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617 lines
23 KiB
617 lines
23 KiB
/*
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* input_i2s_f32.cpp
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*
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* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* Extended by Chip Audette, OpenAudio, May 2019
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* Converted to F32 and to variable audio block length
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* The F32 conversion is under the MIT License. Use at your own risk.
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*/
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// Updated OpenAudio F32 with this version from Chip Audette's Tympan Library Jan 2021 RSL
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#include <Arduino.h> //do we really need this? (Chip: 2020-10-31)
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#include "input_i2s_f32.h"
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#include "output_i2s_f32.h"
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#include <arm_math.h>
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//DMAMEM __attribute__((aligned(32)))
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static uint64_t i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; // Two 32-bit transfers per sample.
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audio_block_f32_t * AudioInputI2S_F32::block_left_f32 = NULL;
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audio_block_f32_t * AudioInputI2S_F32::block_right_f32 = NULL;
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uint16_t AudioInputI2S_F32::block_offset = 0;
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bool AudioInputI2S_F32::update_responsibility = false;
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DMAChannel AudioInputI2S_F32::dma(false);
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int AudioInputI2S_F32::flag_out_of_memory = 0;
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unsigned long AudioInputI2S_F32::update_counter = 0;
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float AudioInputI2S_F32::sample_rate_Hz = AUDIO_SAMPLE_RATE;
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int AudioInputI2S_F32::audio_block_samples = AUDIO_BLOCK_SAMPLES;
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//#for 16-bit transfers
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#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S_F32::audio_block_samples*sizeof(i2s_rx_buffer[0]))
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//#for 32-bit transfers
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//#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S_F32::audio_block_samples*2*sizeof(i2s_rx_buffer[0]))
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void AudioInputI2S_F32::begin(void) {
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bool transferUsing32bit = true; // be official, although this is not cared about
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begin(transferUsing32bit);
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}
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void AudioInputI2S_F32::begin(bool transferUsing32bit) {
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dma.begin(true); // Allocate the DMA channel first
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AudioOutputI2S_F32::sample_rate_Hz = sample_rate_Hz; //these were given in the AudioSettings in the contructor
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AudioOutputI2S_F32::audio_block_samples = audio_block_samples;//these were given in the AudioSettings in the contructor
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//block_left_1st = NULL;
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//block_right_1st = NULL;
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// TODO: should we set & clear the I2S_RCSR_SR bit here?
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AudioOutputI2S_F32::config_i2s(transferUsing32bit);
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#if defined(KINETISK)
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CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
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dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 0); // take the full 32 bit (not just upper half)
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dma.TCD->SOFF = 0;
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dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2);
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dma.TCD->NBYTES_MLNO = 4;
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dma.TCD->SLAST = 0;
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dma.TCD->DADDR = i2s_rx_buffer;
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dma.TCD->DOFF = 4;
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//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
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dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
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//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original from Teensy Audio Library
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dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
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//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
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dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
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dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
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dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
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I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
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I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
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#elif defined(__IMXRT1062__)
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CORE_PIN8_CONFIG = 3; //1:RX_DATA0
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IOMUXC_SAI1_RX_DATA0_SELECT_INPUT = 2;
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dma.TCD->SADDR = (void *)((uint32_t)&I2S1_RDR0 + 0);
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dma.TCD->SOFF = 0;
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dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2);
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dma.TCD->NBYTES_MLNO = 4;
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dma.TCD->SLAST = 0;
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dma.TCD->DADDR = i2s_rx_buffer;
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dma.TCD->DOFF = 4;
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//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
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dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
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//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original from Teensy Audio Library
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dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
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//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
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dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
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dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
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dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI1_RX);
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I2S1_RCSR = I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
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#endif
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update_responsibility = update_setup();
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dma.enable();
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dma.attachInterrupt(isr);
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update_counter = 0;
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}
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/* void AudioInputI2S_F32::begin(bool transferUsing32bit) {
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dma.begin(true); // Allocate the DMA channel first
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AudioOutputI2S_F32::sample_rate_Hz = sample_rate_Hz; //these were given in the AudioSettings in the contructor
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AudioOutputI2S_F32::audio_block_samples = audio_block_samples;//these were given in the AudioSettings in the contructor
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//setup I2S parameters
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AudioOutputI2S_F32::config_i2s(transferUsing32bit);
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// TODO: should we set & clear the I2S_RCSR_SR bit here?
