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November 27, 2011 00:26
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This is how we Generate Verilog Luts using python!
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| import math | |
| import random | |
| def generateSineTable(max_dac_val=63.0, steps_per_cycle=256): | |
| sine_lut = []; | |
| for r in range(0, steps_per_cycle): | |
| sine_lut.append((max_dac_val/2) * (math.sin(r*2*math.pi/steps_per_cycle) + 1)) | |
| return sine_lut | |
| def generateTriangleWave(max_dac_val=63.0, steps_per_cycle=256): | |
| tri_lut = []; | |
| for r in range(0, steps_per_cycle/2): | |
| tri_lut.append(r*max_dac_val*2/steps_per_cycle) | |
| for r in range(steps_per_cycle/2, steps_per_cycle): | |
| tri_lut.append((steps_per_cycle-r)*max_dac_val*2/steps_per_cycle) | |
| return tri_lut | |
| def generateSawTooth(max_dac_val=63.0, steps_per_cycle=256, neg=0): | |
| sawtooth_lut = [] | |
| for r in range(0, steps_per_cycle): | |
| sawtooth_lut.append(abs(neg*steps_per_cycle - r)*max_dac_val/steps_per_cycle) | |
| return sawtooth_lut | |
| def generateSquare(max_dac_val=63.0, steps_per_cycle=256): | |
| square_lut = [] | |
| for r in range(0, steps_per_cycle/2): square_lut.append(0) | |
| for r in range(steps_per_cycle/2, steps_per_cycle): square_lut.append(max_dac_val) | |
| return square_lut | |
| def generateNoise(max_dac_val=63.0, steps_per_cycle=256): | |
| noise_lut = [] | |
| for r in range(0, steps_per_cycle): noise_lut.append(random.randint(0,max_dac_val)) | |
| return noise_lut | |
| def generateVerilogLUT(module_name, bit_width, step_width, some_lut): | |
| print "module %s ( step, val );" % (module_name) | |
| print "\tinput [%i:0] step;" % step_width | |
| print "\toutput [%i:0] val;" % bit_width | |
| print "\n\treg [%i:0] val;" % bit_width | |
| print "\talways @ (step) begin" | |
| print "\t\tcase (step)" | |
| for i in range(0, len(some_lut)): | |
| print "\t\t\t%i'd%i: val <= %i'd%i;" % (step_width, i, bit_width, round(some_lut[i])) | |
| print "\t\tendcase" | |
| print "\tend" | |
| print "endmodule" | |
| ## Example output | |
| generateVerilogLUT("Sine_LUT", 6, 8, generateSineTable(63,256)) | |
| # module Sine_LUT ( step, val ); | |
| # input [8:0] step; | |
| # output [6:0] val; | |
| # | |
| # reg [6:0] val; | |
| # always @ (step) begin | |
| # case (step) | |
| # 8'd0: val <= 6'd31; | |
| # 8'd1: val <= 6'd32; | |
| # 8'd2: val <= 6'd33; | |
| # 8'd3: val <= 6'd33; | |
