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magnum88
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UHSDR-active-devel/mchf-eclipse/drivers/audio/softdds/dds_table.c
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
/************************************************************************************
** **
** mcHF QRP Transceiver **
** K Atanassov - M0NKA 2014 **
** **
**---------------------------------------------------------------------------------**
** **
** File name: **
** Description: **
** Last Modified: **
** Licence: GNU GPLv3 **
************************************************************************************/
#include "uhsdr_types.h"
#include "dds_table.h"
// this table represents 2*PI, i.e. a full sine wave
const int16_t DDS_TABLE[DDS_TBL_SIZE] =
{
// 1024 points
0,
201, 402, 603, 804, 1005, 1206, 1406, 1607, 1808, 2009, 2209, 2410, 2610, 2811, 3011,
3211, 3411, 3611, 3811, 4011, 4210, 4409, 4608, 4807, 5006, 5205, 5403, 5601, 5799, 5997, 6195,
6392, 6589, 6786, 6982, 7179, 7375, 7571, 7766, 7961, 8156, 8351, 8545, 8739, 8932, 9126, 9319,
9511, 9703, 9895, 10087, 10278, 10469, 10659, 10849, 11038, 11227, 11416, 11604, 11792, 11980, 12166, 12353,
12539, 12724, 12909, 13094, 13278, 13462, 13645, 13827, 14009, 14191, 14372, 14552, 14732, 14911, 15090, 15268,
15446, 15623, 15799, 15975, 16150, 16325, 16499, 16672, 16845, 17017, 17189, 17360, 17530, 17699, 17868, 18036,
18204, 18371, 18537, 18702, 18867, 19031, 19194, 19357, 19519, 19680, 19840, 20000, 20159, 20317, 20474, 20631,
20787, 20942, 21096, 21249, 21402, 21554, 21705, 21855, 22004, 22153, 22301, 22448, 22594, 22739, 22883, 23027,
23169, 23311, 23452, 23592, 23731, 23869, 24006, 24143, 24278, 24413, 24546, 24679, 24811, 24942, 25072, 25201,
25329, 25456, 25582, 25707, 25831, 25954, 26077, 26198, 26318, 26437, 26556, 26673, 26789, 26905, 27019, 27132,
27244, 27355, 27466, 27575, 27683, 27790, 27896, 28001, 28105, 28208, 28309, 28410, 28510, 28608, 28706, 28802,
28897, 28992, 29085, 29177, 29268, 29358, 29446, 29534, 29621, 29706, 29790, 29873, 29955, 30036, 30116, 30195,
30272, 30349, 30424, 30498, 30571, 30643, 30713, 30783, 30851, 30918, 30984, 31049, 31113, 31175, 31236, 31297,
31356, 31413, 31470, 31525, 31580, 31633, 31684, 31735, 31785, 31833, 31880, 31926, 31970, 32014, 32056, 32097,
32137, 32176, 32213, 32249, 32284, 32318, 32350, 32382, 32412, 32441, 32468, 32495, 32520, 32544, 32567, 32588,
32609, 32628, 32646, 32662, 32678, 32692, 32705, 32717, 32727, 32736, 32744, 32751, 32757, 32761, 32764, 32766,
32766, 32766, 32764, 32761, 32757, 32751, 32744, 32736, 32727, 32717, 32705, 32692, 32678, 32662, 32646, 32628,
32609, 32588, 32567, 32544, 32520, 32495, 32468, 32441, 32412, 32382, 32350, 32318, 32284, 32249, 32213, 32176,
32137, 32097, 32056, 32014, 31970, 31926, 31880, 31833, 31785, 31735, 31684, 31633, 31580, 31525, 31470, 31413,
31356, 31297, 31236, 31175, 31113, 31049, 30984, 30918, 30851, 30783, 30713, 30643, 30571, 30498, 30424, 30349,
30272, 30195, 30116, 30036, 29955, 29873, 29790, 29706, 29621, 29534, 29446, 29358, 29268, 29177, 29085, 28992,
28897, 28802, 28706, 28608, 28510, 28410, 28309, 28208, 28105, 28001, 27896, 27790, 27683, 27575, 27466, 27355,