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CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
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// setup DMA parameters
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//if (transferUsing32bit) {
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sub_begin_i32();
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//} else {
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// sub_begin_i16();
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//}
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// finish DMA setup
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dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
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update_responsibility = update_setup();
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dma.enable();
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// finish I2S parameters
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I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
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I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
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//if (transferUsing32bit) {
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dma.attachInterrupt(isr_32);
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//} else {
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// dma.attachInterrupt(isr_16);
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//}
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update_counter = 0;
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} */
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/* void AudioInputI2S_F32::sub_begin_i16(void)
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{
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dma.TCD->SADDR = &I2S0_RDR0;
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dma.TCD->SOFF = 0;
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dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
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dma.TCD->NBYTES_MLNO = 2;
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dma.TCD->SLAST = 0;
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dma.TCD->DADDR = i2s_rx_buffer;
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dma.TCD->DOFF = 2;
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//dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original
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dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
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//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original
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dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
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//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original
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dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
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dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
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}; */
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/* void AudioInputI2S_F32::sub_begin_i32(void)
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{
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//let's assume that we'll transfer one sample (left or right) each call. So, it'll transfer 4 bytes (32-bits)
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dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0);
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dma.TCD->SOFF = 0; //do not increment the source memory pointer
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dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(DMA_TCD_ATTR_SIZE_32BIT) | DMA_TCD_ATTR_DSIZE(DMA_TCD_ATTR_SIZE_32BIT);
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dma.TCD->NBYTES_MLNO = 4; //one sample (32bits = 4bytes). should be 4 or 8? https://forum.pjrc.com/threads/42233-I2S-Input-Question
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dma.TCD->SLAST = 0;
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dma.TCD->DADDR = i2s_rx_buffer;
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dma.TCD->DOFF = 4; //increment one sample (32bits = 4bytes) in the destination memory
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//dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original, 16-bit
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//dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2; //revised WEA 16-bit
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//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer_32) / 4; //original, 32-bit
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dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4; //number of minor loops in a major loop. I2S_BUFFER_TO_USE_BYTES/NBYTES_MLNO? ...should be 4 or 8? https://forum.pjrc.com/threads/42233-I2S-Input-Question
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//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original, 16-bit
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//dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;//revised WEA 16-bit
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//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer_32);//original, 32-bit
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dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;//revised WEA 32-bit
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//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original, 16-bit
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//dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;//revised WEA 16-bit
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//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer_32) / 4; //original, 32-bit
