@ -1,6 +1,6 @@
/*
* input_i2s_f32 . cpp
*
*
* Audio Library for Teensy 3. X
* Copyright ( c ) 2014 , Paul Stoffregen , paul @ pjrc . com
*
@ -26,20 +26,20 @@
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE .
*/
/*
/*
* Extended by Chip Audette , OpenAudio , May 2019
* Converted to F32 and to variable audio block length
* The F32 conversion is under the MIT License . Use at your own risk .
*/
// Updated OpenAudio F32 with this version from Chip Audette's Tympan Library Jan 2021 RSL
// Removed unused pieces. RSL 30 May 2022
# include <Arduino.h> //do we really need this? (Chip: 2020-10-31)
# include "input_i2s_f32.h"
# include "output_i2s_f32.h"
# include <arm_math.h>
//DMAMEM __attribute__((aligned(32)))
//DMAMEM __attribute__((aligned(32)))
static uint64_t i2s_rx_buffer [ AUDIO_BLOCK_SAMPLES ] ; // Two 32-bit transfers per sample.
audio_block_f32_t * AudioInputI2S_F32 : : block_left_f32 = NULL ;
audio_block_f32_t * AudioInputI2S_F32 : : block_right_f32 = NULL ;
@ -69,7 +69,7 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
AudioOutputI2S_F32 : : sample_rate_Hz = sample_rate_Hz ; //these were given in the AudioSettings in the contructor
AudioOutputI2S_F32 : : audio_block_samples = audio_block_samples ; //these were given in the AudioSettings in the contructor
//block_left_1st = NULL;
//block_right_1st = NULL;
@ -100,7 +100,7 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
# elif defined(__IMXRT1062__)
CORE_PIN8_CONFIG = 3 ; //1:RX_DATA0
IOMUXC_SAI1_RX_DATA0_SELECT_INPUT = 2 ;
dma . TCD - > SADDR = ( void * ) ( ( uint32_t ) & I2S1_RDR0 + 0 ) ;
dma . TCD - > SOFF = 0 ;
dma . TCD - > ATTR = DMA_TCD_ATTR_SSIZE ( 2 ) | DMA_TCD_ATTR_DSIZE ( 2 ) ;
@ -122,145 +122,9 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
update_responsibility = update_setup ( ) ;
dma . enable ( ) ;
dma . attachInterrupt ( isr ) ;
update_counter = 0 ;
}
/* void AudioInputI2S_F32::begin(bool transferUsing32bit) {
dma . begin ( true ) ; // Allocate the DMA channel first
AudioOutputI2S_F32 : : sample_rate_Hz = sample_rate_Hz ; //these were given in the AudioSettings in the contructor
AudioOutputI2S_F32 : : audio_block_samples = audio_block_samples ; //these were given in the AudioSettings in the contructor
//setup I2S parameters
AudioOutputI2S_F32 : : config_i2s ( transferUsing32bit ) ;
// TODO: should we set & clear the I2S_RCSR_SR bit here?
CORE_PIN13_CONFIG = PORT_PCR_MUX ( 4 ) ; // pin 13, PTC5, I2S0_RXD0
// setup DMA parameters
//if (transferUsing32bit) {
sub_begin_i32 ( ) ;
//} else {
// sub_begin_i16();
//}
// finish DMA setup
dma . triggerAtHardwareEvent ( DMAMUX_SOURCE_I2S0_RX ) ;
update_responsibility = update_setup ( ) ;
dma . enable ( ) ;
// finish I2S parameters
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
//if (transferUsing32bit) {
dma . attachInterrupt ( isr_32 ) ;
//} else {
// dma.attachInterrupt(isr_16);
//}
update_counter = 0 ;
} */
/* void AudioInputI2S_F32::sub_begin_i16(void)
{
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_tx_buffer) / 2; //original
dma . TCD - > CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2 ;
//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original
dma . TCD - > DLASTSGA = - I2S_BUFFER_TO_USE_BYTES ;
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original
dma . TCD - > BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2 ;
dma . TCD - > CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR ;
} ; */
/* void AudioInputI2S_F32::sub_begin_i32(void)
{
//let's assume that we'll transfer one sample (left or right) each call. So, it'll transfer 4 bytes (32-bits)
dma . TCD - > SADDR = ( void * ) ( ( uint32_t ) & I2S0_RDR0 ) ;
dma . TCD - > SOFF = 0 ; //do not increment the source memory pointer
dma . TCD - > ATTR = DMA_TCD_ATTR_SSIZE ( DMA_TCD_ATTR_SIZE_32BIT ) | DMA_TCD_ATTR_DSIZE ( DMA_TCD_ATTR_SIZE_32BIT ) ;
dma . TCD - > NBYTES_MLNO = 4 ; //one sample (32bits = 4bytes). should be 4 or 8? https://forum.pjrc.com/threads/42233-I2S-Input-Question
dma . TCD - > SLAST = 0 ;
dma . TCD - > DADDR = i2s_rx_buffer ;
dma . TCD - > DOFF = 4 ; //increment one sample (32bits = 4bytes) in the destination memory
//dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original, 16-bit
//dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2; //revised WEA 16-bit
//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer_32) / 4; //original, 32-bit
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
//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original, 16-bit
//dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;//revised WEA 16-bit
//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer_32);//original, 32-bit
dma . TCD - > DLASTSGA = - I2S_BUFFER_TO_USE_BYTES ; //revised WEA 32-bit
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original, 16-bit
//dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;//revised WEA 16-bit
