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Teensy_Convolution_SDR.ino
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Teensy_Convolution_SDR.ino
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/*********************************************************************************************
(c) Frank DD4WH 2020_09_08
"TEENSY CONVOLUTION SDR"
SOFTWARE FOR A FAST CONVOLUTION-BASED RADIO
HARDWARE NEEDED:
- simple quadrature sampling detector board producing baseband IQ signals (Softrock, Elektor SDR etc.)
(IQ boards with up to 256kHz bandwidth supported --> which basically means nearly 100% of the existing boards on the market)
- Teensy audio board or ADC PCM1808 and DAC PCM5102a
- Teensy 3.6 or Teensy 4.0 or Teensy 4.1 (Teensy 3.1/3.2/3.5 not supported)
- has also been successfully used with Msi001 tuner chip (Esteban Bonito & tisho), but not yet incorporated in this sketch
HARDWARE OPTIONAL:
- Preselection: switchable RF lowpass or bandpass filter
- digital step attenuator: PE4306 used in my setup
- I2C adapter chip
SOFTWARE:
- FFT Fast Convolution = Digital Convolutionbuffer_spec_FFT
- with overlap - save = overlap-discard complex bandpass main filtering
- spectral NR uses FFT-iFFT overlap-add with 50% overlap
- in floating point 32bit
- with Teensy 3.6: compile with 180MHz F_CPU, other speeds not supported. Maybe with the newest fix in Teensyduino, higher speeds could work, but this is untested
- with Teensy 4.0: compile with "Optimize: Faster", never use "Optimize: smallest code", the latter will not work!
- with Teensy 4.1: tested in combination with SGTL5000 on D07JBH PCB board with ugly style adaptor board
- tested with Arduino 1.8.12 & Teensyduino 1.52
- the T4 versions of the code also work with toolchain ARM ver. 9
Part of the evolution of this project has been documented here:
https://forum.pjrc.com/threads/40188-Fast-Convolution-filtering-in-floating-point-with-Teensy-3-6/page2
https://forum.pjrc.com/threads/40590-Teensy-Convolution-SDR-(Software-Defined-Radio)/page10
HISTORY OF IMPLEMENTED FEATURES
- 12kHz to 30MHz Receive PLUS 76 - 108MHz: undersampling-by-3 with slightly reduced sensitivity (-9dB)
- I & Q - correction in software (manual correction or automatic correction)
- efficient frequency translation without multiplication
- efficient spectrum display using a 256 point FFT on the first 256 samples of every 4096 sample-cycle
- efficient AM demodulation with ARM functions
- efficient DC elimination after AM demodulation
- implemented nine different AM demodulation algorithms for comparison (only two could stand the test and one algorithm was finally left in the implementation)
- real SAM - synchronous AM demodulation with phase determination by atan2f implemented from the wdsp lib
- Stereo-SAM and sideband-selected SAM
- sample rate from 48k to 234k and decimation-by-8 for efficient realtime calculations
- spectrum Zoom function 1x, 2x, 4x, 512x, 1024x, 2048x, 4096x --> 4096x zoom with sub-Hz resolution
- Automatic gain control (high end algorithm by Warren Pratt, wdsp)
- plays MP3 and M4A (iTunes files) from SD card with the awesome lib by Frank Bösing (his old MP3 lib, not the new one)
- automatic IQ amplitude and phase imbalance correction
- dynamic frequency indicator figures and graticules on spectrum display x-axis
- kind of menu system now working with many variables that can be set by the encoders
- EEPROM save & load of important settings
- wideband FM demodulation with deemphasis
- automatic codec gain adjustment depending on the sample input level
- spectrum display AGC to allow display of very small signals
- spectrum display in WFM activated (alpha version . . .)
- optimized automatic test whether mirror rejection is working - if not, codec is restarted automatically until we have working mirror rejection
- display mirror rejection check ("IQtest" in red box)
- activated integrated codec 5-band graphic equalizer
- added digital attenuator PE4306 bit-banging SPI control [0 -31dB attenuation possible]
- added backlight control for TFT in the menu
- added analog gain display (analog codec gain AND attenuation displayed)
- fixed major bug associated with too small "string" variables for printing, leading to annoying audio clicks
- STEREO FM reception implemented and disabled spectrum display in WFM STEREO mode, because the digital noise of the refresh of the spectrum display does seriously distort audio
- manual notch filter implemented [in the frequency domain: simply deletes bins before the iFFT]
- bandwidth adjustment of manual notch filter implemented
- graphical display of manual notch filters in the frequency domain
- Michaels excellent noise blanker is working! Eliminates noise impulses very nicely and effectively!
- leaky LMS algorithm from the wdsp lib implemented (but not working as expected . . .)
- switched to complex filter coefficients for general filter in the fast convolution process
- freely adjustable bandpasses & passband tuning in AM/SAM/SSB . . .
- rebuilt convolution with more flexible choice of FFT size --> now default FFT size is 512, because of memory constraints when using 1024 . . .
- decimation and interpolation filters are calculated with new algorithm and are calculated on-the-fly when changing filter characteristics --> much less hiss and ringing of the filters
- Blackman-Harris four-term window for main FIR filter (as in PowerSDR)
- first test of a 110kHz lowpass filter in the WFM path for FM (stereo) reception on VHF --> does work properly but causes strange effects (button swaps) because of memory constraints when assigning the FIR instances
- changed default to 512tap FFT in order to have enough memory for MP3 playing and other things
- updated Arduino to version 1.8.5 and Teensyduino to version 1.40 and had to change some of the code
- implemented spectral noise reduction in the frequency domain by implementing another FFT-iFFT-overlap-add chain on the real audio output after the main filter
- spectral weighting algorithm Kim et al. 2002 implemented[working!]