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dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4; //number of minor loops in a major loop. I2S_BUFFER_TO_USE_BYTES/NBYTES_MLNO?..should be 4 or 8? https://forum.pjrc.com/threads/42233-I2S-Input-Question
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dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
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}; */
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/* void AudioInputI2S_F32::isr_16(void)
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{
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uint32_t daddr, offset;
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const int16_t *src, *end;
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int16_t *dest_left, *dest_right;
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audio_block_t *left, *right;
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//digitalWriteFast(3, HIGH);
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#if defined(KINETISK)
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daddr = (uint32_t)(dma.TCD->DADDR);
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#endif
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dma.clearInterrupt();
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//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
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if (daddr < (uint32_t)i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) {
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// DMA is receiving to the first half of the buffer
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// need to remove data from the second half
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//src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
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//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //original
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src = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
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end = (int16_t *)&i2s_rx_buffer[audio_block_samples];
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if (AudioInputI2S_F32::update_responsibility) AudioStream_F32::update_all();
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} else {
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// DMA is receiving to the second half of the buffer
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// need to remove data from the first half
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src = (int16_t *)&i2s_rx_buffer[0];
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//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
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end = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
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}
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left = AudioInputI2S_F32::block_left;
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right = AudioInputI2S_F32::block_right;
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if (left != NULL && right != NULL) {
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offset = AudioInputI2S_F32::block_offset;
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//if (offset <= AUDIO_BLOCK_SAMPLES/2) { //original
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if (offset <= ((uint32_t) audio_block_samples/2)) {
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dest_left = &(left->data[offset]);
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dest_right = &(right->data[offset]);
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//AudioInputI2S_F32::block_offset = offset + AUDIO_BLOCK_SAMPLES/2; //original
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AudioInputI2S_F32::block_offset = offset + audio_block_samples/2;
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do {
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//n = *src++;
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// *dest_left++ = (int16_t)n;
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// *dest_right++ = (int16_t)(n >> 16);
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*dest_left++ = *src++;
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*dest_right++ = *src++;
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} while (src < end);
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}
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}
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//digitalWriteFast(3, LOW);
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} */
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void AudioInputI2S_F32::isr(void)
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{
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uint32_t daddr, offset;
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const int32_t *src, *end;
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//int16_t *dest_left, *dest_right;
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//audio_block_t *left, *right;
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float32_t *dest_left_f32, *dest_right_f32;
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audio_block_f32_t *left_f32, *right_f32;
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#if defined(KINETISK) || defined(__IMXRT1062__)
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daddr = (uint32_t)(dma.TCD->DADDR);
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#endif
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dma.clearInterrupt();
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//Serial.println("isr");
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//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) { //original Teensy Audio Library
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if (daddr < (uint32_t)i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) {
