/* 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 "output_i2s_oct.h"
#include "output_i2s.h"
#include "memcpy_audio.h"
#if defined(__IMXRT1062__)
#include "utility/imxrt_hw.h"
audio_block_t * AudioOutputI2SOct::block_ch1_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch2_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch3_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch4_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch5_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch6_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch7_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch8_1st = NULL;
audio_block_t * AudioOutputI2SOct::block_ch1_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch2_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch3_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch4_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch5_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch6_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch7_2nd = NULL;
audio_block_t * AudioOutputI2SOct::block_ch8_2nd = NULL;
uint16_t AudioOutputI2SOct::ch1_offset = 0;
uint16_t AudioOutputI2SOct::ch2_offset = 0;
uint16_t AudioOutputI2SOct::ch3_offset = 0;
uint16_t AudioOutputI2SOct::ch4_offset = 0;
uint16_t AudioOutputI2SOct::ch5_offset = 0;
uint16_t AudioOutputI2SOct::ch6_offset = 0;
uint16_t AudioOutputI2SOct::ch7_offset = 0;
uint16_t AudioOutputI2SOct::ch8_offset = 0;
bool AudioOutputI2SOct::update_responsibility = false;
DMAMEM __attribute__((aligned(32))) static uint32_t i2s_tx_buffer[AUDIO_BLOCK_SAMPLES*4];
DMAChannel AudioOutputI2SOct::dma(false);
static const uint32_t zerodata[AUDIO_BLOCK_SAMPLES/4] = {0};
void AudioOutputI2SOct::begin(void)
{
dma.begin(true); // Allocate the DMA channel first
block_ch1_1st = NULL;
block_ch2_1st = NULL;
block_ch3_1st = NULL;
block_ch4_1st = NULL;
block_ch5_1st = NULL;
block_ch6_1st = NULL;
memset(i2s_tx_buffer, 0, sizeof(i2s_tx_buffer));
AudioOutputI2S::config_i2s();
I2S1_TCR3 = I2S_TCR3_TCE_4CH;
CORE_PIN7_CONFIG = 3;
CORE_PIN32_CONFIG = 3;
CORE_PIN6_CONFIG = 3;
CORE_PIN9_CONFIG = 3;
dma.TCD->SADDR = i2s_tx_buffer;
dma.TCD->SOFF = 2;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLOFFYES = DMA_TCD_NBYTES_DMLOE |
DMA_TCD_NBYTES_MLOFFYES_MLOFF(-16) |
DMA_TCD_NBYTES_MLOFFYES_NBYTES(8);
dma.TCD->SLAST = -sizeof(i2s_tx_buffer);
dma.TCD->DADDR = (void *)((uint32_t)&I2S1_TDR0 + 2);
dma.TCD->DOFF = 4;
dma.TCD->CITER_ELINKNO = AUDIO_BLOCK_SAMPLES * 2;
dma.TCD->DLASTSGA = -16;
dma.TCD->BITER_ELINKNO = AUDIO_BLOCK_SAMPLES * 2;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI1_TX);
dma.enable();
I2S1_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE;
I2S1_TCSR = I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE;
//I2S1_TCR3 = I2S_TCR3_TCE_4CH;
update_responsibility = update_setup();
dma.attachInterrupt(isr);
}
void AudioOutputI2SOct::isr(void)
{
uint32_t saddr;
const int16_t *src1, *src2, *src3, *src4, *src5, *src6, *src7, *src8;
const int16_t *zeros = (const int16_t *)zerodata;
int16_t *dest;
saddr = (uint32_t)(dma.TCD->SADDR);
dma.clearInterrupt();
if (saddr < (uint32_t)i2s_tx_buffer + sizeof(i2s_tx_buffer) / 2) {
// DMA is transmitting the first half of the buffer
// so we must fill the second half
dest = (int16_t *)((uint32_t)i2s_tx_buffer + sizeof(i2s_tx_buffer) / 2);
if (update_responsibility) update_all();
} else {
dest = (int16_t *)i2s_tx_buffer;
}
src1 = (block_ch1_1st) ? block_ch1_1st->data + ch1_offset : zeros;
src2 = (block_ch2_1st) ? block_ch2_1st->data + ch2_offset : zeros;
src3 = (block_ch3_1st) ? block_ch3_1st->data + ch3_offset : zeros;
src4 = (block_ch4_1st) ? block_ch4_1st->data + ch4_offset : zeros;
src5 = (block_ch5_1st) ? block_ch5_1st->data + ch5_offset : zeros;
src6 = (block_ch6_1st) ? block_ch6_1st->data + ch6_offset : zeros;
src7 = (block_ch7_1st) ? block_ch7_1st->data + ch7_offset : zeros;
src8 = (block_ch8_1st) ? block_ch8_1st->data + ch8_offset : zeros;
#if 0
// TODO: optimized 8 channel copy...
