$date Wed Apr 16 13:26:52 2025 $end $version Icarus Verilog $end $timescale 1ps $end $scope module tb_ultrasonic_fpga $end $var wire 1 ! trig_out $end $var wire 16 " distance [15:0] $end $var reg 1 # clk $end $var reg 1 $ echo $end $var reg 1 % rst $end $var reg 1 & start $end $var reg 64 ' t_end [63:0] $end $var reg 64 ( t_start [63:0] $end $scope module uut $end $var wire 1 # clk $end $var wire 1 $ echo $end $var wire 1 % rst $end $var wire 1 & start $end $var parameter 32 ) CLK_FREQ $end $var parameter 32 * DIST_DIVISOR $end $var parameter 32 + DONE $end $var parameter 32 , IDLE $end $var parameter 32 - MEASURE_ECHO $end $var parameter 32 . TRIG $end $var parameter 32 / TRIG_DURATION_CYCLES $end $var parameter 32 0 WAIT_ECHO $end $var reg 16 1 distance [15:0] $end $var reg 16 2 echo_counter [15:0] $end $var reg 3 3 state [2:0] $end $var reg 9 4 trig_counter [8:0] $end $var reg 1 ! trig_out $end $upscope $end $upscope $end $enddefinitions $end $comment Show the parameter values. $end $dumpall b10 0 b100001110 / b1 . b11 - b0 , b100 + b1 * b1100110111111110011000000 ) $end #0 $dumpvars b0 4 b0 3 b0 2 b0 1 bx ( bx ' 0& 1% 0$ 0# b0 " 0! $end #18000 1# #36000 0# #54000 1# #72000 0# #90000 1# #100000 0% #108000 0# #126000 1# #144000 0# #162000 1# #180000 0# #198000 1# #200000 1& #216000 0# #234000 b1 3 1# #240000 0& #252000 0# #270000 b100001110 ( b1 4 1! 1# #288000 0# #306000 b10 4 1# #324000 0# #342000 b11 4 1# #360000 0# #378000 b100 4 1# #396000 0# #414000 b101 4 1# #432000 0# #450000 b110 4 1# #468000 0# #486000 b111 4 1# #504000 0# #522000 b1000 4 1# #540000 0# #558000 b1001 4 1# #576000 0# #594000 b1010 4 1# #612000 0# #630000 b1011 4 1# #648000 0# #666000 b1100 4 1# #684000 0# #702000 b1101 4 1# #720000 0# #738000 b1110 4 1# #756000 0# #774000 b1111 4 1# #792000 0# #810000 b10000 4 1# #828000 0# #846000 b10001 4 1# #864000 0# #882000 b10010 4 1# #900000 0# #918000 b10011 4 1# #936000 0# #954000 b10100 4 1# #972000 0# #990000 b10101 4 1# #1008000 0# #1026000 b10110 4 1# #1044000 0# #1062000 b10111 4 1# #1080000 0# #1098000 b11000 4 1# #1116000 0# #1134000 b11001 4 1# #1152000 0# #1170000 b11010 4 1# #1188000 0# #1206000 b11011 4 1# #1224000 0# #1242000 b11100 4 1# #1260000 0# #1278000 b11101 4 1# #1296000 0# #1314000 b11110 4 1# #1332000 0# #1350000 b11111 4 1# #1368000 0# #1386000 b100000 4 1# #1404000 0# #1422000 b100001 4 1# #1440000 0# #1458000 b100010 4 1# #1476000 0# #1494000 b100011 4 1# #1512000 0# #1530000 b100100 4 1# #1548000 0# #1566000 b100101 4 1# #1584000 0# #1602000 b100110 4 1# #1620000 0# #1638000 b100111 4 1# #1656000 0# #1674000 b101000 4 1# #1692000 0# #1710000 b101001 4 1# #1728000 0# #1746000 b101010 4 1# #1764000 0# #1782000 b101011 4 1# #1800000 0# #1818000 b101100 4 1# #1836000 0# #1854000 b101101 4 1# #1872000 0# #1890000 b101110 4 1# #1908000 0# #1926000 b101111 4 1# #1944000 