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// DMA is receiving to the first half of the buffer
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// need to remove data from the second half
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//src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original Teensy Audio Library
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//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //original Teensy Audio Library
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src = (int32_t *)&i2s_rx_buffer[audio_block_samples/2];
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end = (int32_t *)&i2s_rx_buffer[audio_block_samples];
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update_counter++; //let's increment the counter here to ensure that we get every ISR resulting in audio
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if (AudioInputI2S_F32::update_responsibility) AudioStream_F32::update_all();
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} else {
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// DMA is receiving to the second half of the buffer
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// need to remove data from the first half
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src = (int32_t *)&i2s_rx_buffer[0];
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//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original Teensy Audio Library
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end = (int32_t *)&i2s_rx_buffer[audio_block_samples/2];
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}
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left_f32 = AudioInputI2S_F32::block_left_f32;
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right_f32 = AudioInputI2S_F32::block_right_f32;
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if (left_f32 != NULL && right_f32 != NULL) {
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offset = AudioInputI2S_F32::block_offset;
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//if (offset <= (uint32_t)(AUDIO_BLOCK_SAMPLES/2)) { //original Teensy Audio Library
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if (offset <= ((uint32_t) audio_block_samples/2)) {
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dest_left_f32 = &(left_f32->data[offset]);
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dest_right_f32 = &(right_f32->data[offset]);
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//AudioInputI2S_F32::block_offset = offset + AUDIO_BLOCK_SAMPLES/2; //original Teensy Audio Library
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AudioInputI2S_F32::block_offset = offset + audio_block_samples/2;
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do {
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//Serial.println(*src);
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//n = *src++;
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//*dest_left++ = (int16_t)n;
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//*dest_right++ = (int16_t)(n >> 16);
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*dest_left_f32++ = (float32_t) *src++;
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*dest_right_f32++ = (float32_t) *src++;
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} while (src < end);
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}
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}
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}
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/* void AudioInputI2S_F32::isr_32(void)
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{
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static bool flag_beenSuccessfullOnce = false;
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uint32_t daddr, offset;
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const int32_t *src_i32, *end_i32;
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//int16_t *dest_left, *dest_right;
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float32_t *dest_left_f32, *dest_right_f32;
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audio_block_f32_t *left_f32, *right_f32;
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daddr = (uint32_t)(dma.TCD->DADDR);
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dma.clearInterrupt();
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//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
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if (daddr < (uint32_t)i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) {
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// DMA is receiving to the first half of the buffer
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// need to remove data from the second half
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//src = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES];
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//end = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES*2];
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src_i32 = (int32_t *)&i2s_rx_buffer[audio_block_samples]; //WEA revised
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end_i32 = (int32_t *)&i2s_rx_buffer[audio_block_samples*2]; //WEA revised
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update_counter++; //let's increment the counter here to ensure that we get every ISR resulting in audio
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if (AudioInputI2S_F32::update_responsibility) AudioStream_F32::update_all();
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} else {
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// DMA is receiving to the second half of the buffer
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// need to remove data from the first half
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//src = (int32_t *)&i2s_rx_buffer_32[0];