memcpy_tointerleaveQuad(dest, src1, src2, src3, src4);
#else
int16_t *p=dest;
for (int i=0; i < AUDIO_BLOCK_SAMPLES/2; i++) {
*p++ = *src1++;
*p++ = *src3++;
*p++ = *src5++;
*p++ = *src7++;
*p++ = *src2++;
*p++ = *src4++;
*p++ = *src6++;
*p++ = *src8++;
}
#endif
arm_dcache_flush_delete(dest, sizeof(i2s_tx_buffer) / 2);
if (block_ch1_1st) {
if (ch1_offset == 0) {
ch1_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch1_offset = 0;
release(block_ch1_1st);
block_ch1_1st = block_ch1_2nd;
block_ch1_2nd = NULL;
}
}
if (block_ch2_1st) {
if (ch2_offset == 0) {
ch2_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch2_offset = 0;
release(block_ch2_1st);
block_ch2_1st = block_ch2_2nd;
block_ch2_2nd = NULL;
}
}
if (block_ch3_1st) {
if (ch3_offset == 0) {
ch3_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch3_offset = 0;
release(block_ch3_1st);
block_ch3_1st = block_ch3_2nd;
block_ch3_2nd = NULL;
}
}
if (block_ch4_1st) {
if (ch4_offset == 0) {
ch4_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch4_offset = 0;
release(block_ch4_1st);
block_ch4_1st = block_ch4_2nd;
block_ch4_2nd = NULL;
}
}
if (block_ch5_1st) {
if (ch5_offset == 0) {
ch5_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch5_offset = 0;
release(block_ch5_1st);
block_ch5_1st = block_ch5_2nd;
block_ch5_2nd = NULL;
}
}
if (block_ch6_1st) {
if (ch6_offset == 0) {
ch6_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch6_offset = 0;
release(block_ch6_1st);
block_ch6_1st = block_ch6_2nd;
block_ch6_2nd = NULL;
}
}
if (block_ch7_1st) {
if (ch7_offset == 0) {
ch7_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch7_offset = 0;
release(block_ch7_1st);
block_ch7_1st = block_ch7_2nd;
block_ch7_2nd = NULL;
}
}
if (block_ch8_1st) {
if (ch8_offset == 0) {
ch8_offset = AUDIO_BLOCK_SAMPLES/2;
} else {
ch8_offset = 0;
release(block_ch8_1st);
block_ch8_1st = block_ch8_2nd;
block_ch8_2nd = NULL;
}
}
}
void AudioOutputI2SOct::update(void)
{
audio_block_t *block, *tmp;
block = receiveReadOnly(0); // channel 1
if (block) {
__disable_irq();
if (block_ch1_1st == NULL) {
block_ch1_1st = block;
ch1_offset = 0;
__enable_irq();
} else if (block_ch1_2nd == NULL) {
block_ch1_2nd = block;
__enable_irq();
} else {
tmp = block_ch1_1st;
block_ch1_1st = block_ch1_2nd;
block_ch1_2nd = block;
ch1_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(1); // channel 2
if (block) {
__disable_irq();
if (block_ch2_1st == NULL) {
block_ch2_1st = block;
ch2_offset = 0;
__enable_irq();
} else if (block_ch2_2nd == NULL) {
block_ch2_2nd = block;
__enable_irq();
} else {
tmp = block_ch2_1st;
block_ch2_1st = block_ch2_2nd;
block_ch2_2nd = block;
ch2_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(2); // channel 3