27244, 27132, 27019, 26905, 26789, 26673, 26556, 26437, 26318, 26198, 26077, 25954, 25831, 25707, 25582, 25456,
25329, 25201, 25072, 24942, 24811, 24679, 24546, 24413, 24278, 24143, 24006, 23869, 23731, 23592, 23452, 23311,
23169, 23027, 22883, 22739, 22594, 22448, 22301, 22153, 22004, 21855, 21705, 21554, 21402, 21249, 21096, 20942,
20787, 20631, 20474, 20317, 20159, 20000, 19840, 19680, 19519, 19357, 19194, 19031, 18867, 18702, 18537, 18371,
18204, 18036, 17868, 17699, 17530, 17360, 17189, 17017, 16845, 16672, 16499, 16325, 16150, 15975, 15799, 15623,
15446, 15268, 15090, 14911, 14732, 14552, 14372, 14191, 14009, 13827, 13645, 13462, 13278, 13094, 12909, 12724,
12539, 12353, 12166, 11980, 11792, 11604, 11416, 11227, 11038, 10849, 10659, 10469, 10278, 10087, 9895, 9703,
9511, 9319, 9126, 8932, 8739, 8545, 8351, 8156, 7961, 7766, 7571, 7375, 7179, 6982, 6786, 6589,
6392, 6195, 5997, 5799, 5601, 5403, 5205, 5006, 4807, 4608, 4409, 4210, 4011, 3811, 3611, 3411,
3211, 3011, 2811, 2610, 2410, 2209, 2009, 1808, 1607, 1406, 1206, 1005, 804, 603, 402, 201,
0,
-201, -402, -603, -804, -1005, -1206, -1406, -1607, -1808, -2009, -2209, -2410, -2610, -2811, -3011,
-3211, -3411, -3611, -3811, -4011, -4210, -4409, -4608, -4807, -5006, -5205, -5403, -5601, -5799, -5997, -6195,
-6392, -6589, -6786, -6982, -7179, -7375, -7571, -7766, -7961, -8156, -8351, -8545, -8739, -8932, -9126, -9319,
-9511, -9703, -9895, -10087, -10278, -10469, -10659, -10849, -11038, -11227, -11416, -11604, -11792, -11980, -12166, -12353,
-12539, -12724, -12909, -13094, -13278, -13462, -13645, -13827, -14009, -14191, -14372, -14552, -14732, -14911, -15090, -15268,
-15446, -15623, -15799, -15975, -16150, -16325, -16499, -16672, -16845, -17017, -17189, -17360, -17530, -17699, -17868, -18036,
-18204, -18371, -18537, -18702, -18867, -19031, -19194, -19357, -19519, -19680, -19840, -20000, -20159, -20317, -20474, -20631,
-20787, -20942, -21096, -21249, -21402, -21554, -21705, -21855, -22004, -22153, -22301, -22448, -22594, -22739, -22883, -23027,
-23169, -23311, -23452, -23592, -23731, -23869, -24006, -24143, -24278, -24413, -24546, -24679, -24811, -24942, -25072, -25201,
-25329, -25456, -25582, -25707, -25831, -25954, -26077, -26198, -26318, -26437, -26556, -26673, -26789, -26905, -27019, -27132,
-27244, -27355, -27466, -27575, -27683, -27790, -27896, -28001, -28105, -28208, -28309, -28410, -28510, -28608, -28706, -28802,
-28897, -28992, -29085, -29177, -29268, -29358, -29446, -29534, -29621, -29706, -29790, -29873, -29955, -30036, -30116, -30195,
-30272, -30349, -30424, -30498, -30571, -30643, -30713, -30783, -30851, -30918, -30984, -31049, -31113, -31175, -31236, -31297,
-31356, -31413, -31470, -31525, -31580, -31633, -31684, -31735, -31785, -31833, -31880, -31926, -31970, -32014, -32056, -32097,
-32137, -32176, -32213, -32249, -32284, -32318, -32350, -32382, -32412, -32441, -32468, -32495, -32520, -32544, -32567, -32588,
-32609, -32628, -32646, -32662, -32678, -32692, -32705, -32717, -32727, -32736, -32744, -32751, -32757, -32761, -32764, -32766,
-32766, -32766, -32764, -32761, -32757, -32751, -32744, -32736, -32727, -32717, -32705, -32692, -32678, -32662, -32646, -32628,