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//end = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES];
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src_i32 = (int32_t *)&i2s_rx_buffer[0];
|
|
end_i32 = (int32_t *)&i2s_rx_buffer[audio_block_samples];
|
|
}
|
|
|
|
// OLD COMMENT: extract 16 but from 32 bit I2S buffer but shift to right first
|
|
// OLD COMMENT: there will be two buffers with each having "AUDIO_BLOCK_SAMPLES" samples
|
|
left_f32 = AudioInputI2S_F32::block_left_f32;
|
|
right_f32 = AudioInputI2S_F32::block_right_f32;
|
|
if ((left_f32 != NULL) && (right_f32 != NULL)) {
|
|
offset = AudioInputI2S_F32::block_offset;
|
|
//if (offset <= AUDIO_BLOCK_SAMPLES/2) { //original
|
|
if (offset <= ((uint32_t) audio_block_samples/2)) {
|
|
dest_left_f32 = &(left_f32->data[offset]);
|
|
dest_right_f32 = &(right_f32->data[offset]);
|
|
//AudioInputI2S_F32::block_offset = offset + AUDIO_BLOCK_SAMPLES/2; //original
|
|
AudioInputI2S_F32::block_offset = offset + audio_block_samples/2;
|
|
do {
|
|
//n = *src++;
|
|
// *dest_left++ = (int16_t)n;
|
|
// *dest_right++ = (int16_t)(n >> 16);
|
|
*dest_left_f32++ = (float32_t) *src_i32++;
|
|
*dest_right_f32++ = (float32_t) *src_i32++;
|
|
} while (src_i32 < end_i32);
|
|
}
|
|
flag_beenSuccessfullOnce = true;
|
|
} else {
|
|
if (flag_beenSuccessfullOnce) {
|
|
//but we were not successful this time
|
|
Serial.println("Input I2S: isr_32: WARNING!!! Null memory block.");
|
|
}
|
|
}
|
|
} */
|
|
|
|
#define I16_TO_F32_NORM_FACTOR (3.051850947599719e-05) //which is 1/32767
|
|
void AudioInputI2S_F32::scale_i16_to_f32( float32_t *p_i16, float32_t *p_f32, int len) {
|
|
for (int i=0; i<len; i++) { *p_f32++ = ((*p_i16++) * I16_TO_F32_NORM_FACTOR); }
|
|
}
|
|
#define I24_TO_F32_NORM_FACTOR (1.192093037616377e-07) //which is 1/(2^23 - 1)
|
|
void AudioInputI2S_F32::scale_i24_to_f32( float32_t *p_i24, float32_t *p_f32, int len) {
|
|
for (int i=0; i<len; i++) { *p_f32++ = ((*p_i24++) * I24_TO_F32_NORM_FACTOR); }
|
|
}
|
|
#define I32_TO_F32_NORM_FACTOR (4.656612875245797e-10) //which is 1/(2^31 - 1)
|
|
void AudioInputI2S_F32::scale_i32_to_f32( float32_t *p_i32, float32_t *p_f32, int len) {
|
|
for (int i=0; i<len; i++) { *p_f32++ = ((*p_i32++) * I32_TO_F32_NORM_FACTOR); }
|
|
}
|
|
|
|
|
|
/* void AudioInputI2S_F32::update_i16(void)
|
|
{
|
|
audio_block_t *new_left=NULL, *new_right=NULL, *out_left=NULL, *out_right=NULL;
|
|
// allocate 2 new blocks, but if one fails, allocate neither
|
|
new_left = AudioStream::allocate();
|
|
if (new_left != NULL) {
|
|
new_right = AudioStream::allocate();
|
|
if (new_right == NULL) {
|
|
flag_out_of_memory = 1;
|
|
AudioStream::release(new_left);
|
|
new_left = NULL;
|
|
}
|
|
} else {
|
|
flag_out_of_memory = 1;
|
|
}
|
|
__disable_irq();
|
|
//if (block_offset >= AUDIO_BLOCK_SAMPLES) { //original
|
|
if (block_offset >= audio_block_samples) {
|
|
// the DMA filled 2 blocks, so grab them and get the
|
|
// 2 new blocks to the DMA, as quickly as possible
|
|
out_left = block_left;
|
|
block_left = new_left;
|
|
out_right = block_right;
|
|
block_right = new_right;
|
|
block_offset = 0;
|
|
__enable_irq();
|
|
|
|
// then transmit the DMA's former blocks
|
|
|
|
// but, first, convert them to F32
|
|
audio_block_f32_t *out_left_f32=NULL, *out_right_f32=NULL;
|
|
out_left_f32 = AudioStream_F32::allocate_f32();
|
|
if (out_left_f32 != NULL) {
|
|
out_right_f32 = AudioStream_F32::allocate_f32();
|
|
if (out_right_f32 == NULL) {
|
|
flag_out_of_memory = 2;
|
|
AudioStream_F32::release(out_left_f32);
|
|
out_left_f32 = NULL;
|
|
}
|
|
} else {
|
|
flag_out_of_memory = 2;
|
|
}
|
|
if (out_left_f32 != NULL) {
|
|
//convert int16 to float 32
|
|
scale_i16_to_f32(out_left->data, out_left_f32->data, audio_block_samples);
|
|
scale_i16_to_f32(out_right->data, out_right_f32->data, audio_block_samples);
|
|
|
|
//prepare to transmit
|
|
update_counter++;
|
|
out_left_f32->id = update_counter;
|
|
out_right_f32->id = update_counter;
|
|
|
|
//transmit the f32 data!
|
|
AudioStream_F32::transmit(out_left_f32,0);
|
|
AudioStream_F32::transmit(out_right_f32,1);
|
|
AudioStream_F32::release(out_left_f32);
|
|
AudioStream_F32::release(out_right_f32);
|
|
}
|
|
AudioStream::release(out_left);
|
|
AudioStream::release(out_right);
|
|
//Serial.print(".");
|
|
} else if (new_left != NULL) {
|
|
// the DMA didn't fill blocks, but we allocated blocks
|
|
if (block_left == NULL) {
|
|
// the DMA doesn't have any blocks to fill, so
|
|
// give it the ones we just allocated
|
|
block_left = new_left;
|
|
block_right = new_right;
|
|
block_offset = 0;
|
|
__enable_irq();
|
|
} else {
|
|
// the DMA already has blocks, doesn't need these
|
|
__enable_irq();
|
|
AudioStream::release(new_left);
|
|
AudioStream::release(new_right);
|
|
}
|
|
} else {
|
|
// The DMA didn't fill blocks, and we could not allocate
|
|
// memory... the system is likely starving for memory!
|
|
// Sadly, there's nothing we can do.
|
|
__enable_irq();
|
|
}
|
|
}
|
|
*/
|
|
|
|
void AudioInputI2S_F32::update_1chan(int chan, audio_block_f32_t *&out_f32) {
|
|
if (!out_f32) return;
|
|
|
|
//scale the float values so that the maximum possible audio values span -1.0 to + 1.0
|
|
scale_i32_to_f32(out_f32->data, out_f32->data, audio_block_samples);
|
|
//scale_i16_to_f32(out_f32->data, out_f32->data, audio_block_samples);
|
|
|
|
//prepare to transmit by setting the update_counter (which helps tell if data is skipped or out-of-order)
|
|
out_f32->id = update_counter;
|
|
|
|
//transmit the f32 data!
|
|
AudioStream_F32::transmit(out_f32,chan);
|
|
|
|
//release the memory blocks
|
|
AudioStream_F32::release(out_f32);
|
|
}
|
|
|
|
void AudioInputI2S_F32::update(void)
|
|
{
|
|
static bool flag_beenSuccessfullOnce = false;
|
|
audio_block_f32_t *new_left=NULL, *new_right=NULL, *out_left=NULL, *out_right=NULL;
|
|
|
|
new_left = AudioStream_F32::allocate_f32();
|
|
new_right = AudioStream_F32::allocate_f32();
|
|
if ((!new_left) || (!new_right)) {
|
|
//ran out of memory. Clear and return!