| # 8'd4: val <= 6'd34; | |
| # 8'd5: val <= 6'd35; | |
| # 8'd6: val <= 6'd36; | |
| # 8'd7: val <= 6'd36; | |
| # 8'd8: val <= 6'd37; | |
| # 8'd9: val <= 6'd38; | |
| # 8'd10: val <= 6'd39; | |
| # 8'd11: val <= 6'd39; | |
| # 8'd12: val <= 6'd40; | |
| # 8'd13: val <= 6'd41; | |
| # 8'd14: val <= 6'd41; | |
| # 8'd15: val <= 6'd42; | |
| # 8'd16: val <= 6'd43; | |
| # 8'd17: val <= 6'd44; | |
| # 8'd18: val <= 6'd44; | |
| # 8'd19: val <= 6'd45; | |
| # 8'd20: val <= 6'd46; | |
| # 8'd21: val <= 6'd46; | |
| # 8'd22: val <= 6'd47; | |
| # 8'd23: val <= 6'd48; | |
| # 8'd24: val <= 6'd48; | |
| # 8'd25: val <= 6'd49; | |
| # 8'd26: val <= 6'd49; | |
| # 8'd27: val <= 6'd50; | |
| # 8'd28: val <= 6'd51; | |
| # 8'd29: val <= 6'd51; | |
| # 8'd30: val <= 6'd52; | |
| # 8'd31: val <= 6'd52; | |
| # 8'd32: val <= 6'd53; | |
| # 8'd33: val <= 6'd53; | |
| # 8'd34: val <= 6'd54; | |
| # 8'd35: val <= 6'd54; | |
| # 8'd36: val <= 6'd55; | |
| # 8'd37: val <= 6'd55; | |
| # 8'd38: val <= 6'd56; | |
| # 8'd39: val <= 6'd56; | |
| # 8'd40: val <= 6'd57; | |
| # 8'd41: val <= 6'd57; | |
| # 8'd42: val <= 6'd58; | |
| # 8'd43: val <= 6'd58; | |
| # 8'd44: val <= 6'd58; | |
| # 8'd45: val <= 6'd59; | |
| # 8'd46: val <= 6'd59; | |
| # 8'd47: val <= 6'd59; | |
| # 8'd48: val <= 6'd60; | |
| # 8'd49: val <= 6'd60; | |
| # 8'd50: val <= 6'd60; | |
| # 8'd51: val <= 6'd60; | |
| # 8'd52: val <= 6'd61; | |
| # 8'd53: val <= 6'd61; | |
| # 8'd54: val <= 6'd61; | |
| # 8'd55: val <= 6'd61; | |
| # 8'd56: val <= 6'd61; | |
| # 8'd57: val <= 6'd62; | |
| # 8'd58: val <= 6'd62; | |
| # 8'd59: val <= 6'd62; | |
| # 8'd60: val <= 6'd62; | |
| # 8'd61: val <= 6'd62; | |
| # 8'd62: val <= 6'd62; | |
| # 8'd63: val <= 6'd62; | |
| # 8'd64: val <= 6'd62; | |
| # 8'd65: val <= 6'd62; | |
| # 8'd66: val <= 6'd62; | |
| # 8'd67: val <= 6'd62; | |
| # 8'd68: val <= 6'd62; | |
| # 8'd69: val <= 6'd62; | |
| # 8'd70: val <= 6'd62; | |
| # 8'd71: val <= 6'd62; | |
| # 8'd72: val <= 6'd61; | |
| # 8'd73: val <= 6'd61; | |
| # 8'd74: val <= 6'd61; | |
| # 8'd75: val <= 6'd61; | |
| # 8'd76: val <= 6'd61; | |
| # 8'd77: val <= 6'd60; | |
| # 8'd78: val <= 6'd60; | |
| # 8'd79: val <= 6'd60; | |
| # 8'd80: val <= 6'd60; | |
| # 8'd81: val <= 6'd59; | |
| # 8'd82: val <= 6'd59; | |
| # 8'd83: val <= 6'd59; | |
| # 8'd84: val <= 6'd58; | |
| # 8'd85: val <= 6'd58; | |
| # 8'd86: val <= 6'd58; | |
| # 8'd87: val <= 6'd57; | |
| # 8'd88: val <= 6'd57; | |
| # 8'd89: val <= 6'd56; | |
| # 8'd90: val <= 6'd56; | |