-32609, -32588, -32567, -32544, -32520, -32495, -32468, -32441, -32412, -32382, -32350, -32318, -32284, -32249, -32213, -32176,
-32137, -32097, -32056, -32014, -31970, -31926, -31880, -31833, -31785, -31735, -31684, -31633, -31580, -31525, -31470, -31413,
-31356, -31297, -31236, -31175, -31113, -31049, -30984, -30918, -30851, -30783, -30713, -30643, -30571, -30498, -30424, -30349,
-30272, -30195, -30116, -30036, -29955, -29873, -29790, -29706, -29621, -29534, -29446, -29358, -29268, -29177, -29085, -28992,
-28897, -28802, -28706, -28608, -28510, -28410, -28309, -28208, -28105, -28001, -27896, -27790, -27683, -27575, -27466, -27355,
-27244, -27132, -27019, -26905, -26789, -26673, -26556, -26437, -26318, -26198, -26077, -25954, -25831, -25707, -25582, -25456,
-25329, -25201, -25072, -24942, -24811, -24679, -24546, -24413, -24278, -24143, -24006, -23869, -23731, -23592, -23452, -23311,
-23169, -23027, -22883, -22739, -22594, -22448, -22301, -22153, -22004, -21855, -21705, -21554, -21402, -21249, -21096, -20942,
-20787, -20631, -20474, -20317, -20159, -20000, -19840, -19680, -19519, -19357, -19194, -19031, -18867, -18702, -18537, -18371,
-18204, -18036, -17868, -17699, -17530, -17360, -17189, -17017, -16845, -16672, -16499, -16325, -16150, -15975, -15799, -15623,
-15446, -15268, -15090, -14911, -14732, -14552, -14372, -14191, -14009, -13827, -13645, -13462, -13278, -13094, -12909, -12724,
-12539, -12353, -12166, -11980, -11792, -11604, -11416, -11227, -11038, -10849, -10659, -10469, -10278, -10087, -9895, -9703,
-9511, -9319, -9126, -8932, -8739, -8545, -8351, -8156, -7961, -7766, -7571, -7375, -7179, -6982, -6786, -6589,
-6392, -6195, -5997, -5799, -5601, -5403, -5205, -5006, -4807, -4608, -4409, -4210, -4011, -3811, -3611, -3411,
-3211, -3011, -2811, -2610, -2410, -2209, -2009, -1808, -1607, -1406, -1206, -1005, -804, -603, -402, -201
};
UHSDR-active-devel/mchf-eclipse/drivers/audio/softdds/dds_table.h
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
/************************************************************************************
** **
** mcHF QRP Transceiver **
** K Atanassov - M0NKA 2014 **
** **
**---------------------------------------------------------------------------------**
** **
** File name: **
** Description: **
** Last Modified: **
** Licence: GNU GPLv3 **
************************************************************************************/
#ifndef __DDS_TABLE_H
#define __DDS_TABLE_H
#define DDS_TBL_BITS 10
#define DDS_TBL_SIZE (1 << DDS_TBL_BITS) // 10 = 1024
extern const int16_t DDS_TABLE[DDS_TBL_SIZE];
#endif
UHSDR-active-devel/mchf-eclipse/drivers/audio/softdds/softdds.c
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
/************************************************************************************
** **
** mcHF QRP Transceiver **
** K Atanassov - M0NKA 2014 **
** **
**---------------------------------------------------------------------------------**
** **
** File name: **
** Description: **
** Last Modified: **
** Licence: GNU GPLv3 **
************************************************************************************/
// Credits - SDR cube!!!
