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6 channel I2S input for Teensy 4.0

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PaulStoffregen 4 年前
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共有 4 个文件被更改,包括 303 次插入0 次删除
  1. +1
    -0
      Audio.h
  2. +247
    -0
      input_i2s_hex.cpp
  3. +54
    -0
      input_i2s_hex.h
  4. +1
    -0
      keywords.txt

+ 1
- 0
Audio.h 查看文件

@@ -93,6 +93,7 @@
#include "input_i2s.h"
#include "input_i2s2.h"
#include "input_i2s_quad.h"
#include "input_i2s_hex.h"
#include "input_tdm.h"
#include "input_tdm2.h"
#include "input_pdm.h"

+ 247
- 0
input_i2s_hex.cpp 查看文件

@@ -0,0 +1,247 @@
/* Audio Library for Teensy 3.X
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice, development funding notice, and this permission
* notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

#include <Arduino.h>
#include "input_i2s_hex.h"
#include "output_i2s.h"

DMAMEM __attribute__((aligned(32))) static uint32_t i2s_rx_buffer[AUDIO_BLOCK_SAMPLES*3];
audio_block_t * AudioInputI2SHex::block_ch1 = NULL;
audio_block_t * AudioInputI2SHex::block_ch2 = NULL;
audio_block_t * AudioInputI2SHex::block_ch3 = NULL;
audio_block_t * AudioInputI2SHex::block_ch4 = NULL;
audio_block_t * AudioInputI2SHex::block_ch5 = NULL;
audio_block_t * AudioInputI2SHex::block_ch6 = NULL;
uint16_t AudioInputI2SHex::block_offset = 0;
bool AudioInputI2SHex::update_responsibility = false;
DMAChannel AudioInputI2SHex::dma(false);

#if defined(__IMXRT1062__)

void AudioInputI2SHex::begin(void)
{
dma.begin(true); // Allocate the DMA channel first

const int pinoffset = 0; // TODO: make this configurable...
AudioOutputI2S::config_i2s();
I2S1_RCR3 = I2S_RCR3_RCE_3CH << pinoffset;
switch (pinoffset) {
case 0:
CORE_PIN8_CONFIG = 3;
CORE_PIN6_CONFIG = 3;
CORE_PIN9_CONFIG = 3;
IOMUXC_SAI1_RX_DATA0_SELECT_INPUT = 2; // GPIO_B1_00_ALT3, pg 873
IOMUXC_SAI1_RX_DATA1_SELECT_INPUT = 1; // GPIO_B0_10_ALT3, pg 873
IOMUXC_SAI1_RX_DATA2_SELECT_INPUT = 1; // GPIO_B0_11_ALT3, pg 874
break;
case 1:
CORE_PIN6_CONFIG = 3;
CORE_PIN9_CONFIG = 3;
CORE_PIN32_CONFIG = 3;
IOMUXC_SAI1_RX_DATA1_SELECT_INPUT = 1; // GPIO_B0_10_ALT3, pg 873
IOMUXC_SAI1_RX_DATA2_SELECT_INPUT = 1; // GPIO_B0_11_ALT3, pg 874
IOMUXC_SAI1_RX_DATA3_SELECT_INPUT = 1; // GPIO_B0_12_ALT3, pg 875
break;
}
dma.TCD->SADDR = (void *)((uint32_t)&I2S1_RDR0 + 2 + pinoffset * 4);
dma.TCD->SOFF = 4;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLOFFYES = DMA_TCD_NBYTES_SMLOE |
DMA_TCD_NBYTES_MLOFFYES_MLOFF(-12) |
DMA_TCD_NBYTES_MLOFFYES_NBYTES(6);
dma.TCD->SLAST = -12;
dma.TCD->DADDR = i2s_rx_buffer;
dma.TCD->DOFF = 2;
dma.TCD->CITER_ELINKNO = AUDIO_BLOCK_SAMPLES * 2;
dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer);
dma.TCD->BITER_ELINKNO = AUDIO_BLOCK_SAMPLES * 2;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI1_RX);

//I2S1_RCSR = 0;
//I2S1_RCR3 = I2S_RCR3_RCE_2CH << pinoffset;
I2S1_RCSR = I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
update_responsibility = update_setup();
dma.enable();
dma.attachInterrupt(isr);
}

void AudioInputI2SHex::isr(void)
{
uint32_t daddr, offset;
const int16_t *src;
int16_t *dest1, *dest2, *dest3, *dest4, *dest5, *dest6;

