46 lines
909 B
Python
46 lines
909 B
Python
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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import math
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header = '''/* Generated file */
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#include <stdint.h>
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const int16_t sin_tab[] = {{{0:s}
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}};
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'''
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def generate():
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s = ''
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for n in range(0,256):
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if (n % 16) == 0:
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s += '\n '
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a = float(n) * math.pi / 128.0
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v = int (round (480.0 * (math.sin (a))));
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s += '{0:+6d},'.format(v)
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return s
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def dtmf():
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f0 = 24000.0
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mf = math.pow (2.0, 32.0) / f0
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dtmf_l = [ 941, 852, 770, 697 ]
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dtmf_h = [1209, 1336, 1477, 1633]
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s = 'const unsigned dtmf_low_tab [] = {'
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for f in dtmf_l:
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n = int (f * mf)
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s += ' 0x{0:08x},'.format (n)
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s += ' };\n'
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s += 'const unsigned dtmf_hi__tab [] = {'
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for f in dtmf_h:
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n = int (f * mf)
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s += ' 0x{0:08x},'.format (n)
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s += ' };\n'
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return s
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if __name__ == '__main__':
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s = generate()
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f = open ('sin.c','w')
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f.write(header.format(s))
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f.write(dtmf())
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f.close()
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