- spectral weighting algorithm Romanin et al. 2009 / Schmitt et al. 2002 implemented (minimum statistics)[obsolete]
- spectral weighting algorithm Romanin et al. 2009 implemented (voice activity detector)[working, without VAD now]
- fixed bug in alias filter switching when changing bandpass filter coefficients
- adjustment in finer filter frequency steps when below 500Hz (switch to 50Hz steps instead of 100Hz)
- fixed several bugs in band switching and mode switching
- final tweak of spectral NR algorithms finished (many parameters eliminated from menu)
- for comparison added LMS and leaky LMS to NR menu choice (four NR algorithms to choose from: Kim, Romanin, leaky LMS, LMS)
- changed spectral NR Romanin to newest version by Michael DL2FW [the final UHSDR version, 22.2.2018]
- analog clock design
- spectrum display FFT windowing bug fixed (thanks, Bob Larkin!)
- ZoomFFT repaired and now fully functional for all magnifications (up to 2048x), additional IIR filters added, also added higher refresh rate!
- incorporated many good ideas by Bob Larkin, thanks!
- experimental new sample rates up to 353ksps . . . https://forum.pjrc.com/threads/42336-Reset-audio-board-codec-SGTL5000-in-realtime-processing/page3?highlight=sample+rate
- add possibility to use PCB hardware by DO7JBH https://github.com/do7jbh/SSR-2
- bugfix array out-of-bound, thanks bicycleguy for pointing me to this bug!
- atan2f approximation: https://www.mikrocontroller.net/topic/atan2-funktion-mit-lookup-table-fuer-arm --> thanks Frank B for the hint !
- bugfix band vs. bands --> cleanup and changed int band to int current_band
- integrated automatic crc check on eePROM load and save (by Mike / bicycleguy, thanks!) - no more need to uncomment/comment during first time use of the software
- added support for Bob Larkins RF Octave frontend filters http://www.janbob.com/electron/FilterBP1/FiltBP1.html
- bugfix: only use local loop variables
- bugfix: software now usable on different hardware versions: DO7JBH, DD4WH
- CW decoder (modified version of Lofturs excellent implementation) taken from UHSDR
- RTTY decoder: taken from UHSDR
- alternative RTTY decoder (Martin Ossmann)
- ERF time signal decoder (Martin Ossmann) with automatic adjustment of the real time clock
- now runs on Teensy 4.0
- bugfix runover audio buffers
- EEPROM runs fine on T4
- flexible T4 CPU frequency setting in menu, < 1 Watt power consumption is thus possible in every mode ! :-) [3.2" TFT + ADC + DAC + Teensy 4.1 + QSD hardware < 1 Watt !]
- T4: CPU temperature display
- T4: Hifi Stereo with PLL
- fixed RTC for T4
- T4 filter steepness doubled: now uses 1024-point-FFT, T3.6 uses 512-point-FFT
- T4: experimental: 2048-point-FFT --> filter after decimation equivalent to 16384 taps, only possible with modification of record_queue.h and record_queue.cpp --> substitute 53 with 83 blocks
- T4: tweak PLL clocks/switch off ADCs etc. to lower EMI in T4 (thanks FrankB !)
- float/double optimizations (FrankB)
- bugfix PLL for WFM Stereo (thanks, FrankB for pointing me to that!)
- automatic STEREO detection in WFM
- new debouncing of encoder (new lib by FrankB)
- audio volume encoder logarithmic feel (thanks to FrankB)
- bugfix Auto-IQ correction Moseley & Slump (2006) (thanks to FrankB)
- introduce ENCODER_FACTOR in order to be flexible with encoder library (DD4WH T4 setup does only work with the standard encoder lib and hardware debouncing with 4n7 caps at the encoder contacts)
- change ILI9341 screen update --> credit to FrankB [frees up CPU load considerably !]
- added hardware support for DO7JBH hardware with T3.6-to-T4.1. adapter
- added more convinient tuning steps, thanks tisho!
- menu assistant by tisho makes menu buttons obsolete and makes menu navigation MUCH easier ! Thanks tisho!
- Zoom FFT now correctly implemented for every zoom step up to 2048x --> now exclusively uses CMSIS decimation function and no more IIR filters, (formerly magnifications > 256x were spoiled, sample rate was fixed and not correctly taken into account for the lowpass filters)
- bugfix !? NoAudioInterrupts() - AudioInterrupts() should not be used with T4.x --> causes problems because of the spread spectrum adjustments !???
