-/// Array of multiplication factors used to convert frequency to the FTW.
-const uint32_t DDS_MULT[DDS_FREQ_TO_FTW_DIGITS] = { 11, 7, 7, 3, 4, 8, 4, 9, 1 };
-
-/// Array of divisors used to convert frequency to the FTW.
-const uint32_t DDS_DIVISOR[DDS_FREQ_TO_FTW_DIGITS - 1] = { 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 };
-
-/// Lookup table to convert dB amplitude scale in 0.5 steps to a linear DDS scale factor.
-const uint16_t DDS_AMP_TO_SCALE[] =
-{
- 16383, 15467, 14601, 13785, 13013, 12286, 11598, 10949, 10337, 9759, 9213, 8697,
- 8211, 7752, 7318, 6909, 6522, 6157, 5813, 5488, 5181, 4891, 4617, 4359, 4115, 3885, 3668, 3463,
- 3269, 3086, 2913, 2750, 2597, 2451, 2314, 2185, 2062, 1947, 1838, 1735, 1638
-};
-
-
-/// Frequency Word List - 4.0KHz FM frequency deviation at 81.15MHz (445.950MHz)
-const uint32_t freqTable[256] =
-{
- 955418300, 955419456, 955420611, 955421765, 955422916, 955424065, 955425210, 955426351,
- 955427488, 955428618, 955429743, 955430861, 955431971, 955433073, 955434166, 955435249,
- 955436322, 955437385, 955438435, 955439474, 955440500, 955441513, 955442511, 955443495,
- 955444464, 955445417, 955446354, 955447274, 955448176, 955449061, 955449926, 955450773,
- 955451601, 955452408, 955453194, 955453960, 955454704, 955455426, 955456126, 955456803,
- 955457457, 955458088, 955458694, 955459276, 955459833, 955460366, 955460873, 955461354,
- 955461809, 955462238, 955462641, 955463017, 955463366, 955463688, 955463983, 955464250,
- 955464489, 955464701, 955464884, 955465040, 955465167, 955465266, 955465337, 955465380,
- 955465394, 955465380, 955465337, 955465266, 955465167, 955465040, 955464884, 955464701,
- 955464489, 955464250, 955463983, 955463688, 955463366, 955463017, 955462641, 955462238,
- 955461809, 955461354, 955460873, 955460366, 955459833, 955459276, 955458694, 955458088,
- 955457457, 955456803, 955456126, 955455426, 955454704, 955453960, 955453194, 955452408,
- 955451601, 955450773, 955449926, 955449061, 955448176, 955447274, 955446354, 955445417,
- 955444464, 955443495, 955442511, 955441513, 955440500, 955439474, 955438435, 955437385,
- 955436322, 955435249, 955434166, 955433073, 955431971, 955430861, 955429743, 955428618,
- 955427488, 955426351, 955425210, 955424065, 955422916, 955421765, 955420611, 955419456,
- 955418300, 955417144, 955415989, 955414836, 955413684, 955412535, 955411390, 955410249,
- 955409113, 955407982, 955406857, 955405740, 955404629, 955403528, 955402435, 955401351,
- 955400278, 955399216, 955398165, 955397126, 955396100, 955395088, 955394089, 955393105,
- 955392136, 955391183, 955390246, 955389326, 955388424, 955387540, 955386674, 955385827,
- 955385000, 955384192, 955383406, 955382640, 955381896, 955381174, 955380474, 955379797,
- 955379143, 955378513, 955377906, 955377324, 955376767, 955376235, 955375728, 955375246,
- 955374791, 955374362, 955373959, 955373583, 955373234, 955372912, 955372618, 955372350,
- 955372111, 955371900, 955371716, 955371560, 955371433, 955371334, 955371263, 955371220,
- 955371206, 955371220, 955371263, 955371334, 955371433, 955371560, 955371716, 955371900,
- 955372111, 955372350, 955372618, 955372912, 955373234, 955373583, 955373959, 955374362,
- 955374791, 955375246, 955375728, 955376235, 955376767, 955377324, 955377906, 955378513,
- 955379143, 955379797, 955380474, 955381174, 955381896, 955382640, 955383406, 955384192,
- 955385000, 955385827, 955386674, 955387540, 955388424, 955389326, 955390246, 955391183,
- 955392136, 955393105, 955394089, 955395088, 955396100, 955397126, 955398165, 955399216,
- 955400278, 955401351, 955402435, 955403528, 955404629, 955405740, 955406857, 955407982,
- 955409113, 955410249, 955411390, 955412535, 955413684, 955414836, 955415989, 955417144
-};
-
-/**
- * Set DDS frequency tuning word. The output frequency is equal to RefClock * (ftw / 2 ^ 32).
- *
- * @param ftw Frequency Tuning Word
- */
-void ddsSetFTW (uint32_t ftw)
-{
- int x = ftw - freqTable[0];
- putchar (x > 0 ? 0xff : 0x0);
-}
-
-/**
- * Convert frequency in hertz to 32-bit DDS FTW (Frequency Tune Word).
- *
- * @param freq frequency in Hertz
- *
- */
-void ddsSetFreq(uint32_t freq)
-{
- uint8_t i;
- uint32_t ftw;
-
- // To avoid rounding errors with floating point math, we do a long multiply on the data.
- ftw = freq * DDS_MULT[0];
-
- for (i = 0; i < DDS_FREQ_TO_FTW_DIGITS - 1; ++i)
- ftw += (freq * DDS_MULT[i+1]) / DDS_DIVISOR[i];
-
- ddsSetFTW (ftw);
-}
-
-/**
- * Set DDS frequency tuning word for the FSK 0 and 1 values. The output frequency is equal
- * to RefClock * (ftw / 2 ^ 32).
- *
- * @param ftw0 frequency tuning word for the FSK 0 value
- * @param ftw1 frequency tuning word for the FSK 1 value
- */
-void ddsSetFSKFreq (uint32_t ftw0, uint32_t ftw1)
-{
-// printf ("ftw0 %d ftw1 %d\n", ftw0, ftw1);
-}
-
-/**
- * Set the DDS to run in A-FSK, FSK, or PSK31 mode
- *
- * @param mode DDS_MODE_APRS, DDS_MODE_PSK31, or DDS_MODE_HF_APRS constant
- */
-void ddsSetMode (DDS_MODE mode)
-{
-// printf ("mode %d\n", mode);
-}