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer_32) / 4; //original, 32-bit
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
dma . TCD - > CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR ;
} ; */
/* void AudioInputI2S_F32::isr_16(void)
{
uint32_t daddr , offset ;
const int16_t * src , * end ;
int16_t * dest_left , * dest_right ;
audio_block_t * left , * right ;
//digitalWriteFast(3, HIGH);
# if defined(KINETISK)
daddr = ( uint32_t ) ( dma . TCD - > DADDR ) ;
# endif
dma . clearInterrupt ( ) ;
//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
if ( daddr < ( uint32_t ) i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2 ) {
// DMA is receiving to the first half of the buffer
// need to remove data from the second half
//src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //original
src = ( int16_t * ) & i2s_rx_buffer [ audio_block_samples / 2 ] ;
end = ( int16_t * ) & i2s_rx_buffer [ audio_block_samples ] ;
if ( AudioInputI2S_F32 : : update_responsibility ) AudioStream_F32 : : 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 ] ;
//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
end = ( int16_t * ) & i2s_rx_buffer [ audio_block_samples / 2 ] ;
}
left = AudioInputI2S_F32 : : block_left ;
right = AudioInputI2S_F32 : : block_right ;
if ( left ! = NULL & & right ! = NULL ) {
offset = AudioInputI2S_F32 : : block_offset ;
//if (offset <= AUDIO_BLOCK_SAMPLES/2) { //original
if ( offset < = ( ( uint32_t ) audio_block_samples / 2 ) ) {
dest_left = & ( left - > data [ offset ] ) ;
dest_right = & ( right - > 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 + + = * src + + ;
* dest_right + + = * src + + ;
} while ( src < end ) ;
}
}
//digitalWriteFast(3, LOW);
} */
}
void AudioInputI2S_F32 : : isr ( void )
{
@ -275,7 +139,6 @@ void AudioInputI2S_F32::isr(void)
daddr = ( uint32_t ) ( dma . TCD - > DADDR ) ;
# endif
dma . clearInterrupt ( ) ;
//Serial.println("isr");
//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) { //original Teensy Audio Library
if ( daddr < ( uint32_t ) i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2 ) {
@ -284,7 +147,7 @@ void AudioInputI2S_F32::isr(void)
//src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original Teensy Audio Library
//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //original Teensy Audio Library
src = ( int32_t * ) & i2s_rx_buffer [ audio_block_samples / 2 ] ;
end = ( int32_t * ) & i2s_rx_buffer [ audio_block_samples ] ;
end = ( int32_t * ) & i2s_rx_buffer [ audio_block_samples ] ;
update_counter + + ; //let's increment the counter here to ensure that we get every ISR resulting in audio
if ( AudioInputI2S_F32 : : update_responsibility ) AudioStream_F32 : : update_all ( ) ;
} else {
@ -316,68 +179,7 @@ void AudioInputI2S_F32::isr(void)
}
}
/* void AudioInputI2S_F32::isr_32(void)
{
static bool flag_beenSuccessfullOnce = false ;
uint32_t daddr , offset ;
const int32_t * src_i32 , * end_i32 ;
//int16_t *dest_left, *dest_right;
float32_t * dest_left_f32 , * dest_right_f32 ;
audio_block_f32_t * left_f32 , * right_f32 ;
daddr = ( uint32_t ) ( dma . TCD - > DADDR ) ;
dma . clearInterrupt ( ) ;
//if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
if ( daddr < ( uint32_t ) i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2 ) {
// DMA is receiving to the first half of the buffer
// need to remove data from the second half
//src = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES];
//end = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES*2];
src_i32 = ( int32_t * ) & i2s_rx_buffer [ audio_block_samples ] ; //WEA revised
end_i32 = ( int32_t * ) & i2s_rx_buffer [ audio_block_samples * 2 ] ; //WEA revised
update_counter + + ; //let's increment the counter here to ensure that we get every ISR resulting in audio
if ( AudioInputI2S_F32 : : update_responsibility ) AudioStream_F32 : : update_all ( ) ;
} else {
// DMA is receiving to the second half of the buffer
// need to remove data from the first half
//src = (int32_t *)&i2s_rx_buffer_32[0];
//end = (int32_t *)&i2s_rx_buffer_32[AUDIO_BLOCK_SAMPLES];
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
# 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 ) ; }
}
@ -390,114 +192,28 @@ void AudioInputI2S_F32::scale_i32_to_f32( float32_t *p_i32, float32_t *p_f32, in
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 ) ) {
@ -510,7 +226,7 @@ void AudioInputI2S_F32::update(void)
} else {
flag_beenSuccessfullOnce = true ;
}
__disable_irq ( ) ;
if ( block_offset > = audio_block_samples ) {
// the DMA filled 2 blocks, so grab them and get the
@ -521,12 +237,12 @@ void AudioInputI2S_F32::update(void)
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 ) {
@ -583,35 +299,6 @@ void AudioInputI2Sslave_F32::begin(void)
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 ) ;
}
*/