kopia lustrzana https://github.com/bristol-seds/pico-tracker
New feature: Added sintables for aprs
Richard Meadows
rodzic
860d339adb
commit
746a1d278e
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@ -154,6 +154,11 @@ TAGFILES = $(SOURCES) $(shell $(CAT) $(OBJECTS:.o=.d) \
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#
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all: $(TARGET).elf etags
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# Rule for generating sintable
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sintable:
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@$(ECHO) 'Generating ax25 lookup table...'
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python tools/ax25_lookup/ax25_lookup.py > inc/ax25_sintable.h
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# Rule for generating object and dependancy files from source files.
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#
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# Creates a directory in the output tree if nessesary. File is only
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@ -0,0 +1,67 @@
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/**
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* Autogenerated sine tables. See tools/ax25_lookup/ax25_lookup.py
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*/
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#ifndef AX25_SINTABLE_H
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#define AX25_SINTABLE_H
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#define AX25_SINTABLE_ORDER 8
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#define AX25_SINTABLE_LENGTH 256
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/**
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* 1st quadrant sin lookup table for 1.6kHz deviation
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*
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* Length: 256
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* Frequency Resolution: 7.805 Hz
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*/
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uint16_t sintable_256_1600hz[] = {
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0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 16, 18,
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19, 20, 21, 23, 24, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36,
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38, 39, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55,
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56, 57, 58, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 73,
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74, 75, 76, 77, 78, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90,
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91, 92, 93, 94, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106,
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108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122,
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123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137,
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138, 139, 140, 140, 141, 142, 143, 144, 145, 146, 147, 148, 148, 149, 150,
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151, 152, 153, 154, 154, 155, 156, 157, 158, 158, 159, 160, 161, 162, 162,
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163, 164, 165, 165, 166, 167, 168, 168, 169, 170, 170, 171, 172, 173, 173,
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174, 175, 175, 176, 176, 177, 178, 178, 179, 180, 180, 181, 181, 182, 183,
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183, 184, 184, 185, 185, 186, 186, 187, 187, 188, 188, 189, 189, 190, 190,
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191, 191, 192, 192, 193, 193, 193, 194, 194, 195, 195, 195, 196, 196, 197,
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197, 197, 198, 198, 198, 199, 199, 199, 199, 200, 200, 200, 201, 201, 201,
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201, 202, 202, 202, 202, 202, 203, 203, 203, 203, 203, 203, 204, 204, 204,
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204, 204, 204, 204, 204, 205, 205, 205, 205, 205, 205, 205, 205, 205, 205,
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205
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};
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/**
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* 1st quadrant sin lookup table for 2.5kHz deviation
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*
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* Length: 256
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* Frequency Resolution: 7.805 Hz
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*/
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uint16_t sintable_256_2500hz[] = {
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0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 27,
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29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57,
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59, 61, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 85,
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87, 89, 91, 93, 95, 97, 99, 100, 102, 104, 106, 108, 110, 112, 113,
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115, 117, 119, 121, 123, 124, 126, 128, 130, 132, 133, 135, 137, 139, 140,
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142, 144, 146, 148, 149, 151, 153, 154, 156, 158, 160, 161, 163, 165, 166,
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168, 170, 171, 173, 175, 176, 178, 180, 181, 183, 184, 186, 188, 189, 191,
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192, 194, 196, 197, 199, 200, 202, 203, 205, 206, 208, 209, 211, 212, 214,
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215, 217, 218, 219, 221, 222, 224, 225, 226, 228, 229, 231, 232, 233, 235,
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236, 237, 239, 240, 241, 243, 244, 245, 246, 248, 249, 250, 251, 253, 254,
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255, 256, 257, 258, 260, 261, 262, 263, 264, 265, 266, 267, 268, 270, 271,
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272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 282, 283, 284, 285,
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286, 287, 288, 289, 290, 290, 291, 292, 293, 294, 294, 295, 296, 297, 297,
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298, 299, 300, 300, 301, 302, 302, 303, 304, 304, 305, 305, 306, 307, 307,
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308, 308, 309, 309, 310, 310, 311, 311, 312, 312, 313, 313, 313, 314, 314,
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315, 315, 315, 316, 316, 316, 317, 317, 317, 317, 318, 318, 318, 318, 319,
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319, 319, 319, 319, 319, 320, 320, 320, 320, 320, 320, 320, 320, 320, 320,
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320
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};
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#endif /* AX25_SINTABLE_H */
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@ -0,0 +1,62 @@
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#!/bin/python
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import numpy as np
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import math
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length = 256
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deviation_f = 2500
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def print_sintable(deviation_f):
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f_resolution = 7.805347443
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deviation = (deviation_f/f_resolution)
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# Generate our sin table
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quadrant_range = np.arange(0, np.pi/2, (np.pi/2)/length)
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sintable = np.multiply(np.sin(quadrant_range), deviation)
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# stringify
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strings = [ "{0:0.0f}".format(x) for x in sintable ]
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maxlen = max([ len(s) for s in strings ])
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# stringify in equal parts
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strings = [ "{0:>{width}.0f}".format(x, width=maxlen) for x in sintable ]
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string = ", ".join(strings)
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# lines
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line_len = int(math.floor(78 / (maxlen+2))*(maxlen+2))
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lines = [string[x:x+line_len].rstrip() for x in range(0, len(string), line_len)]
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string = "\n ".join(lines)
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print "/**"
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print " * 1st quadrant sin lookup table for {0:0.1f}kHz deviation".format(deviation_f/1000.0)
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print " *"
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print " * Length: {0}".format(length)
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print " * Frequency Resolution: {0:0.3f} Hz".format(f_resolution)
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print " */"
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print "uint16_t sintable_{0}_{1}hz[] = {{".format(length, deviation_f)
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print " "+string
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print "};"
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print
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print "/**"
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print " * Autogenerated sine tables. See tools/ax25_lookup/ax25_lookup.py"
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print " */"
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print
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print "#ifndef AX25_SINTABLE_H"
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print "#define AX25_SINTABLE_H"
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print
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print
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print "#define AX25_SINTABLE_ORDER {0:d}".format(int(math.log(length, 2)))
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print "#define AX25_SINTABLE_LENGTH {0:d}".format(length)
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print
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print
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print_sintable(1600)
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print_sintable(2500)
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print "#endif /* AX25_SINTABLE_H */"
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