- experimental implementation of 9-band audio equalizer [Bob Larkins design]: variables line 1928, setup: line 3655
TODO:
- implement Bob Larkins´ FIR equalizer (https://forum.pjrc.com/threads/60928-Audio-Equalizer-using-FIR?highlight=equalizer) for every hardware and eliminate the SGTL5000 hardware-based equalizer (the latter does not work as it should, at least for the 5-band version)
- RDS decoding in wide FM reception mode ;-): very hard, but could be barely possible
- account for using the Si5351 with two clock outputs in 90 degrees difference
- fix bug in Zoom_FFT --> lowpass IIR filters run with different sample rates, but are calculated for a fixed sample rate of 48ksps
- implement separate interrupt to cope with UI (encoders, buttons, calculation of filter coefficients) in order to free audio interrupt
- SSB autotune algorithm taken from Robert Dick
- BPSK decoder
- UKW DX filters for WFM prior to FM demodulation (110kHz, 80kHz, 57kHz)
- test dBm measurement according to filter passband
- finetune AGC parameters and make AGC HANG TIME, AGC HANG THRESHOLD and AGC HANG DECAY user-adjustable
- record and playback IQ audio stream ;-)
- read stations´ frequencies from SD card and display station names when tuned to a frequency
- implement Motorola C-QUAM AM Stereo demodulation
- CW peak filter (independently adjustable from notch filter)
some parts of the code modified from and/or inspired by the following open sources:
Teensy SDR (rheslip & DD4WH): https://github.com/DD4WH/Teensy-SDR-Rx [GNU GPL]
UHSDR (M0NKA, KA7OEI, DF8OE, DB4PLE, DL2FW, DD4WH & other contributors): https://github.com/df8oe/UHSDR [GNU GPL]
libcsdr (András Retzler): https://github.com/simonyiszk/csdr [BSD / GPL]
wdsp (Warren Pratt): http://svn.tapr.org/repos_sdr_hpsdr/trunk/W5WC/PowerSDR_HPSDR_mRX_PS/Source/wdsp/ [GNU GPL]
Wheatley (2011): cuteSDR https://github.com/satrian/cutesdr-se [BSD]
Robert Dick (1999): Tune SSB Automatically. in QEX: http://www.arrl.org/files/file/QEX%20Binaries/1999/ssbtune.zip ["code is in the public domain . . .", thus I assume GNU GPL]
Martin Ossmann (2019): unpublished source code for decoders for RTTY and ERF time signals, thank you, Martin, for the permission to include your code here!
A great thank you and lots of credit go to Frank Bösing: from sample-rate-change-on-the-fly code to many many code snippets !
GREAT THANKS FOR ALL THE HELP AND INPUT BY WALTER, WMXZ !
Audio queue optimized by Pete El Supremo 2016_10_27, thanks Pete!
An important hint on the implementation came from Alberto I2PHD, thanks for that!
Thanks to Brian, bmillier for helping with codec restart code for the SGTL 5000 codec in the Teensy audio board!
Thanks a lot to Michael DL2FW - without you the spectral noise reduction would not have been possible! Also you contributed the state-of-the-art Noise Blanker
Bob Larkin, W7PUA, found a significant bug in the spectrum display FFT windowing and added lots of other very useful things, thanks a lot, Bob!
and of course a great Thank You to Paul Stoffregen @ pjrc.com for providing the Teensy platform and its excellent audio library !
Audio processing in float32_t with the NEW ARM CMSIS lib, --> https://forum.pjrc.com/threads/40590-Teensy-Convolution-SDR-(Software-Defined-Radio)?p=129081&viewfull=1#post129081
*********************************************************************************
**
** Project.........: Read Hand Sent Morse Code (tolerant of considerable jitter)
**
** Copyright (c) 2016 Loftur E. Jonasson (tf3lj [at] arrl [dot] net)
**
** https://sites.google.com/site/lofturj/cwreceive#TOC-Take-two-Fast-Fourier-Transform-and-Colour-Graphics
** Substantive portions of the methodology used here to decode Morse Code are found in:
**
** "MACHINE RECOGNITION OF HAND-SENT MORSE CODE USING THE PDP-12 COMPUTER"
** by Joel Arthur Guenther, Air Force Institute of Technology,
** Wright-Patterson Air Force Base, Ohio
** December 1973
** http://www.dtic.mil/dtic/tr/fulltext/u2/786492.pdf
**
** Platform........: Teensy 3.1 / 3.2 and the Teensy Audio Shield
**
** Initial version.: 0.00, 2016-01-25 Loftur Jonasson, TF3LJ / VE2LJX
**
*********************************************************************************
GNU GPL LICENSE v3
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
************************************************************************************************************************************/
/* If you use the hardware made by Frank DD4WH uncomment the next line */
//#define HARDWARE_DD4WH
/* If you use the hardware made by Frank DD4WH & the T4 uncomment the next line */
//#define HARDWARE_DD4WH_T4
/* If you use the hardware made by Frank DD4WH & the T4 uncomment the next line */
//#define HARDWARE_AD8331
/* If you use the hardware made by FrankB uncomment the next line */
//#define HARDWARE_FRANKB
//#define HARDWARE_FRANKB2
/* If you use the hardware made by Dante DO7JBH [https://github.com/do7jbh/SSR-2], uncomment the next line */
//#define HARDWARE_DO7JBH
/* If you use the hardware made by Dante DO7JBH with a Teensy 4.1 adapter [https://github.com/do7jbh/SSR-2], uncomment the next line */
#define HARDWARE_DO7JBH_T41
/* only for debugging */
//#define DEBUG
/* this prints out the ADC and DAC levels when NOT in SAM mode, primarily for debugging hardware
recommendation: leave this commented */
//#define USE_ADC_DAC_display
/* only for support of the hardware RF frontend filters designed by Bob Larkin, W7PUA
http://www.janbob.com/electron/FilterBP1/FiltBP1.html
adjust cutoff frequencies according to your needs in function setfreq */
#define USE_BOBS_FILTER
/* flag to indicate to use the changes introduced by Bob Larkin, W7PUA
recommendation: leave this uncommented */
#define USE_W7PUA
/* use faster log calculations
recommendation: leave this uncommented */
#define USE_LOG10FAST
/* use faster atan2f calculation
recommendation: leave this uncommented */
#define USE_ATAN2FAST
#define MP3
#if defined(__IMXRT1062__)
#define T4
#endif
// this allows simultaneous calculation of sin and cos to save processor time for SAM demodulation
extern "C"
{
void sincosf(float err, float *s, float *c);
void sincos(double err, double *s, double *c);
}
#if (defined(T4))
extern "C"
uint32_t set_arm_clock(uint32_t frequency);
// lowering this from 600MHz to 200MHz makes power consumption @5 Volts about 40mA less -> 200mWatts less
// should we make this available in the menu to adjust during runtime? --> DONE
//uint32_t T4_CPU_FREQUENCY = 444000000;
uint32_t T4_CPU_FREQUENCY = 512000000;
#endif
#include <Audio.h>
//#include <Time.h>
#include <TimeLib.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <Metro.h>
#include <Bounce.h>
#include <arm_math.h>
#include <arm_const_structs.h>
#include <si5351.h>
//#include <Encoder.h> // try empirically which lib works best for your encoders !