if (block) {
__disable_irq();
if (block_ch3_1st == NULL) {
block_ch3_1st = block;
ch3_offset = 0;
__enable_irq();
} else if (block_ch3_2nd == NULL) {
block_ch3_2nd = block;
__enable_irq();
} else {
tmp = block_ch3_1st;
block_ch3_1st = block_ch3_2nd;
block_ch3_2nd = block;
ch3_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(3); // channel 4
if (block) {
__disable_irq();
if (block_ch4_1st == NULL) {
block_ch4_1st = block;
ch4_offset = 0;
__enable_irq();
} else if (block_ch4_2nd == NULL) {
block_ch4_2nd = block;
__enable_irq();
} else {
tmp = block_ch4_1st;
block_ch4_1st = block_ch4_2nd;
block_ch4_2nd = block;
ch4_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(4); // channel 5
if (block) {
__disable_irq();
if (block_ch5_1st == NULL) {
block_ch5_1st = block;
ch5_offset = 0;
__enable_irq();
} else if (block_ch5_2nd == NULL) {
block_ch5_2nd = block;
__enable_irq();
} else {
tmp = block_ch5_1st;
block_ch5_1st = block_ch5_2nd;
block_ch5_2nd = block;
ch5_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(5); // channel 6
if (block) {
__disable_irq();
if (block_ch6_1st == NULL) {
block_ch6_1st = block;
ch6_offset = 0;
__enable_irq();
} else if (block_ch6_2nd == NULL) {
block_ch6_2nd = block;
__enable_irq();
} else {
tmp = block_ch6_1st;
block_ch6_1st = block_ch6_2nd;
block_ch6_2nd = block;
ch6_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(6); // channel 7
if (block) {
__disable_irq();
if (block_ch7_1st == NULL) {
block_ch7_1st = block;
ch7_offset = 0;
__enable_irq();
} else if (block_ch7_2nd == NULL) {
block_ch7_2nd = block;
__enable_irq();
} else {
tmp = block_ch7_1st;
block_ch7_1st = block_ch7_2nd;
block_ch7_2nd = block;
ch7_offset = 0;
__enable_irq();
release(tmp);
}
}
block = receiveReadOnly(7); // channel 8
if (block) {
__disable_irq();
if (block_ch8_1st == NULL) {
block_ch8_1st = block;
ch8_offset = 0;
__enable_irq();
} else if (block_ch8_2nd == NULL) {
block_ch8_2nd = block;
__enable_irq();
} else {
tmp = block_ch8_1st;
block_ch8_1st = block_ch8_2nd;
block_ch8_2nd = block;
ch8_offset = 0;
__enable_irq();
release(tmp);
}
}
}
#else // not supported
void AudioOutputI2SOct::begin(void)
{
}
void AudioOutputI2SOct::update(void)
{
audio_block_t *block;
block = receiveReadOnly(0);
if (block) release(block);
block = receiveReadOnly(1);
if (block) release(block);
block = receiveReadOnly(2);
if (block) release(block);
block = receiveReadOnly(3);
if (block) release(block);
block = receiveReadOnly(4);
if (block) release(block);
block = receiveReadOnly(5);
if (block) release(block);
block = receiveReadOnly(6);
if (block) release(block);
block = receiveReadOnly(7);
if (block) release(block);
}
#endif