// Common
#include "uhsdr_board.h"
#include "dds_table.h"
#include "softdds.h"
// Two Tone Dds
soft_dds_t dbldds[2];
uint32_t softdds_stepForSampleRate(float32_t freq, uint32_t samp_rate)
{
uint64_t freq64_shifted = freq * DDS_TBL_SIZE;
freq64_shifted <<= SOFTDDS_ACC_SHIFT;
uint64_t step = freq64_shifted / samp_rate;
return step;
}
/**
* Initialize softdds for given frequency and sample rate
*/
void softdds_setFreqDDS(soft_dds_t* softdds_p, float32_t freq, uint32_t samp_rate,uint8_t smooth)
{
// Reset accumulator, if need smooth tone
// transition, do not reset it (e.g. wspr)
if(smooth == false)
{
softdds_p->acc = 0;
}
// Calculate new step
softdds_p->step = softdds_stepForSampleRate(freq,samp_rate);
}
/**
* Initialize softdds for given frequency and sample rate
*/
void softdds_configRunIQ(float freq[2],uint32_t samp_rate,uint8_t smooth)
{
softdds_setFreqDDS(&dbldds[0],freq[0],samp_rate,smooth);
softdds_setFreqDDS(&dbldds[1],freq[1],samp_rate,smooth);
}
void softdds_genIQSingleTone(soft_dds_t* dds, float32_t *i_buff,float32_t *q_buff,uint16_t size)
{
for(uint16_t i = 0; i < size; i++)
{
// Calculate next sample
uint32_t k = softdds_nextSampleIndex(dds);
// Load I value (sin)
*i_buff = DDS_TABLE[k];
// -90 degrees shift (cos)
// Load Q value
*q_buff = DDS_TABLE[softdds_phase_shift90(k)];
// Next ptr
i_buff++;
q_buff++;
}
}
/*
* Generates the addition of two sinus frequencies as IQ data stream
* min/max value is +/-2^15-1
* Frequencies need to be configured using softdds_setfreq_dbl
*/
void softdds_genIQTwoTone(soft_dds_t* ddsA, soft_dds_t* ddsB, float *i_buff,float *q_buff,ushort size)
{
for(int i = 0; i < size; i++)
{
uint32_t k[2];
// Calculate next sample
k[0] = softdds_nextSampleIndex(ddsA);
k[1] = softdds_nextSampleIndex(ddsB);
// Load I value 0.5*(sin(a)+sin(b))
*i_buff = ((int32_t)DDS_TABLE[k[0]] + (int32_t)DDS_TABLE[k[1]])/2;
*q_buff = ((int32_t)DDS_TABLE[softdds_phase_shift90(k[0])] + (int32_t)DDS_TABLE[softdds_phase_shift90(k[1])])/2;
// Next ptr
i_buff++;
q_buff++;
}
}
/**
* Overlays an audio stream with a beep signal
* @param dds The previously initialized dds configuration
* @param buffer audio buffer of blockSize (mono/single channel) samples
* @param blockSize
* @param scaling scale the resulting sine wave with this factor
*/
void softdds_addSingleTone(soft_dds_t* dds_ptr, float32_t* buffer, const size_t blockSize, float32_t scaling)
{
for(int i=0; i < blockSize; i++) // transfer to DMA buffer and do conversion to INT
{
buffer[i] += (float32_t)softdds_nextSample(dds_ptr) * scaling; // load indexed sine wave value, adding it to audio, scaling the amplitude and putting it on "b" - speaker (ONLY)
}
}
/**
* Overlays an audio stream with a beep signal
* @param dds The previously initialized dds configuration
* @param buffer1 audio buffer of blockSize (mono/single channel) samples
* @param buffer2 audio buffer of blockSize (mono/single channel) samples
* @param blockSize
* @param scaling scale the resulting sine wave with this factor
*/