#include <EncoderBounce.h> // https://github.com/FrankBoesing/EncoderBounce, does not work with my cheap chinese encoders ... but works perfectly with Alps encoders (which cost 10 times more) DD4WH
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(T4)
#include <ILI9341_t3n.h>
#include <ili9341_t3n_font_Arial.h>
#else
#include <ILI9341_t3.h>
#include "font_Arial.h"
#endif
#if defined(MP3)
#include <play_sd_mp3.h> //mp3 decoder by Frank B
#include <play_sd_aac.h> // AAC decoder by Frank B
#define SDCARD_CS_PIN BUILTIN_SDCARD
#if defined(HARDWARE_DD4WH_T4)
#define SDCARD_MOSI_PIN 11 // not actually used
#define SDCARD_SCK_PIN 13 // not actually used
#else
#endif
#endif
#include <util/crc16.h> //mdrhere
#if defined(T4)
#include <utility/imxrt_hw.h> // for setting I2S freq, Thanks, FrankB!
#include <EEPROM.h>
#define WFM_SAMPLE_RATE 256000.0f
//#define WFM_SAMPLE_RATE 234375.0f
#else
#include <EEPROM.h>
#define F_I2S ((((I2S0_MCR >> 24) & 0x03) == 3) ? F_PLL : F_CPU)
#define WFM_SAMPLE_RATE 234375.0f
#endif
// temperature stuff
#if defined(T4)
extern "C" uint8_t external_psram_size __attribute__((weak));
#define TEMPMON_ROOMTEMP 25.0f
static uint32_t s_hotTemp; /*!< The value of TEMPMON_TEMPSENSE0[TEMP_VALUE] at room temperature .*/
static uint32_t s_hotCount; /*!< The value of TEMPMON_TEMPSENSE0[TEMP_VALUE] at the hot temperature.*/
static uint32_t roomCount; /*!< The value of TEMPMON_TEMPSENSE0[TEMP_VALUE] at the hot temperature.*/
static float s_hotT_ROOM; /*!< The value of s_hotTemp minus room temperature(25¡æ).*/
static uint32_t s_roomC_hotC; /*!< The value of s_roomCount minus s_hotCount.*/
#define TMS0_POWER_DOWN_MASK (0x1U)
#define TMS0_POWER_DOWN_SHIFT (0U)
#define TMS1_MEASURE_FREQ(x) (((uint32_t)(((uint32_t)(x)) << 0U)) & 0xFFFFU)
#define TMS0_ALARM_VALUE(x) (((uint32_t)(((uint32_t)(x)) << 20U)) & 0xFFF00000U)
#define TMS02_LOW_ALARM_VALUE(x) (((uint32_t)(((uint32_t)(x)) << 0U)) & 0xFFFU)
#define TMS02_PANIC_ALARM_VALUE(x) (((uint32_t)(((uint32_t)(x)) << 16U)) & 0xFFF0000U)
uint16_t temp_check_frequency; /*!< The temperature measure frequency.*/
uint32_t highAlarmTemp; /*!< The high alarm temperature.*/
uint32_t panicAlarmTemp; /*!< The panic alarm temperature.*/
uint32_t lowAlarmTemp; /*!< The low alarm */
float CPU_temperature = 0.0;
#endif
// CW DECODER STUFF
#define CW_DECODER_BLOCKSIZE_MIN 8
#define CW_DECODER_BLOCKSIZE_MAX 256
#define CW_DECODER_BLOCKSIZE_DEFAULT 128 //88
//#define CW_DECODER_THRESH_MIN 1000
//#define CW_DECODER_THRESH_MAX 50000
//#define CW_DECODER_THRESH_DEFAULT 32000
//#define SIGNAL_TAU 0.01
#define SIGNAL_TAU 0.1
#define ONEM_SIGNAL_TAU (1.0 - SIGNAL_TAU)
#define CW_TIMEOUT 3 // Time, in seconds, to trigger display of last Character received
#define ONE_SECOND (12000 / cw_decoder_config.blocksize) // sample rate / decimation rate / block size
#define CW_SPIKECANCEL_MAX_DURATION 8 // Cancel transients/spikes/drops that have max duration of number chosen.