| # 8'd91: val <= 6'd55; | |
| # 8'd92: val <= 6'd55; | |
| # 8'd93: val <= 6'd54; | |
| # 8'd94: val <= 6'd54; | |
| # 8'd95: val <= 6'd53; | |
| # 8'd96: val <= 6'd53; | |
| # 8'd97: val <= 6'd52; | |
| # 8'd98: val <= 6'd52; | |
| # 8'd99: val <= 6'd51; | |
| # 8'd100: val <= 6'd51; | |
| # 8'd101: val <= 6'd50; | |
| # 8'd102: val <= 6'd49; | |
| # 8'd103: val <= 6'd49; | |
| # 8'd104: val <= 6'd48; | |
| # 8'd105: val <= 6'd48; | |
| # 8'd106: val <= 6'd47; | |
| # 8'd107: val <= 6'd46; | |
| # 8'd108: val <= 6'd46; | |
| # 8'd109: val <= 6'd45; | |
| # 8'd110: val <= 6'd44; | |
| # 8'd111: val <= 6'd44; | |
| # 8'd112: val <= 6'd43; | |
| # 8'd113: val <= 6'd42; | |
| # 8'd114: val <= 6'd41; | |
| # 8'd115: val <= 6'd41; | |
| # 8'd116: val <= 6'd40; | |
| # 8'd117: val <= 6'd39; | |
| # 8'd118: val <= 6'd39; | |
| # 8'd119: val <= 6'd38; | |
| # 8'd120: val <= 6'd37; | |
| # 8'd121: val <= 6'd36; | |
| # 8'd122: val <= 6'd36; | |
| # 8'd123: val <= 6'd35; | |
| # 8'd124: val <= 6'd34; | |
| # 8'd125: val <= 6'd33; | |
| # 8'd126: val <= 6'd33; | |
| # 8'd127: val <= 6'd32; | |
| # 8'd128: val <= 6'd31; | |
| # 8'd129: val <= 6'd30; | |
| # 8'd130: val <= 6'd29; | |
| # 8'd131: val <= 6'd29; | |
| # 8'd132: val <= 6'd28; | |
| # 8'd133: val <= 6'd27; | |
| # 8'd134: val <= 6'd26; | |
| # 8'd135: val <= 6'd26; | |
| # 8'd136: val <= 6'd25; | |
| # 8'd137: val <= 6'd24; | |
| # 8'd138: val <= 6'd23; | |
| # 8'd139: val <= 6'd23; | |
| # 8'd140: val <= 6'd22; | |
| # 8'd141: val <= 6'd21; | |
| # 8'd142: val <= 6'd21; | |
| # 8'd143: val <= 6'd20; | |
| # 8'd144: val <= 6'd19; | |
| # 8'd145: val <= 6'd18; | |
| # 8'd146: val <= 6'd18; | |
| # 8'd147: val <= 6'd17; | |
| # 8'd148: val <= 6'd16; | |
| # 8'd149: val <= 6'd16; | |
| # 8'd150: val <= 6'd15; | |
| # 8'd151: val <= 6'd14; | |
| # 8'd152: val <= 6'd14; | |
| # 8'd153: val <= 6'd13; | |
| # 8'd154: val <= 6'd13; | |
| # 8'd155: val <= 6'd12; | |
| # 8'd156: val <= 6'd11; | |
| # 8'd157: val <= 6'd11; | |
| # 8'd158: val <= 6'd10; | |
| # 8'd159: val <= 6'd10; | |
| # 8'd160: val <= 6'd9; | |
| # 8'd161: val <= 6'd9; | |
| # 8'd162: val <= 6'd8; | |
| # 8'd163: val <= 6'd8; | |
| # 8'd164: val <= 6'd7; | |
| # 8'd165: val <= 6'd7; | |
| # 8'd166: val <= 6'd6; | |
| # 8'd167: val <= 6'd6; | |
| # 8'd168: val <= 6'd5; | |
| # 8'd169: val <= 6'd5; | |
| # 8'd170: val <= 6'd4; | |
| # 8'd171: val <= 6'd4; | |
| # 8'd172: val <= 6'd4; | |
| # 8'd173: val <= 6'd3; | |
