2021-07-02 22:19:04 +02:00
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#ifndef __RX_H
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#define __RX_H
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#include <stdint.h>
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#include <arm_math.h>
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2022-01-01 02:10:06 +01:00
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// RX ADC
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#define RX_ADC_CLOCK (700000L) // (168000000/((47,5+12,5)*4)
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#define RX_ADC_OVERSAMPLING (2)
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#define RX_ADC_SAMPLE_RATE (RX_ADC_CLOCK/RX_ADC_OVERSAMPLING)
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#define RX_ADC_BUFFER_SIZE (1024)
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#define RX_ADC_SAMPLES_BUFFER_RATE (RX_ADC_SAMPLE_RATE/RX_ADC_BUFFER_SIZE)
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2022-01-03 17:52:27 +01:00
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// RX DAC
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#define RX_DAC_DIVISOR 7680
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#define RX_DAC_SAMPLE_RATE (CLOCK/RX_DAC_DIVISOR) // 21875
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2021-07-02 22:19:04 +02:00
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// 1° stadio
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// decimazione del singolo stadio
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#define MS_HBF_TAP_NUM (15)
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#define MS_DECIMATION_FACTOR (2)
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#define MS_DECIMATION_FACTOR_MASK (MS_DECIMATION_FACTOR - 1)
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// ringbuf
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#define MIXED_SAMPLES_RINGBUFFER_SIZE (64) // l'ultimo deve essere grande almeno come MS_HBF_TAP_NUM
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#define MIXED_SAMPLES_RINGBUFFER_SIZE_MASK (MIXED_SAMPLES_RINGBUFFER_SIZE - 1)
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#define MIXED_SAMPLES_2M_RINGBUFFER_SIZE (MIXED_SAMPLES_RINGBUFFER_SIZE / 2)
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#define MIXED_SAMPLES_2M_RINGBUFFER_SIZE_MASK (MIXED_SAMPLES_2M_RINGBUFFER_SIZE - 1)
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2022-01-01 02:10:06 +01:00
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#define ST1_OUT_SAMPLE_RATE (RX_ADC_SAMPLE_RATE/(MS_DECIMATION_FACTOR*2))
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2021-07-02 22:19:04 +02:00
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// 2° stadio
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#define ST2_BUFFER_SIZE (256)
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#define ST2_DECIMATION_FACTOR (4)
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#define ST2_OUT_SAMPLE_RATE (ST1_OUT_SAMPLE_RATE/ST2_DECIMATION_FACTOR)
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#define ST2_FILTER_BLOCK_SIZE (ST2_BUFFER_SIZE)
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#define ST2_FILTER_TAP_NUM (128)
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2022-02-06 17:40:36 +01:00
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#define RX_DAC_BUFFER_SIZE (ST2_BUFFER_SIZE/ST2_DECIMATION_FACTOR)
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2021-12-31 04:22:22 +01:00
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2021-07-02 22:19:04 +02:00
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// audio filter
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2022-01-03 17:52:27 +01:00
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#define RX_AUDIO_FILTER_TAP_NUM 128
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#define RX_AUDIO_FILTER_FREQ_DEF (1250)
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#define RX_AUDIO_FILTER_FREQ_MAX (RX_DAC_SAMPLE_RATE/2)
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#define RX_AUDIO_FILTER_BW_DEF (2000)
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#define RX_AUDIO_FILTER_BW_MAX (RX_DAC_SAMPLE_RATE/2)
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#define RX_AUDIO_FILTER_BETA_DEF (16)
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2022-02-06 17:40:36 +01:00
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#define RX_AUDIO_FILTER_BLOCK_SIZE RX_DAC_BUFFER_SIZE
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2022-01-03 17:52:27 +01:00
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// demodulatore
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2022-02-06 17:40:36 +01:00
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#define RX_NCO_FREQUENCY (RX_DAC_SAMPLE_RATE/((0xFFFFFFFF)/NCO2_INCREMENT)) // 1750
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2021-07-02 22:19:04 +02:00
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2021-12-31 04:22:22 +01:00
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#define RX_SMETER_SCALE 4
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extern uint8_t rx_signal, rx_signal_last;
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extern q31_t rx_nco1_increment;
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2021-07-02 22:19:04 +02:00
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2022-02-06 17:40:36 +01:00
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// RX ADC
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extern volatile uint8_t rx_adc_buffer_ready;
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extern uint16_t rx_adc_buffer[RX_ADC_BUFFER_SIZE];
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// RX DAC
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extern volatile uint8_t rx_dac_buffer_toggle, rx_dac_buffer_mezzo_vuoto;
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extern q31_t prefilter_rx_dac_buffer[RX_DAC_BUFFER_SIZE];
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extern q31_t rx_dac_buffer[2][RX_DAC_BUFFER_SIZE];
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2021-07-02 22:19:04 +02:00
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// filtro st2
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extern arm_fir_decimate_instance_q31 st2_filter_I_struct;
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extern arm_fir_decimate_instance_q31 st2_filter_Q_struct;
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extern q31_t st2_filter_I_state[ST2_FILTER_BLOCK_SIZE + ST2_FILTER_TAP_NUM - 1];
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extern q31_t st2_filter_Q_state[ST2_FILTER_BLOCK_SIZE + ST2_FILTER_TAP_NUM - 1];
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extern int32_t st2_filter_taps[ST2_FILTER_TAP_NUM];
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extern int32_t st2_wide_taps[ST2_FILTER_TAP_NUM];
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// filtro audio
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extern arm_fir_instance_q31 audio_filter_struct;
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2022-01-03 17:52:27 +01:00
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extern q31_t audio_filter_state[RX_AUDIO_FILTER_BLOCK_SIZE + RX_AUDIO_FILTER_TAP_NUM - 1];
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extern int32_t audio_filter_coeffs[RX_AUDIO_FILTER_TAP_NUM];
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2021-07-02 22:19:04 +02:00
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// mix
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void rx_mixer(uint16_t *in, uint16_t size, q31_t *I_out, q31_t *Q_out, int32_t nco_freq);
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// demodulatori
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void ssb_demodulator(q31_t *in_I, q31_t *in_Q, uint16_t size, q31_t *out, q31_t nco_freq);
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void dc_demodulator(q31_t *in, uint16_t size, q31_t *out);
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void am_demodulator(q31_t *in_I, q31_t *in_Q, uint16_t size, q31_t *out);
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// filtri
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// void filter_init(void);
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2022-01-12 01:09:32 +01:00
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void set_rx_audio_filter(void);
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2021-07-02 22:19:04 +02:00
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void st2_filter_init(void);
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2022-02-07 02:02:36 +01:00
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void rx_inizializza_filtro_audio(void);
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2021-07-02 22:19:04 +02:00
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void audio_filter_generate_coeffs(int32_t *Coeffs, uint32_t freq, uint32_t bw, uint8_t beta);
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q31_t hb_fir15(q31_t * samples_ringbuf, uint8_t sample_index, uint8_t buff_size_mask, q31_t * coefficients);
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#endif
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