void softdds_addSingleToneToTwobuffers(soft_dds_t* dds_ptr, float32_t* buffer1, float32_t* buffer2, const size_t blockSize, float32_t scaling)
{
float32_t Tone;
for(int i=0; i < blockSize; i++) // transfer to DMA buffer and do conversion to INT
{
Tone=(float32_t) softdds_nextSample(dds_ptr) * scaling; // load indexed sine wave value, adding it to audio, scaling the amplitude and putting it on "b" - speaker (ONLY)
buffer1[i] += Tone;
buffer2[i] += Tone;
}
}
/*
* Generates the sinus frequencies as IQ data stream
* min/max value is +/-2^15-1
* Frequency needs to be configured using softdds_setfreq
*/
void softdds_runIQ(float32_t *i_buff,float32_t *q_buff,uint16_t size)
{
if (dbldds[1].step>0.0)
{
softdds_genIQTwoTone(&dbldds[0], &dbldds[1], i_buff, q_buff,size);
}
else
{
softdds_genIQSingleTone(&dbldds[0],i_buff,q_buff,size);
}
}
UHSDR-active-devel/mchf-eclipse/drivers/audio/softdds/softdds.h
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
/************************************************************************************
** **
** mcHF QRP Transceiver **
** K Atanassov - M0NKA 2014 **
** **
**---------------------------------------------------------------------------------**
** **
** File name: **
** Description: **
** Last Modified: **
** Licence: GNU GPLv3 **
************************************************************************************/
#ifndef __SOFTDDS_H
#define __SOFTDDS_H
#include "dds_table.h"
// we use a 32 bit accumulator
#define SOFTDDS_ACC_SHIFT (32-DDS_TBL_BITS)
// Soft DDS public structure
typedef struct
{
// DDS accumulator
uint32_t acc;
// DDS step - not working if part of the structure
uint32_t step;
} soft_dds_t;
/**
* Execute a single step in the sinus generation
*/
inline uint32_t softdds_nextSampleIndex(soft_dds_t* dds)
{
uint32_t retval = (dds->acc >> SOFTDDS_ACC_SHIFT)%DDS_TBL_SIZE;
dds->acc += dds->step;
// now scale down precision and make sure that
// index wraps around properly
return retval;
}
/*
* Get the index which represents a -90 degree shift compared to
* k, i.e. get k = sin(a) => cos(a)
*/
inline uint32_t softdds_phase_shift90(uint32_t k)
{
// make sure that
// index wraps around properly
return (k+(3*DDS_TBL_SIZE/4))%DDS_TBL_SIZE;
}
/**
* Execute a single step in the sinus generation and return actual sample value
*/
inline int16_t softdds_nextSample(soft_dds_t* dds)
{
return DDS_TABLE[softdds_nextSampleIndex(dds)];
}
void softdds_setFreqDDS(soft_dds_t* dds, float32_t freq, uint32_t samp_rate, uint8_t smooth);
void softdds_genIQSingleTone(soft_dds_t* dds, float32_t *i_buff,float32_t *q_buff,uint16_t size);
void softdds_genIQTwoTone(soft_dds_t* ddsA, soft_dds_t* ddsB, float *i_buff,float *q_buff,ushort size);
void softdds_addSingleTone(soft_dds_t* dds_ptr, float32_t* buffer, const size_t blockSize, float32_t scaling);
void softdds_addSingleToneToTwobuffers(soft_dds_t* dds_ptr, float32_t* buffer1, float32_t* buffer2, const size_t blockSize, float32_t scaling);
void softdds_runIQ(float32_t *i_buff, float32_t *q_buff, uint16_t size);
void softdds_configRunIQ(float32_t freq[2],uint32_t samp_rate,uint8_t smooth);
#endif