152 lines
4.7 KiB
C++
152 lines
4.7 KiB
C++
/* Audio Library for Teensy 3.X
|
|
* Copyright (c) 2017, 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.
|
|
*/
|
|
|
|
#if defined(__IMXRT1062__)
|
|
#include <Arduino.h>
|
|
#include "input_tdm2.h"
|
|
#include "output_tdm2.h"
|
|
#include "utility/imxrt_hw.h"
|
|
|
|
DMAMEM __attribute__((aligned(32)))
|
|
static uint32_t tdm_rx_buffer[AUDIO_BLOCK_SAMPLES*16];
|
|
audio_block_t * AudioInputTDM2::block_incoming[16] = {
|
|
nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
|
|
nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr
|
|
};
|
|
bool AudioInputTDM2::update_responsibility = false;
|
|
DMAChannel AudioInputTDM2::dma(false);
|
|
|
|
|
|
void AudioInputTDM2::begin(void)
|
|
{
|
|
dma.begin(true); // Allocate the DMA channel first
|
|
|
|
// TODO: should we set & clear the I2S_RCSR_SR bit here?
|
|
AudioOutputTDM2::config_tdm();
|
|
|
|
CORE_PIN5_CONFIG = 2; //2:RX_DATA0
|
|
IOMUXC_SAI2_RX_DATA0_SELECT_INPUT = 0;
|
|
dma.TCD->SADDR = &I2S2_RDR0;
|
|
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 = tdm_rx_buffer;
|
|
dma.TCD->DOFF = 4;
|
|
dma.TCD->CITER_ELINKNO = sizeof(tdm_rx_buffer) / 4;
|
|
dma.TCD->DLASTSGA = -sizeof(tdm_rx_buffer);
|
|
dma.TCD->BITER_ELINKNO = sizeof(tdm_rx_buffer) / 4;
|
|
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
|
|
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_RX);
|
|
update_responsibility = update_setup();
|
|
dma.enable();
|
|
|
|
I2S2_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
|
|
I2S2_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE;
|
|
dma.attachInterrupt(isr);
|
|
|
|
}
|
|
|
|
// TODO: needs optimization...
|
|
static void memcpy_tdm_rx(uint32_t *dest1, uint32_t *dest2, const uint32_t *src)
|
|
{
|
|
uint32_t i, in1, in2;
|
|
|
|
for (i=0; i < AUDIO_BLOCK_SAMPLES/2; i++) {
|
|
in1 = *src;
|
|
in2 = *(src+8);
|
|
src += 16;
|
|
*dest1++ = (in1 >> 16) | (in2 & 0xFFFF0000);
|
|
*dest2++ = (in1 << 16) | (in2 & 0x0000FFFF);
|
|
}
|
|
}
|
|
|
|
void AudioInputTDM2::isr(void)
|
|
{
|
|
uint32_t daddr;
|
|
const uint32_t *src;
|
|
unsigned int i;
|
|
|
|
daddr = (uint32_t)(dma.TCD->DADDR);
|
|
dma.clearInterrupt();
|
|
|
|
if (daddr < (uint32_t)tdm_rx_buffer + sizeof(tdm_rx_buffer) / 2) {
|
|
// DMA is receiving to the first half of the buffer
|
|
// need to remove data from the second half
|
|
src = &tdm_rx_buffer[AUDIO_BLOCK_SAMPLES*8];
|
|
} else {
|
|
// DMA is receiving to the second half of the buffer
|
|
// need to remove data from the first half
|
|
src = &tdm_rx_buffer[0];
|
|
}
|
|
if (block_incoming[0] != nullptr) {
|
|
#if IMXRT_CACHE_ENABLED >=1
|
|
arm_dcache_delete((void*)src, sizeof(tdm_rx_buffer) / 2);
|
|
#endif
|
|
for (i=0; i < 16; i += 2) {
|
|
uint32_t *dest1 = (uint32_t *)(block_incoming[i]->data);
|
|
uint32_t *dest2 = (uint32_t *)(block_incoming[i+1]->data);
|
|
memcpy_tdm_rx(dest1, dest2, src);
|
|
src++;
|
|
}
|
|
}
|
|
if (update_responsibility) update_all();
|
|
}
|
|
|
|
|
|
void AudioInputTDM2::update(void)
|
|
{
|
|
unsigned int i, j;
|
|
audio_block_t *new_block[16];
|
|
audio_block_t *out_block[16];
|
|
|
|
// allocate 16 new blocks. If any fails, allocate none
|
|
for (i=0; i < 16; i++) {
|
|
new_block[i] = allocate();
|
|
if (new_block[i] == nullptr) {
|
|
for (j=0; j < i; j++) {
|
|
release(new_block[j]);
|
|
}
|
|
memset(new_block, 0, sizeof(new_block));
|
|
break;
|
|
}
|
|
}
|
|
__disable_irq();
|
|
memcpy(out_block, block_incoming, sizeof(out_block));
|
|
memcpy(block_incoming, new_block, sizeof(block_incoming));
|
|
__enable_irq();
|
|
if (out_block[0] != nullptr) {
|
|
// if we got 1 block, all 16 are filled
|
|
for (i=0; i < 16; i++) {
|
|
transmit(out_block[i], i);
|
|
release(out_block[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|