|
|
if (new_left) AudioStream_F32::release(new_left);
|
|
if (new_right) AudioStream_F32::release(new_right);
|
|
new_left = NULL; new_right = NULL;
|
|
flag_out_of_memory = 1;
|
|
if (flag_beenSuccessfullOnce) Serial.println("Input_I2S_F32: update(): WARNING!!! Out of Memory.");
|
|
} else {
|
|
flag_beenSuccessfullOnce = true;
|
|
}
|
|
|
|
__disable_irq();
|
|
if (block_offset >= audio_block_samples) {
|
|
// the DMA filled 2 blocks, so grab them and get the
|
|
// 2 new blocks to the DMA, as quickly as possible
|
|
out_left = block_left_f32;
|
|
block_left_f32 = new_left;
|
|
out_right = block_right_f32;
|
|
block_right_f32 = new_right;
|
|
block_offset = 0;
|
|
__enable_irq();
|
|
|
|
//update_counter++; //I chose to update it in the ISR instead.
|
|
update_1chan(0,out_left); //uses audio_block_samples and update_counter
|
|
update_1chan(1,out_right); //uses audio_block_samples and update_counter
|
|
|
|
|
|
} else if (new_left != NULL) {
|
|
// the DMA didn't fill blocks, but we allocated blocks
|
|
if (block_left_f32 == NULL) {
|
|
// the DMA doesn't have any blocks to fill, so
|
|
// give it the ones we just allocated
|
|
block_left_f32 = new_left;
|
|
block_right_f32 = new_right;
|
|
block_offset = 0;
|
|
__enable_irq();
|
|
} else {
|
|
// the DMA already has blocks, doesn't need these
|
|
__enable_irq();
|
|
AudioStream_F32::release(new_left);
|
|
AudioStream_F32::release(new_right);
|
|
}
|
|
} else {
|
|
// The DMA didn't fill blocks, and we could not allocate
|
|
// memory... the system is likely starving for memory!
|
|
// Sadly, there's nothing we can do.
|
|
__enable_irq();
|
|
}
|
|
}
|
|
|
|
/******************************************************************/
|
|
|
|
|
|
void AudioInputI2Sslave_F32::begin(void)
|
|
{
|
|
dma.begin(true); // Allocate the DMA channel first
|
|
|
|
//block_left_1st = NULL;
|
|
//block_right_1st = NULL;
|
|
|
|
AudioOutputI2Sslave_F32::config_i2s();
|
|
#if defined(KINETISK)
|
|
CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
|
|
|
|
dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 0);
|
|
dma.TCD->SOFF = 0;
|
|
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2);
|
|
dma.TCD->NBYTES_MLNO = 4;
|
|
dma.TCD->SLAST = 0;
|
|
dma.TCD->DADDR = i2s_rx_buffer;
|
|
dma.TCD->DOFF = 4;
|
|
dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 4;
|
|
dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer);
|
|
dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 4;
|
|
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
|
|
|
|
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
|
|
update_responsibility = update_setup();
|
|
dma.enable();
|
|
|
|
I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
|
|
I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
|
|
dma.attachInterrupt(isr);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
void AudioInputI2Sslave::begin(void)
|
|
{
|
|
dma.begin(true); // Allocate the DMA channel first
|
|
//block_left_1st = NULL;
|
|
//block_right_1st = NULL;
|
|
AudioOutputI2Sslave::config_i2s();
|
|
CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
|
|
#if defined(KINETISK)
|
|
dma.TCD->SADDR = &I2S0_RDR0;
|
|
dma.TCD->SOFF = 0;
|
|
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
|
|
dma.TCD->NBYTES_MLNO = 2;
|
|
dma.TCD->SLAST = 0;
|
|
dma.TCD->DADDR = i2s_rx_buffer;
|
|
dma.TCD->DOFF = 2;
|
|
dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
|
|
dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer);
|
|
dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
|
|
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
|
|
#endif
|
|
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
|
|
update_responsibility = update_setup();
|
|
dma.enable();
|
|
I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
|
|
I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
|
|
dma.attachInterrupt(isr);
|
|
}
|
|
*/
|
|
|