28 lines
927 B
C
28 lines
927 B
C
#ifndef __TX_H
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#define __TX_H
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#include <stdint.h>
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#include <arm_math.h>
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#define TX_AUDIO_FILTER_INTERPOLATION_FACTOR (16)
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#define TX_AUDIO_FILTER_BLOCK_SIZE (1024)
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#define TX_AUDIO_FILTER_TAP_NUM (128)
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// buffer
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extern volatile uint8_t half_tx_dac_buffer_empty, tx_dac_buffer_toggle;
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extern volatile uint8_t tx_adc_buffer_ready;
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// filtro audio
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extern arm_fir_instance_q31 tx_audio_filter_I_struct, tx_audio_filter_Q_struct;
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extern q31_t tx_audio_filter_I_state[TX_AUDIO_FILTER_BLOCK_SIZE + TX_AUDIO_FILTER_TAP_NUM - 1];
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extern q31_t tx_audio_filter_Q_state[TX_AUDIO_FILTER_BLOCK_SIZE + TX_AUDIO_FILTER_TAP_NUM - 1];
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extern int32_t tx_audio_filter_coeffs[TX_AUDIO_FILTER_TAP_NUM];
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// modulatori
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void ssb_modulator(q31_t *in_I, q31_t *in_Q, uint16_t size, q31_t *out, q31_t nco_freq);
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void dc_modulator(q31_t *in, uint16_t size, q31_t *out);
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void am_modulator(q31_t *in_I, q31_t *in_Q, uint16_t size, q31_t *out);
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#endif
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