0# #1962000 b110000 4 1# #1980000 0# #1998000 b110001 4 1# #2016000 0# #2034000 b110010 4 1# #2052000 0# #2070000 b110011 4 1# #2088000 0# #2106000 b110100 4 1# #2124000 0# #2142000 b110101 4 1# #2160000 0# #2178000 b110110 4 1# #2196000 0# #2214000 b110111 4 1# #2232000 0# #2250000 b111000 4 1# #2268000 0# #2286000 b111001 4 1# #2304000 0# #2322000 b111010 4 1# #2340000 0# #2358000 b111011 4 1# #2376000 0# #2394000 b111100 4 1# #2412000 0# #2430000 b111101 4 1# #2448000 0# #2466000 b111110 4 1# #2484000 0# #2502000 b111111 4 1# #2520000 0# #2538000 b1000000 4 1# #2556000 0# #2574000 b1000001 4 1# #2592000 0# #2610000 b1000010 4 1# #2628000 0# #2646000 b1000011 4 1# #2664000 0# #2682000 b1000100 4 1# #2700000 0# #2718000 b1000101 4 1# #2736000 0# #2754000 b1000110 4 1# #2772000 0# #2790000 b1000111 4 1# #2808000 0# #2826000 b1001000 4 1# #2844000 0# #2862000 b1001001 4 1# #2880000 0# #2898000 b1001010 4 1# #2916000 0# #2934000 b1001011 4 1# #2952000 0# #2970000 b1001100 4 1# #2988000 0# #3006000 b1001101 4 1# #3024000 0# #3042000 b1001110 4 1# #3060000 0# #3078000 b1001111 4 1# #3096000 0# #3114000 b1010000 4 1# #3132000 0# #3150000 b1010001 4 1# #3168000 0# #3186000 b1010010 4 1# #3204000 0# #3222000 b1010011 4 1# #3240000 0# #3258000 b1010100 4 1# #3276000 0# #3294000 b1010101 4 1# #3312000 0# #3330000 b1010110 4 1# #3348000 0# #3366000 b1010111 4 1# #3384000 0# #3402000 b1011000 4 1# #3420000 0# #3438000 b1011001 4 1# #3456000 0# #3474000 b1011010 4 1# #3492000 0# #3510000 b1011011 4 1# #3528000 0# #3546000 b1011100 4 1# #3564000 0# #3582000 b1011101 4 1# #3600000 0# #3618000 b1011110 4 1# #3636000 0# #3654000 b1011111 4 1# #3672000 0# #3690000 b1100000 4 1# #3708000 0# #3726000 b1100001 4 1# #3744000 0# #3762000 b1100010 4 1# #3780000 0# #3798000 b1100011 4 1# #3816000 0# #3834000 b1100100 4 1# #3852000 0# #3870000 b1100101 4 1# #3888000 0# #3906000 b1100110 4 1# #3924000 0# #3942000 b1100111 4 1# #3960000 0# #3978000 b1101000 4 1# #3996000 0# #4014000 b1101001 4 1# #4032000 0# #4050000 b1101010 4 1# #4068000 0# #4086000 b1101011 4 1# #4104000 0# #4122000 b1101100 4 1# #4140000 0# #4158000 b1101101 4 1# #4176000 0# #4194000 b1101110 4 1# #4212000 0# #4230000 b1101111 4 1# #4248000 0# #4266000 b1110000 4 1# #4284000 0# #4302000 b1110001 4 1# #4320000 0# #4338000 b1110010 4 1# #4356000 0# #4374000 b1110011 4 1# #4392000 0# #4410000 b1110100 4 1# #4428000 0# #4446000 b1110101 4 1# #4464000 0# #4482000 b1110110 4 1# #4500000 0# #4518000 b1110111 4 1# #4536000 0# #4554000 b1111000 4 1# #4572000 0# #4590000 b1111001 4 1# #4608000 0# #4626000 b1111010 4 1# #4644000 0# #4662000 b1111011 4 1# #4680000 0# #4698000 b1111100 4 1# #4716000 0# #4734000 b1111101 4 1# #4752000 0# #4770000 b1111110 4 1# #4788000 0# #4806000 b1111111 4 1# #4824000 0# #4842000 b10000000 4 1# #4860000 0# #4878000 b10000001 4 1# #4896000 