Added ascii hex file generator script

Author: pConst

scripts/ascii_hex_writer.py

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+#!/usr/bin/env python
+# coding: utf-8
+
+# author: Konstantin Pavlov
+# email:  pavlovconst@gmail.com
+
+# boilerplate script to generate ASCII hex files to initialize RAMs in Verilog
+
+import math
+import os
+
+# settings =====================================================================
+N = 128
+tablename = "sin"
+filename = tablename + ".hex"
+
+# main =========================================================================
+if os.path.exists(filename):
+  os.remove(filename)
+  print("Old file version removed")
+
+f = open(filename, "x")
+f.write("// ascii hex file for " + tablename + " function\n\n")
+
+for i in range(0, N):
+    # computing and scaling
+    rad = math.pi/4/N*i
+    val = math.floor(math.sin(rad) * 256)
+    # formatting to HEX string of specified length
+    val_str = format(val, "#06x")
+    # additional prefix
+    prefix_str = format(i, "#04x")
+    # cutting '0x' prefix away
+    f.write(prefix_str[2:] + "_" + val_str[2:] + "\n")
+
+f.close()
+

scripts/ascii_hex_writer_examples/cos128.hex

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+// ascii hex file for cos function
+
+00_0100
+01_00ff
+02_00ff
+03_00ff
+04_00ff
+05_00ff
+06_00ff
+07_00ff
+08_00ff
+09_00ff
+0a_00ff
+0b_00ff
+0c_00ff
+0d_00ff
+0e_00ff
+0f_00fe
+10_00fe
+11_00fe
+12_00fe
+13_00fe
+14_00fe
+15_00fd
+16_00fd
+17_00fd
+18_00fd
+19_00fc
+1a_00fc
+1b_00fc
+1c_00fc
+1d_00fb
+1e_00fb
+1f_00fb
+20_00fb
+21_00fa
+22_00fa
+23_00fa
+24_00f9
+25_00f9
+26_00f9
+27_00f8
+28_00f8
+29_00f7
+2a_00f7
+2b_00f7
+2c_00f6
+2d_00f6
+2e_00f5
+2f_00f5
+30_00f4
+31_00f4
+32_00f4
+33_00f3
+34_00f3
+35_00f2
+36_00f2
+37_00f1
+38_00f1
+39_00f0
+3a_00ef
+3b_00ef
+3c_00ee
+3d_00ee
+3e_00ed
+3f_00ed
+40_00ec
+41_00eb
+42_00eb
+43_00ea
+44_00ea
+45_00e9
+46_00e8
+47_00e8
+48_00e7
+49_00e6
+4a_00e6
+4b_00e5
+4c_00e4
+4d_00e3
+4e_00e3
+4f_00e2
+50_00e1
+51_00e1
+52_00e0
+53_00df
+54_00de
+55_00dd
+56_00dd
+57_00dc
+58_00db
+59_00da
+5a_00d9
+5b_00d9
+5c_00d8
+5d_00d7
+5e_00d6
+5f_00d5
+60_00d4
+61_00d3
+62_00d3
+63_00d2
+64_00d1
+65_00d0
+66_00cf
+67_00ce
+68_00cd
+69_00cc
+6a_00cb
+6b_00ca
+6c_00c9
+6d_00c8
+6e_00c7
+6f_00c6
+70_00c5
+71_00c4
+72_00c3
+73_00c2
+74_00c1
+75_00c0
+76_00bf
+77_00be
+78_00bd
+79_00bc
+7a_00bb
+7b_00ba
+7c_00b9
+7d_00b8
+7e_00b7
+7f_00b6

scripts/ascii_hex_writer_examples/linear128.hex

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+// ascii hex file for linear function
+
+00_0000
+01_0001
+02_0002
+03_0003
+04_0004
+05_0005
+06_0006
+07_0007
+08_0008
+09_0009
+0a_000a
+0b_000b
+0c_000c
+0d_000d
+0e_000e
+0f_000f
+10_0010
+11_0011
+12_0012
+13_0013
+14_0014
+15_0015
+16_0016
+17_0017
+18_0018
+19_0019
+1a_001a
+1b_001b
+1c_001c
+1d_001d
+1e_001e
+1f_001f
+20_0020
+21_0021
+22_0022
+23_0023
+24_0024
+25_0025
+26_0026
+27_0027
+28_0028
+29_0029
+2a_002a
+2b_002b
+2c_002c
+2d_002d
+2e_002e
+2f_002f
+30_0030
+31_0031
+32_0032
+33_0033
+34_0034
+35_0035
+36_0036
+37_0037
+38_0038
+39_0039
+3a_003a
+3b_003b
+3c_003c
+3d_003d
+3e_003e
+3f_003f
+40_0040
+41_0041
+42_0042
+43_0043
+44_0044
+45_0045
+46_0046
+47_0047
+48_0048
+49_0049
+4a_004a
+4b_004b
+4c_004c
+4d_004d
+4e_004e
+4f_004f
+50_0050
+51_0051
+52_0052
+53_0053
+54_0054
+55_0055
+56_0056
+57_0057
+58_0058
+59_0059
+5a_005a
+5b_005b
+5c_005c
+5d_005d
+5e_005e
+5f_005f
+60_0060
+61_0061
+62_0062
+63_0063
+64_0064
+65_0065
+66_0066
+67_0067
+68_0068
+69_0069
+6a_006a
+6b_006b
+6c_006c
+6d_006d
+6e_006e
+6f_006f
+70_0070
+71_0071
+72_0072
+73_0073
+74_0074
+75_0075
+76_0076
+77_0077
+78_0078
+79_0079
+7a_007a
+7b_007b
+7c_007c
+7d_007d
+7e_007e
+7f_007f