); + dump_fifo(); + + // Write another 512-bit word into the fifo. + i = 8'd4; + + end endtask // init_sim |