0# #4914000 b10000010 4 1# #4932000 0# #4950000 b10000011 4 1# #4968000 0# #4986000 b10000100 4 1# #5004000 0# #5022000 b10000101 4 1# #5040000 0# #5058000 b10000110 4 1# #5076000 0# #5094000 b10000111 4 1# #5112000 0# #5130000 b10001000 4 1# #5148000 0# #5166000 b10001001 4 1# #5184000 0# #5202000 b10001010 4 1# #5220000 0# #5238000 b10001011 4 1# #5256000 0# #5274000 b10001100 4 1# #5292000 0# #5310000 b10001101 4 1# #5328000 0# #5346000 b10001110 4 1# #5364000 0# #5382000 b10001111 4 1# #5400000 0# #5418000 b10010000 4 1# #5436000 0# #5454000 b10010001 4 1# #5472000 0# #5490000 b10010010 4 1# #5508000 0# #5526000 b10010011 4 1# #5544000 0# #5562000 b10010100 4 1# #5580000 0# #5598000 b10010101 4 1# #5616000 0# #5634000 b10010110 4 1# #5652000 0# #5670000 b10010111 4 1# #5688000 0# #5706000 b10011000 4 1# #5724000 0# #5742000 b10011001 4 1# #5760000 0# #5778000 b10011010 4 1# #5796000 0# #5814000 b10011011 4 1# #5832000 0# #5850000 b10011100 4 1# #5868000 0# #5886000 b10011101 4 1# #5904000 0# #5922000 b10011110 4 1# #5940000 0# #5958000 b10011111 4 1# #5976000 0# #5994000 b10100000 4 1# #6012000 0# #6030000 b10100001 4 1# #6048000 0# #6066000 b10100010 4 1# #6084000 0# #6102000 b10100011 4 1# #6120000 0# #6138000 b10100100 4 1# #6156000 0# #6174000 b10100101 4 1# #6192000 0# #6210000 b10100110 4 1# #6228000 0# #6246000 b10100111 4 1# #6264000 0# #6282000 b10101000 4 1# #6300000 0# #6318000 b10101001 4 1# #6336000 0# #6354000 b10101010 4 1# #6372000 0# #6390000 b10101011 4 1# #6408000 0# #6426000 b10101100 4 1# #6444000 0# #6462000 b10101101 4 1# #6480000 0# #6498000 b10101110 4 1# #6516000 0# #6534000 b10101111 4 1# #6552000 0# #6570000 b10110000 4 1# #6588000 0# #6606000 b10110001 4 1# #6624000 0# #6642000 b10110010 4 1# #6660000 0# #6678000 b10110011 4 1# #6696000 0# #6714000 b10110100 4 1# #6732000 0# #6750000 b10110101 4 1# #6768000 0# #6786000 b10110110 4 1# #6804000 0# #6822000 b10110111 4 1# #6840000 0# #6858000 b10111000 4 1# #6876000 0# #6894000 b10111001 4 1# #6912000 0# #6930000 b10111010 4 1# #6948000 0# #6966000 b10111011 4 1# #6984000 0# #7002000 b10111100 4 1# #7020000 0# #7038000 b10111101 4 1# #7056000 0# #7074000 b10111110 4 1# #7092000 0# #7110000 b10111111 4 1# #7128000 0# #7146000 b11000000 4 1# #7164000 0# #7182000 b11000001 4 1# #7200000 0# #7218000 b11000010 4 1# #7236000 0# #7254000 b11000011 4 1# #7272000 0# #7290000 b11000100 4 1# #7308000 0# #7326000 b11000101 4 1# #7344000 0# #7362000 b11000110 4 1# #7380000 0# #7398000 b11000111 4 1# #7416000 0# #7434000 b11001000 4 1# #7452000 0# #7470000 b11001001 4 1# #7488000 0# #7506000 b11001010 4 1# #7524000 0# #7542000 b11001011 4 1# #7560000 0# #7578000 b11001100 4 1# #7596000 0# #7614000 b11001101 4 1# #7632000 0# #7650000 b11001110 4 1# #7668000 0# #7686000 b11001111 4 1# #7704000 0# #7722000 b11010000 4 1# #7740000 0# #7758000 b11010001 