| # 8'd174: val <= 6'd3; | |
| # 8'd175: val <= 6'd3; | |
| # 8'd176: val <= 6'd2; | |
| # 8'd177: val <= 6'd2; | |
| # 8'd178: val <= 6'd2; | |
| # 8'd179: val <= 6'd2; | |
| # 8'd180: val <= 6'd1; | |
| # 8'd181: val <= 6'd1; | |
| # 8'd182: val <= 6'd1; | |
| # 8'd183: val <= 6'd1; | |
| # 8'd184: val <= 6'd1; | |
| # 8'd185: val <= 6'd0; | |
| # 8'd186: val <= 6'd0; | |
| # 8'd187: val <= 6'd0; | |
| # 8'd188: val <= 6'd0; | |
| # 8'd189: val <= 6'd0; | |
| # 8'd190: val <= 6'd0; | |
| # 8'd191: val <= 6'd0; | |
| # 8'd192: val <= 6'd0; | |
| # 8'd193: val <= 6'd0; | |
| # 8'd194: val <= 6'd0; | |
| # 8'd195: val <= 6'd0; | |
| # 8'd196: val <= 6'd0; | |
| # 8'd197: val <= 6'd0; | |
| # 8'd198: val <= 6'd0; | |
| # 8'd199: val <= 6'd0; | |
| # 8'd200: val <= 6'd1; | |
| # 8'd201: val <= 6'd1; | |
| # 8'd202: val <= 6'd1; | |
| # 8'd203: val <= 6'd1; | |
| # 8'd204: val <= 6'd1; | |
| # 8'd205: val <= 6'd2; | |
| # 8'd206: val <= 6'd2; | |
| # 8'd207: val <= 6'd2; | |
| # 8'd208: val <= 6'd2; | |
| # 8'd209: val <= 6'd3; | |
| # 8'd210: val <= 6'd3; | |
| # 8'd211: val <= 6'd3; | |
| # 8'd212: val <= 6'd4; | |
| # 8'd213: val <= 6'd4; | |
| # 8'd214: val <= 6'd4; | |
| # 8'd215: val <= 6'd5; | |
| # 8'd216: val <= 6'd5; | |
| # 8'd217: val <= 6'd6; | |
| # 8'd218: val <= 6'd6; | |
| # 8'd219: val <= 6'd7; | |
| # 8'd220: val <= 6'd7; | |
| # 8'd221: val <= 6'd8; | |
| # 8'd222: val <= 6'd8; | |
| # 8'd223: val <= 6'd9; | |
| # 8'd224: val <= 6'd9; | |
| # 8'd225: val <= 6'd10; | |
| # 8'd226: val <= 6'd10; | |
| # 8'd227: val <= 6'd11; | |
| # 8'd228: val <= 6'd11; | |
| # 8'd229: val <= 6'd12; | |
| # 8'd230: val <= 6'd13; | |
| # 8'd231: val <= 6'd13; | |
| # 8'd232: val <= 6'd14; | |
| # 8'd233: val <= 6'd14; | |
| # 8'd234: val <= 6'd15; | |
| # 8'd235: val <= 6'd16; | |
| # 8'd236: val <= 6'd16; | |
| # 8'd237: val <= 6'd17; | |
| # 8'd238: val <= 6'd18; | |
| # 8'd239: val <= 6'd18; | |
| # 8'd240: val <= 6'd19; | |
| # 8'd241: val <= 6'd20; | |
| # 8'd242: val <= 6'd21; | |
| # 8'd243: val <= 6'd21; | |
| # 8'd244: val <= 6'd22; | |
| # 8'd245: val <= 6'd23; | |
| # 8'd246: val <= 6'd23; | |
| # 8'd247: val <= 6'd24; | |
| # 8'd248: val <= 6'd25; | |
| # 8'd249: val <= 6'd26; | |
| # 8'd250: val <= 6'd26; | |
| # 8'd251: val <= 6'd27; | |
| # 8'd252: val <= 6'd28; | |
| # 8'd253: val <= 6'd29; | |
| # 8'd254: val <= 6'd29; | |
| # 8'd255: val <= 6'd30; | |
| # endcase | |
| # end | |
| # endmodule |
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