// Typically 4 or 8 to select at time periods of 4 or 8 times 2.9ms.
// 0 to deselect.
#define CW_SIG_BUFSIZE 256 // Size of a circular buffer of decoded input levels and durations
#define CW_DATA_BUFSIZE 40 // Size of a buffer of accumulated dot/dash information. Max is DATA_BUFSIZE-2
// Needs to be significantly longer than longest symbol 'sos'= ~30.
#define DIGIMODE_OFF 0
#define CW 1
#define RTTY 2
#define EFR 3
#define RTTY_OSSI 4
#define DCF77 5
#define PSK 6
#define DIGIMODE_LAST 5
uint8_t digimode = 0;
float lastII = 0;
float lastQQ = 0;
float RXbit = 0;
float bitSampleTimer=0;
float Tsample=1.0 / 12000.0;
float CP_buffer[256];
float CP_buffer_old = 0.0;
// for EFR
//float bitSamplePeriod=1.0/1000.0 ;
// for RTTY
float bitSamplePeriod=1.0/500.0;
// for DCF77
float dcfRefLevel;
#define withterm 1
// print stuff for text terminal
#define termChrXwidth 9
//#define termChrYwidth 9
#define termChrYwidth 10
//#define termNrows 20
//#define termNrows 16
#define termNrows 4 // 15
#define termNcols 28 // 34
#define CW_x_start spectrum_x + 2 // 1
#define CW_y_start spectrum_y - 1 // 55
//#define font Arial_6
int termCursorXpos = 0;
int termCursorYpos = 0;
uint16_t termColor = 0x10000;
char termCharStore[termNcols][termNrows] ;
int16_t termCharColorStore[termNcols][termNrows] ;
#define RTTYuartFullTime 10
#define RTTYuartHalfTime 6
#define LFcode 10
#define CRcode 13
#define UU 'y'
uint8_t Menu_1_Assistant = 0;
uint8_t Menu_2_Assistant = 0; //Flag for the menu assistant function (by long pressing the encode it is cold the menu with small description)
uint8_t Menu_1_Enc_Sub = 0; //Flag used by the Menu aasistant to show when the sub menu is selected
uint8_t Menu_2_Enc_Sub = 0; //Flag used by the Menu aasistant to show when the sub menu is selected
typedef struct
{
float32_t sampling_freq;
float32_t target_freq;
uint8_t speed;
float32_t thresh;
uint8_t blocksize;
// uint8_t AGC_enable;
uint8_t noisecancel_enable;
uint8_t spikecancel;
#define CW_SPIKECANCEL_MODE_OFF 0
#define CW_SPIKECANCEL_MODE_SPIKE 1
#define CW_SPIKECANCEL_MODE_SHORT 2
bool atc_enable;
bool snap_enable;
bool show_CW_LED; // menu choice whether the user wants the CW LED indicator to be working or not
} cw_config_t;
typedef struct
{
int a;
float32_t b;
float32_t sin;
float32_t cos;
float32_t r;
float32_t buf[3];
} Goertzel;
Goertzel cw_goertzel;
cw_config_t cw_decoder_config =
{ .sampling_freq = 12000.0, .target_freq = 700, //700.0,
.speed = 25,
// .average = 2,
.thresh = 2.8, //32000,
.blocksize = CW_DECODER_BLOCKSIZE_DEFAULT,
// .AGC_enable = 0,
.noisecancel_enable = 1,
.spikecancel = 0,
.atc_enable = false,
.snap_enable = false,
.show_CW_LED = false // menu choice whether the user wants the CW LED indicator to be working or not
};
typedef enum {
RTTY_STOP_1 = 0,
RTTY_STOP_1_5,
RTTY_STOP_2,
RTTY_STOP_NUM
} rtty_stop_t;
typedef struct
{
float32_t speed;
rtty_stop_t stopbits;
uint16_t shift;
float32_t samplerate;
} rtty_mode_config_t;
typedef enum {
RTTY_SPEED_45,
RTTY_SPEED_50,
RTTY_SPEED_200,
RTTY_SPEED_NUM
} rtty_speed_t;
typedef enum {
RTTY_SHIFT_85,
RTTY_SHIFT_170,
RTTY_SHIFT_200,
RTTY_SHIFT_340,
RTTY_SHIFT_425,
RTTY_SHIFT_450,
RTTY_SHIFT_850,
RTTY_SHIFT_NUM
} rtty_shift_t;
typedef struct
{
rtty_speed_t id;
float32_t value;
char* label;
} rtty_speed_item_t;
// TODO: Probably we should define just a few for the various value types and let
// the id be an uint32_t
typedef struct
{
rtty_shift_t id;
uint32_t value;
char* label;
} rtty_shift_item_t;
typedef struct
{
rtty_shift_t shift_idx;
rtty_speed_t speed_idx;
rtty_stop_t stopbits_idx;
bool atc_disable; // should the automatic level control be turned off?
} rtty_ctrl_t;
rtty_ctrl_t rtty_ctrl_config =
{
.shift_idx = RTTY_SHIFT_450,
.speed_idx = RTTY_SPEED_50,
.stopbits_idx = RTTY_STOP_1_5,
.atc_disable = false
};
// bits 0-4 -> baudot, bit 5 1 == LETTER, 0 == NUMBER/FIGURE
const uint8_t Ascii2Baudot[128] =
{
0,
0,
0,
0,
0,
0,
0,
0b001011, // BEL N
0,
0,
0b000010, // \n NL
0,
0,
0b001000, // \r NL
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0b100100, // N
0, // !