4 1# #7776000 0# #7794000 b11010010 4 1# #7812000 0# #7830000 b11010011 4 1# #7848000 0# #7866000 b11010100 4 1# #7884000 0# #7902000 b11010101 4 1# #7920000 0# #7938000 b11010110 4 1# #7956000 0# #7974000 b11010111 4 1# #7992000 0# #8010000 b11011000 4 1# #8028000 0# #8046000 b11011001 4 1# #8064000 0# #8082000 b11011010 4 1# #8100000 0# #8118000 b11011011 4 1# #8136000 0# #8154000 b11011100 4 1# #8172000 0# #8190000 b11011101 4 1# #8208000 0# #8226000 b11011110 4 1# #8244000 0# #8262000 b11011111 4 1# #8280000 0# #8298000 b11100000 4 1# #8316000 0# #8334000 b11100001 4 1# #8352000 0# #8370000 b11100010 4 1# #8388000 0# #8406000 b11100011 4 1# #8424000 0# #8442000 b11100100 4 1# #8460000 0# #8478000 b11100101 4 1# #8496000 0# #8514000 b11100110 4 1# #8532000 0# #8550000 b11100111 4 1# #8568000 0# #8586000 b11101000 4 1# #8604000 0# #8622000 b11101001 4 1# #8640000 0# #8658000 b11101010 4 1# #8676000 0# #8694000 b11101011 4 1# #8712000 0# #8730000 b11101100 4 1# #8748000 0# #8766000 b11101101 4 1# #8784000 0# #8802000 b11101110 4 1# #8820000 0# #8838000 b11101111 4 1# #8856000 0# #8874000 b11110000 4 1# #8892000 0# #8910000 b11110001 4 1# #8928000 0# #8946000 b11110010 4 1# #8964000 0# #8982000 b11110011 4 1# #9000000 0# #9018000 b11110100 4 1# #9036000 0# #9054000 b11110101 4 1# #9072000 0# #9090000 b11110110 4 1# #9108000 0# #9126000 b11110111 4 1# #9144000 0# #9162000 b11111000 4 1# #9180000 0# #9198000 b11111001 4 1# #9216000 0# #9234000 b11111010 4 1# #9252000 0# #9270000 b11111011 4 1# #9288000 0# #9306000 b11111100 4 1# #9324000 0# #9342000 b11111101 4 1# #9360000 0# #9378000 b11111110 4 1# #9396000 0# #9414000 b11111111 4 1# #9432000 0# #9450000 b100000000 4 1# #9468000 0# #9486000 b100000001 4 1# #9504000 0# #9522000 b100000010 4 1# #9540000 0# #9558000 b100000011 4 1# #9576000 0# #9594000 b100000100 4 1# #9612000 0# #9630000 b100000101 4 1# #9648000 0# #9666000 b100000110 4 1# #9684000 0# #9702000 b100000111 4 1# #9720000 0# #9738000 b100001000 4 1# #9756000 0# #9774000 b100001001 4 1# #9792000 0# #9810000 b100001010 4 1# #9828000 0# #9846000 b100001011 4 1# #9864000 0# #9882000 b100001100 4 1# #9900000 0# #9918000 b100001101 4 1# #9936000 0# #9954000 b100001110 4 1# #9972000 0# #9990000 b10011100000110 ' b10 3 b0 4 0! 1# #10000000 1$ #10008000 0# #10026000 b11 3 1# #10044000 0# #10062000 b1 2 1# #10080000 0# #10098000 b10 2 1# #10116000 0# #10134000 b11 2 1# #10152000 0# #10170000 b100 2 1# #10188000 0# #10206000 b101 2 1# #10224000 0# #10242000 b110 2 1# #10260000 0# #10278000 b111 2 1# #10296000 0# #10314000 b1000 2 1# #10332000 0# #10350000 b1001 2 1# #10368000 0# #10386000 b1010 2 1# #10404000 0# #10422000 b1011 2 1# #10440000 0# #10458000 b1100 2 1# #10476000 0# #10494000 b1101 2 1# #10512000 0# #10530000 b1110 2 1# #10548000 0# #10566000 b1111 2 1# #10584000 0# #10602000 b10000 2 