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full resolution for I2S input, all 32 bits are read and converted to float (instead of only upper 16 bit)

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pull/14/head
joerg 2 years ago
parent 4fe37d5d95
commit d9efa3143a
1 changed files with 27 additions and 27 deletions
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  1. 54
      input_i2s_f32.cpp

54
input_i2s_f32.cpp
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@ -40,7 +40,7 @@
#include <arm_math.h>
//DMAMEM __attribute__((aligned(32)))
static uint32_t i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //good for 16-bit audio samples coming in from teh AIC. 32-bit transfers will need this to be bigger.
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;
uint16_t AudioInputI2S_F32::block_offset = 0;
@ -60,7 +60,7 @@ int AudioInputI2S_F32::audio_block_samples = AUDIO_BLOCK_SAMPLES;
//#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S_F32::audio_block_samples*2*sizeof(i2s_rx_buffer[0]))
void AudioInputI2S_F32::begin(void) {
bool transferUsing32bit = false;
bool transferUsing32bit = true; // be official, although this is not cared about
begin(transferUsing32bit);
}
@ -78,19 +78,19 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
#if defined(KINETISK)
CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 2); //From Teensy Audio Library...but why "+ 2" (Chip 2020-10-31)
dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 0); // take the full 32 bit (not just upper half)
dma.TCD->SOFF = 0;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLNO = 2;
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 = 2;
dma.TCD->DOFF = 4;
//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original from Teensy Audio Library
dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
@ -101,19 +101,19 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
CORE_PIN8_CONFIG = 3; //1:RX_DATA0
IOMUXC_SAI1_RX_DATA0_SELECT_INPUT = 2;
dma.TCD->SADDR = (void *)((uint32_t)&I2S1_RDR0 + 2);
dma.TCD->SADDR = (void *)((uint32_t)&I2S1_RDR0 + 0);
dma.TCD->SOFF = 0;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLNO = 2;
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 = 2;
dma.TCD->DOFF = 4;
//dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
//dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original from Teensy Audio Library
dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original from Teensy Audio Library
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI1_RX);
@ -265,7 +265,7 @@ void AudioInputI2S_F32::begin(bool transferUsing32bit) {
void AudioInputI2S_F32::isr(void)
{
uint32_t daddr, offset;
const int16_t *src, *end;
const int32_t *src, *end;
//int16_t *dest_left, *dest_right;
//audio_block_t *left, *right;
float32_t *dest_left_f32, *dest_right_f32;
@ -283,16 +283,16 @@ void AudioInputI2S_F32::isr(void)
// need to remove data from the second half
//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 = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
end = (int16_t *)&i2s_rx_buffer[audio_block_samples];
src = (int32_t *)&i2s_rx_buffer[audio_block_samples/2];
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 {
// 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];
src = (int32_t *)&i2s_rx_buffer[0];
//end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original Teensy Audio Library
end = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
end = (int32_t *)&i2s_rx_buffer[audio_block_samples/2];
}
left_f32 = AudioInputI2S_F32::block_left_f32;
right_f32 = AudioInputI2S_F32::block_right_f32;
@ -480,8 +480,8 @@ void AudioInputI2S_F32::scale_i32_to_f32( float32_t *p_i32, float32_t *p_f32, in
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);
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;
@ -564,16 +564,16 @@ void AudioInputI2Sslave_F32::begin(void)
#if defined(KINETISK)
CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 2);
dma.TCD->SADDR = (void *)((uint32_t)&I2S0_RDR0 + 0);
dma.TCD->SOFF = 0;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLNO = 2;
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 = 2;
dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
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) / 2;
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);

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