0, // "
0, // #
0, // $
0, // %
0, // &
0b000101, // ' N
0b001111, // ( N
0b010010, // ) N
0, // *
0b010001, // + N
0b001100, // , N
0b000011, // - N
0b011100, // . N
0b011101, // / N
0b010110, // 0 N
0b010111, // 1 N
0b010011, // 2 N
0b000001, // 3 N
0b001010, // 4 N
0b010000, // 5 N
0b010101, // 6 N
0b000111, // 7 N
0b000110, // 8 N
0b011000, // 9 N
0b001110, // : N
0, // ;
0, // <
0b011110, // =
0, // >
0b011001, // ? N
0, // @
0b100011, // A L
0b111001, // B L
0b101110, // C L
0b101001, // D L
0b100001, // E L
0b101101, // F L
0b111010, // G L
0b110100, // H L
0b100110, // I L
0b101011, // J L
0b101111, // K L
0b110010, // L L
0b111100, // M L
0b101100, // N L
0b111000, // O L
0b110110, // P L
0b110111, // Q L
0b101010, // R L
0b100101, // S L
0b110000, // T L
0b100111, // U L
0b111110, // V L
0b110011, // W L
0b111101, // X L
0b110101, // Y L
0b110001, // Z L
0,
0,
0,
0,
0,
0,
0b100011, // A L
0b111001, // B L
0b101110, // C L
0b101001, // D L
0b100001, // E L
0b101101, // F L
0b111010, // G L
0b110100, // H L
0b100110, // I L
0b101011, // J L
0b101111, // K L
0b110010, // L L
0b111100, // M L
0b101100, // N L
0b111000, // O L
0b110110, // P L
0b110111, // Q L
0b101010, // R L
0b100101, // S L
0b110000, // T L
0b100111, // U L
0b111110, // V L
0b110011, // W L
0b111101, // X L
0b110101, // Y L
0b110001, // Z L
0,
0,
0,
0,
0,
};
#define RTTY_SYMBOL_CODE (0b11011)
#define RTTY_LETTER_CODE (0b11111)
// RTTY Experiment based on code from the DSP Tutorial at http://dp.nonoo.hu/projects/ham-dsp-tutorial/18-rtty-decoder-using-iir-filters/
// Used with permission from Norbert Varga, HA2NON under GPLv3 license
const rtty_speed_item_t rtty_speeds[RTTY_SPEED_NUM] =
{
{ .id =RTTY_SPEED_45, .value = 45.45, .label = "45" },
{ .id =RTTY_SPEED_50, .value = 50, .label = "50" },
{ .id =RTTY_SPEED_200, .value = 200, .label = "200" },
};
const rtty_shift_item_t rtty_shifts[RTTY_SHIFT_NUM] =
{
{ RTTY_SHIFT_85, 85, " 85" },
{ RTTY_SHIFT_170, 170, "170" },
{ RTTY_SHIFT_200, 200, "200" },
{ RTTY_SHIFT_340, 340, "340" },
{ RTTY_SHIFT_425, 425, "425" },
{ RTTY_SHIFT_450, 450, "450" },
{ RTTY_SHIFT_850, 850, "850" },
};
typedef struct
{
float32_t gain;
float32_t coeffs[4];
uint16_t freq; // center freq
} rtty_bpf_config_t;
typedef struct
{
float32_t gain;
float32_t coeffs[2];
} rtty_lpf_config_t;
typedef struct
{
float32_t xv[5];
float32_t yv[5];
} rtty_bpf_data_t;
typedef struct
{
float32_t xv[3];
float32_t yv[3];
} rtty_lpf_data_t;
static float32_t RttyDecoder_bandPassFreq(float32_t sampleIn, const rtty_bpf_config_t* coeffs, rtty_bpf_data_t* data) {
data->xv[0] = data->xv[1]; data->xv[1] = data->xv[2]; data->xv[2] = data->xv[3]; data->xv[3] = data->xv[4];
data->xv[4] = sampleIn / coeffs->gain; // gain at centre
data->yv[0] = data->yv[1]; data->yv[1] = data->yv[2]; data->yv[2] = data->yv[3]; data->yv[3] = data->yv[4];
data->yv[4] = (data->xv[0] + data->xv[4]) - 2 * data->xv[2]
+ (coeffs->coeffs[0] * data->yv[0]) + (coeffs->coeffs[1] * data->yv[1])
+ (coeffs->coeffs[2] * data->yv[2]) + (coeffs->coeffs[3] * data->yv[3]);
return data->yv[4];
}
static float32_t RttyDecoder_lowPass(float32_t sampleIn, const rtty_lpf_config_t* coeffs, rtty_lpf_data_t* data) {
data->xv[0] = data->xv[1]; data->xv[1] = data->xv[2];
data->xv[2] = sampleIn / coeffs->gain; // gain at DC
data->yv[0] = data->yv[1]; data->yv[1] = data->yv[2];
data->yv[2] = (data->xv[0] + data->xv[2]) + 2 * data->xv[1]
+ (coeffs->coeffs[0] * data->yv[0]) + (coeffs->coeffs[1] * data->yv[1]);
return data->yv[2];
}
typedef enum {
RTTY_RUN_STATE_WAIT_START = 0,
RTTY_RUN_STATE_BIT,
} rtty_run_state_t;
typedef enum {
RTTY_MODE_LETTERS = 0,
RTTY_MODE_SYMBOLS
} rtty_charSetMode_t;
typedef struct {