1# #10620000 0# #10638000 b10001 2 1# #10656000 0# #10674000 b10010 2 1# #10692000 0# #10710000 b10011 2 1# #10728000 0# #10746000 b10100 2 1# #10764000 0# #10782000 b10101 2 1# #10800000 0# #10818000 b10110 2 1# #10836000 0# #10854000 b10111 2 1# #10872000 0# #10890000 b11000 2 1# #10908000 0# #10926000 b11001 2 1# #10944000 0# #10962000 b11010 2 1# #10980000 0# #10998000 b11011 2 1# #11016000 0# #11034000 b11100 2 1# #11052000 0# #11070000 b11101 2 1# #11088000 0# #11106000 b11110 2 1# #11124000 0# #11142000 b11111 2 1# #11160000 0# #11178000 b100000 2 1# #11196000 0# #11214000 b100001 2 1# #11232000 0# #11250000 b100010 2 1# #11268000 0# #11286000 b100011 2 1# #11304000 0# #11322000 b100100 2 1# #11340000 0# #11358000 b100101 2 1# #11376000 0# #11394000 b100110 2 1# #11412000 0# #11430000 b100111 2 1# #11448000 0# #11466000 b101000 2 1# #11484000 0# #11502000 b101001 2 1# #11520000 0# #11538000 b101010 2 1# #11556000 0# #11574000 b101011 2 1# #11592000 0# #11610000 b101100 2 1# #11628000 0# #11646000 b101101 2 1# #11664000 0# #11682000 b101110 2 1# #11700000 0# #11718000 b101111 2 1# #11736000 0# #11754000 b110000 2 1# #11772000 0# #11790000 b110001 2 1# #11808000 0# #11826000 b110010 2 1# #11844000 0# #11862000 b110011 2 1# #11880000 0# #11898000 b110100 2 1# #11916000 0# #11934000 b110101 2 1# #11952000 0# #11970000 b110110 2 1# #11988000 0# #12006000 b110111 2 1# #12024000 0# #12042000 b111000 2 1# #12060000 0# #12078000 b111001 2 1# #12096000 0# #12114000 b111010 2 1# #12132000 0# #12150000 b111011 2 1# #12168000 0# #12186000 b111100 2 1# #12204000 0# #12222000 b111101 2 1# #12240000 0# #12258000 b111110 2 1# #12276000 0# #12294000 b111111 2 1# #12312000 0# #12330000 b1000000 2 1# #12348000 0# #12366000 b1000001 2 1# #12384000 0# #12402000 b1000010 2 1# #12420000 0# #12438000 b1000011 2 1# #12456000 0# #12474000 b1000100 2 1# #12492000 0# #12510000 b1000101 2 1# #12528000 0# #12546000 b1000110 2 1# #12564000 0# #12582000 b1000111 2 1# #12600000 0# #12618000 b1001000 2 1# #12636000 0# #12654000 b1001001 2 1# #12672000 0# #12690000 b1001010 2 1# #12708000 0# #12726000 b1001011 2 1# #12744000 0# #12762000 b1001100 2 1# #12780000 0# #12798000 b1001101 2 1# #12816000 0# #12834000 b1001110 2 1# #12852000 0# #12870000 b1001111 2 1# #12888000 0# #12906000 b1010000 2 1# #12924000 0# #12942000 b1010001 2 1# #12960000 0# #12978000 b1010010 2 1# #12996000 0# #13014000 b1010011 2 1# #13032000 0# #13050000 b1010100 2 1# #13068000 0# #13086000 b1010101 2 1# #13104000 0# #13122000 b1010110 2 1# #13140000 0# #13158000 b1010111 2 1# #13176000 0# #13194000 b1011000 2 1# #13212000 0# #13230000 b1011001 2 1# #13248000 0# #13266000 b1011010 2 1# #13284000 0# #13302000 b1011011 2 1# #13320000 0# #13338000 b1011100 2 1# #13356000 0# #13374000 b1011101 2 1# #13392000 0# #13410000 b1011110 2 1# #13428000 0# #13446000 b1011111 2 