//digitalWriteFast(3, HIGH);
daddr = (uint32_t)(dma.TCD->DADDR);
dma.clearInterrupt();

if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
// DMA is receiving to the first half of the buffer
// need to remove data from the second half
src = (int16_t *)((uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2);
if (update_responsibility) update_all();
} else {
// DMA is receiving to the second half of the buffer
// need to remove data from the first half
src = (int16_t *)&i2s_rx_buffer[0];
}
if (block_ch1) {
offset = block_offset;
if (offset <= AUDIO_BLOCK_SAMPLES/2) {
arm_dcache_delete(src, sizeof(i2s_rx_buffer) / 2);
block_offset = offset + AUDIO_BLOCK_SAMPLES/2;
dest1 = &(block_ch1->data[offset]);
dest2 = &(block_ch2->data[offset]);
dest3 = &(block_ch3->data[offset]);
dest4 = &(block_ch4->data[offset]);
dest5 = &(block_ch5->data[offset]);
dest6 = &(block_ch6->data[offset]);
for (int i=0; i < AUDIO_BLOCK_SAMPLES/2; i++) {
*dest1++ = *src++;
*dest3++ = *src++;
*dest5++ = *src++;
*dest2++ = *src++;
*dest4++ = *src++;
*dest6++ = *src++;
}
}
}
//digitalWriteFast(3, LOW);
}


void AudioInputI2SHex::update(void)
{
audio_block_t *new1, *new2, *new3, *new4, *new5, *new6;
audio_block_t *out1, *out2, *out3, *out4, *out5, *out6;

// allocate 6 new blocks
new1 = allocate();
new2 = allocate();
new3 = allocate();
new4 = allocate();
new5 = allocate();
new6 = allocate();
// but if any fails, allocate none
if (!new1 || !new2 || !new3 || !new4 || !new5 || !new6) {
if (new1) {
release(new1);
new1 = NULL;
}
if (new2) {
release(new2);
new2 = NULL;
}
if (new3) {
release(new3);
new3 = NULL;
}
if (new4) {
release(new4);
new4 = NULL;
}
if (new5) {
release(new5);
new5 = NULL;
}
if (new6) {
release(new6);
new6 = NULL;
}
}
__disable_irq();
if (block_offset >= AUDIO_BLOCK_SAMPLES) {
// the DMA filled 4 blocks, so grab them and get the
// 4 new blocks to the DMA, as quickly as possible
out1 = block_ch1;
block_ch1 = new1;
out2 = block_ch2;
block_ch2 = new2;
out3 = block_ch3;
block_ch3 = new3;
out4 = block_ch4;
block_ch4 = new4;
out5 = block_ch5;
block_ch5 = new5;
out6 = block_ch6;
block_ch6 = new6;
block_offset = 0;
__enable_irq();
// then transmit the DMA's former blocks
transmit(out1, 0);
release(out1);
transmit(out2, 1);
release(out2);
transmit(out3, 2);
release(out3);
transmit(out4, 3);
release(out4);
transmit(out5, 4);
release(out5);
transmit(out6, 5);
release(out6);
} else if (new1 != NULL) {
// the DMA didn't fill blocks, but we allocated blocks
if (block_ch1 == NULL) {
// the DMA doesn't have any blocks to fill, so
// give it the ones we just allocated
block_ch1 = new1;
block_ch2 = new2;
block_ch3 = new3;
block_ch4 = new4;
block_ch5 = new5;
block_ch6 = new6;
block_offset = 0;
__enable_irq();
} else {
// the DMA already has blocks, doesn't need these
__enable_irq();
release(new1);
release(new2);
release(new3);
release(new4);
release(new5);
release(new6);
}
} 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();
}
}

#else // not supported

void AudioInputI2SHex::begin(void)
{
}



#endif


+ 54
- 0
input_i2s_hex.h 查看文件

@@ -0,0 +1,54 @@
/* Audio Library for Teensy 3.X
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice, development funding notice, and this permission
* notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

#ifndef _input_i2s_hex_h_
#define _input_i2s_hex_h_

#include "Arduino.h"
#include "AudioStream.h"
#include "DMAChannel.h"

class AudioInputI2SHex : public AudioStream
{
public:
AudioInputI2SHex(void) : AudioStream(0, NULL) { begin(); }
virtual void update(void);
void begin(void);
private:
static bool update_responsibility;
static DMAChannel dma;
static void isr(void);
static audio_block_t *block_ch1;
static audio_block_t *block_ch2;
static audio_block_t *block_ch3;
static audio_block_t *block_ch4;
static audio_block_t *block_ch5;
static audio_block_t *block_ch6;
static uint16_t block_offset;
};


#endif

+ 1
- 0
keywords.txt 查看文件

@@ -3,6 +3,7 @@ AudioConnection KEYWORD2
AudioInputI2S KEYWORD2
AudioInputI2S2 KEYWORD2
AudioInputI2SQuad KEYWORD2
AudioInputI2SHex KEYWORD2
AudioInputI2Sslave KEYWORD2
AudioInputTDM KEYWORD2
AudioInputTDM2 KEYWORD2

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