rtty_bpf_data_t bpfSpaceData;
rtty_bpf_data_t bpfMarkData;
rtty_lpf_data_t lpfData;
rtty_bpf_config_t *bpfSpaceConfig;
rtty_bpf_config_t *bpfMarkConfig;
rtty_lpf_config_t *lpfConfig;
uint16_t oneBitSampleCount;
int32_t DPLLOldVal;
int32_t DPLLBitPhase;
uint8_t byteResult;
uint16_t byteResultp;
rtty_charSetMode_t charSetMode;
rtty_run_state_t state;
const rtty_mode_config_t* config_p;
} rtty_decoder_data_t;
rtty_decoder_data_t rttyDecoderData;
// this is for 12ksps sample rate
// for filter designing, see http://www-users.cs.york.ac.uk/~fisher/mkfilter/
// order 2 Butterworth, freqs: 865-965 Hz, centre: 915 Hz
static rtty_bpf_config_t rtty_bp_12khz_915 =
{
.gain = 1.513364755e+03,
.coeffs = { -0.9286270861, 3.3584472566, -4.9635817596, 3.4851652468 },
.freq = 915
};
// order 2 Butterworth, freqs: 1315-1415 Hz, centre 1365Hz
static rtty_bpf_config_t rtty_bp_12khz_1365 =
{
.gain = 1.513365019e+03,
.coeffs = { -0.9286270861, 2.8583904591, -4.1263569881, 2.9662407442 },
.freq = 1365
};
// order 2 Butterworth, freqs: 1035-1135 Hz, centre: 1085Hz
static rtty_bpf_config_t rtty_bp_12khz_1085 =
{
.gain = 1.513364927e+03,
.coeffs = { -0.9286270861, 3.1900687350, -4.6666321298, 3.3104336142 },
.freq = 1085
};
// order 2 Butterworth, freqs: 1065-1165 Hz, centre: 1115Hz
// for 200Hz shift
static rtty_bpf_config_t rtty_bp_12khz_1115 =
{
.gain = 1.513364944e+03,
.coeffs = { -0.9286270861, 3.1576917276, -4.6112830458, 3.2768349860 },
.freq = 1115
};
// for 340Hz shift --> 915 + 340 = 1255Hz
// order 2 Butterworth, freqs: 1205-1305 Hz, centre: 1255Hz
//
static rtty_bpf_config_t rtty_bp_12khz_1255 =
{
.gain = 1.513364944e+03,
.coeffs = { -0.9286270861, 2.9964316664, -4.3440155011, 3.1094904013 },
.freq = 1255
};
// for 85Hz shift --> 915 + 85Hz = space = 1000Hz
// 3dB bandwidth 50Hz
// order 2 Butterworth, freqs: 975-1025 Hz, centre: 1000Hz
static rtty_bpf_config_t rtty_bp_12khz_1000 =
{
.gain = 5.944465260e+03,
.coeffs = { -0.9636529842, 3.3693752166, -4.9084595657, 3.4323354886 },
.freq = 1000
};
// for 425Hz shift --> 915 + 425Hz = space = 1340Hz
// 3dB bandwidth 100Hz
// order 2 Butterworth, freqs: 1290 - 1390 Hz, centre: 1340Hz
static rtty_bpf_config_t rtty_bp_12khz_1340 =
{
.gain = 1.513365018e+03,
.coeffs = { -0.9286270862, 2.8906128091, -4.1762457780, 2.9996788796 },
.freq = 1340
};
// for 850Hz shift --> 915 + 850Hz = space = 1765Hz
// 3dB bandwidth 100Hz
// order 2 Butterworth, freqs: 1715 - 1815 Hz, centre: 1765Hz
static rtty_bpf_config_t rtty_bp_12khz_1765 =
{
.gain = 1.513365057e+03,
.coeffs = { -0.9286270862, 2.1190223173, -3.1352567157, 2.1989754113 },
.freq = 1765
};
static rtty_lpf_config_t rtty_lp_12khz_50 =
{
.gain = 5.944465310e+03,
.coeffs = { -0.9636529842, 1.9629800894 }
};
static rtty_mode_config_t rtty_mode_current_config;
int RTTY_marker_0 = 915; // RTTY_mark
int RTTY_marker_1 = RTTY_marker_0 + rtty_shifts[rtty_ctrl_config.shift_idx].value;
int is_usb_demod = 1;
float hz_per_pixel = 1.0;
float RTTY_marker_0_offset = 127;
float RTTY_marker_1_offset = 127;
time_t getTeensy3Time()
{
return Teensy3Clock.get();
}
// Settings for the hardware QSD
// Joris PCB uses a 27MHz crystal and CLOCK 2 output
// Elektor SDR PCB uses a 25MHz crystal and the CLOCK 1 output
//#define Si_5351_clock SI5351_CLK1
#if defined(HARDWARE_DO7JBH) || defined(HARDWARE_FRANKB) || defined(HARDWARE_DO7JBH_T41)
#define Si_5351_crystal 25000000
#else
#define Si_5351_crystal 27000000
#endif
#define Si_5351_clock SI5351_CLK2
// {SI5351_DRIVE_2MA, SI5351_DRIVE_4MA, SI5351_DRIVE_6MA, SI5351_DRIVE_8MA};
#define Si_5351_drive SI5351_DRIVE_4MA // default drive strength of the library is 2mA, which could be too low depending on your hardware!?