1# #13464000 0# #13482000 b1100000 2 1# #13500000 0# #13518000 b1100001 2 1# #13536000 0# #13554000 b1100010 2 1# #13572000 0# #13590000 b1100011 2 1# #13608000 0# #13626000 b1100100 2 1# #13644000 0# #13662000 b1100101 2 1# #13680000 0# #13698000 b1100110 2 1# #13716000 0# #13734000 b1100111 2 1# #13752000 0# #13770000 b1101000 2 1# #13788000 0# #13806000 b1101001 2 1# #13824000 0# #13842000 b1101010 2 1# #13860000 0# #13878000 b1101011 2 1# #13896000 0# #13914000 b1101100 2 1# #13932000 0# #13950000 b1101101 2 1# #13968000 0# #13986000 b1101110 2 1# #14004000 0# #14022000 b1101111 2 1# #14040000 0# #14058000 b1110000 2 1# #14076000 0# #14094000 b1110001 2 1# #14112000 0# #14130000 b1110010 2 1# #14148000 0# #14166000 b1110011 2 1# #14184000 0# #14202000 b1110100 2 1# #14220000 0# #14238000 b1110101 2 1# #14256000 0# #14274000 b1110110 2 1# #14292000 0# #14310000 b1110111 2 1# #14328000 0# #14346000 b1111000 2 1# #14364000 0# #14382000 b1111001 2 1# #14400000 0# #14418000 b1111010 2 1# #14436000 0# #14454000 b1111011 2 1# #14472000 0# #14490000 b1111100 2 1# #14508000 0# #14526000 b1111101 2 1# #14544000 0# #14562000 b1111110 2 1# #14580000 0# #14598000 b1111111 2 1# #14616000 0# #14634000 b10000000 2 1# #14652000 0# #14670000 b10000001 2 1# #14688000 0# #14706000 b10000010 2 1# #14724000 0# #14742000 b10000011 2 1# #14760000 0# #14778000 b10000100 2 1# #14796000 0# #14814000 b10000101 2 1# #14832000 0# #14850000 b10000110 2 1# #14868000 0# #14886000 b10000111 2 1# #14904000 0# #14922000 b10001000 2 1# #14940000 0# #14958000 b10001001 2 1# #14976000 0# #14994000 b10001010 2 1# #15012000 0# #15030000 b10001011 2 1# #15048000 0# #15066000 b10001100 2 1# #15084000 0# #15102000 b10001101 2 1# #15120000 0# #15138000 b10001110 2 1# #15156000 0# #15174000 b10001111 2 1# #15192000 0# #15210000 b10010000 2 1# #15228000 0# #15246000 b10010001 2 1# #15264000 0# #15282000 b10010010 2 1# #15300000 0# #15318000 b10010011 2 1# #15336000 0# #15354000 b10010100 2 1# #15372000 0# #15390000 b10010101 2 1# #15408000 0# #15426000 b10010110 2 1# #15444000 0# #15462000 b10010111 2 1# #15480000 0# #15498000 b10011000 2 1# #15516000 0# #15534000 b10011001 2 1# #15552000 0# #15570000 b10011010 2 1# #15588000 0# #15606000 b10011011 2 1# #15624000 0# #15642000 b10011100 2 1# #15660000 0# #15678000 b10011101 2 1# #15696000 0# #15714000 b10011110 2 1# #15732000 0# #15750000 b10011111 2 1# #15768000 0# #15786000 b10100000 2 1# #15800000 0$ #15804000 0# #15822000 b100 3 b10100000 " b10100000 1 1# #15840000 0# #15858000 b0 3 1# #15876000 0# #15894000 1# #15912000 0# #15930000 1# #15948000 0# #15966000 1# #15984000 0# #16002000 1# #16020000 0# #16038000 1# #16056000 0# #16074000 1# #16092000 0# #16110000 1# #16128000 0# #16146000 1# #16164000 0# #16182000 1# #16200000 0# #16218000 1# #16236000 0# #16254000 1# #16272000 0# #16290000 1# #16300000