// Europe uses 9 kHz AM spacing, N.A. uses 10 (AM_SPACING_EU==0). Others??? <PUA>
#define AM_SPACING_EU 1
unsigned long long calibration_factor = 1000000000 ;// 10002285;
long calibration_constant = 0;
// this is for the Joris PCB !
//long calibration_constant = 108000; // this is for the Elektor PCB !
unsigned long long hilfsf = 1000000000;
uint8_t save_energy = 0;
uint8_t atan2_approx = 1;
#if defined (HARDWARE_DO7JBH) || defined (HARDWARE_DO7JBH_T41)
// Optical Encoder connections
Encoder tune (16, 17);
Encoder filter (4, 5);
Encoder encoder3 (1, 2); //(26, 28);
Si5351 si5351;
#define MASTER_CLK_MULT 4 // QSD frontend requires 4x clock
// pins for digital attenuator board PE4306
//#define ATT_LE 24
//#define ATT_DATA 25
//#define ATT_CLOCK 28
// dummy definitions for Dantes hardware
#define ATT_LE 40
#define ATT_DATA 50//41
#define ATT_CLOCK 42
// prop shield LC used for audio speaker amp
//#define AUDIO_AMP_ENABLE 39
#if (defined(T4))
#define BACKLIGHT_PIN 6 // cut PCB trace to 3V3 and new wire soldered from TFT backlight to pin6 on DO7JBHs PCB
#define TFT_DC 34 // 20
#define TFT_CS 10 //21
#define TFT_RST 35 // 255 = unused. connect to 3.3V
#define TFT_MOSI 11 //7
#define TFT_SCLK 13 //14
#define TFT_MISO 12
ILI9341_t3n tft = ILI9341_t3n(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);
#else
#define BACKLIGHT_PIN 0 // unfortunately connected to 3V3 in DO7JBHs PCB
#define TFT_DC 20
#define TFT_CS 21
#define TFT_RST 35 // 255 = unused. connect to 3.3V
#define TFT_MOSI 7
#define TFT_SCLK 14
#define TFT_MISO 12
ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);
#endif
// push-buttons
#if defined (HARDWARE_DO7JBH)
#define BUTTON_1_PIN A22 // encoder2 button = button3SW
#define BUTTON_6_PIN 8 // this is the pushbutton pin of the filter encoder
#elif defined(HARDWARE_DO7JBH_T41)
#define BUTTON_1_PIN 41 // encoder2 button = button3SW
#define BUTTON_6_PIN 15 //8 // this is the pushbutton pin of the filter encoder
#endif
#define BUTTON_2_PIN 37 // BAND+ = button2SW
#define BUTTON_3_PIN 30 // ???
#define BUTTON_4_PIN 36 //
#define BUTTON_5_PIN 38 // this is the pushbutton pin of the tune encoder
#define BUTTON_7_PIN 39 // this is the menu button pin
#define BUTTON_8_PIN 33 //27 // this is the pushbutton pin of encoder 3
const int8_t On_set = 25; // hold switched on
Bounce button1 = Bounce(BUTTON_1_PIN, 50);
Bounce button2 = Bounce(BUTTON_2_PIN, 50);
Bounce button3 = Bounce(BUTTON_3_PIN, 50);
Bounce button4 = Bounce(BUTTON_4_PIN, 50);
Bounce button5 = Bounce(BUTTON_5_PIN, 50);
Bounce button6 = Bounce(BUTTON_6_PIN, 50);
Bounce button7 = Bounce(BUTTON_7_PIN, 50);
Bounce button8 = Bounce(BUTTON_8_PIN, 50);
#elif defined(HARDWARE_FRANKB)
Si5351 si5351;
// Optical Encoder connections
Encoder tune (2, 3);
Encoder filter (1, 2);
Encoder encoder3 (15, 16); //(26, 28);
#define MASTER_CLK_MULT 4 // QSD frontend requires 4x clock
#define PCF8574_ADR 0x20
#define PCF8574_INT 22
#define SDCARD_CS_PIN BUILTIN_SDCARD
#define SDCARD_SENSE 24 //read 0: Card inserted, 1: no Card
#define ENCODER_1_A 2
#define ENCODER_1_B 3
#define ENCODER_2_A 4
#define ENCODER_2_B 14
#define ENCODER_3_A 15
#define ENCODER_3_B 16
#define TFT_DC 10 // only CS pin
#define TFT_CS 9 // using standard pin
#define TFT_RST 255 // no reset
#define TFT_TOUCH_IRQ 5
#define TFT_TOUCH_CS 6
#define LED_PIN 13
ILI9341_t3n tft = ILI9341_t3n(TFT_CS, TFT_DC, TFT_RST);
#elif defined(HARDWARE_FRANKB2)
#undef Si_5351_crystal
#undef Si_5351_clock
#define Si_5351_crystal 25000000
#define Si_5351_clock SI5351_CLK1
Si5351 si5351;
#define MASTER_CLK_MULT 4 // QSD frontend requires 4x clock
#define BACKLIGHT_PIN 6
#define TFT_DC 9
#define TFT_CS 10
#define TFT_RST 255 // 255 = unused. connect to 3.3V
#define TFT_MOSI 11
#define TFT_SCLK 13
#define TFT_MISO 12
ILI9341_t3n tft = ILI9341_t3n(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);
Encoder tune (16, 17);
Encoder filter (15, 14);