diff --git a/OpenAudio_ArduinoLibrary.h b/OpenAudio_ArduinoLibrary.h index 5498a1d..38d526e 100644 --- a/OpenAudio_ArduinoLibrary.h +++ b/OpenAudio_ArduinoLibrary.h @@ -26,6 +26,7 @@ #include "input_spdif3_f32.h" #include "async_input_spdif3_F32.h" #include "output_i2s_f32.h" +#include "output_i2s2_f32.h" #include "output_spdif3_f32.h" #include "play_queue_f32.h" #include "record_queue_f32.h" diff --git a/output_i2s2_f32.cpp b/output_i2s2_f32.cpp new file mode 100644 index 0000000..839240f --- /dev/null +++ b/output_i2s2_f32.cpp @@ -0,0 +1,465 @@ +/* + * ***** output_i2s_f32.cpp ***** + * + * 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. + */ + /* + * 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 old commented out code. RSL 30 May 2022 + +#include "output_i2s2_f32.h" +#include +#include //to get access to Audio/utlity/imxrt_hw.h...do we really need this??? WEA 2020-10-31 + +float AudioOutputI2S2_F32::setI2SFreq_T3(const float freq_Hz) { + return 0.0f; +} + +audio_block_f32_t * AudioOutputI2S2_F32::block_left_1st = NULL; +audio_block_f32_t * AudioOutputI2S2_F32::block_right_1st = NULL; +audio_block_f32_t * AudioOutputI2S2_F32::block_left_2nd = NULL; +audio_block_f32_t * AudioOutputI2S2_F32::block_right_2nd = NULL; +uint16_t AudioOutputI2S2_F32::block_left_offset = 0; +uint16_t AudioOutputI2S2_F32::block_right_offset = 0; +bool AudioOutputI2S2_F32::update_responsibility = false; +DMAChannel AudioOutputI2S2_F32::dma(false); +DMAMEM __attribute__((aligned(32))) static uint64_t i2s2_tx_buffer[AUDIO_BLOCK_SAMPLES]; +//DMAMEM static int32_t i2s2_tx_buffer[2*AUDIO_BLOCK_SAMPLES]; //2 channels at 32-bits per sample. Local "audio_block_samples" should be no larger than global "AUDIO_BLOCK_SAMPLES" + +float AudioOutputI2S2_F32::sample_rate_Hz = AUDIO_SAMPLE_RATE; +int AudioOutputI2S2_F32::audio_block_samples = AUDIO_BLOCK_SAMPLES; + +#if defined(__IMXRT1062__) +#include //from Teensy Audio library. For set_audioClock() +#endif + +//#for 16-bit transfers +#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S2_F32::audio_block_samples*sizeof(i2s2_tx_buffer[0])) + +//#for 32-bit transfers +//#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S2_F32::audio_block_samples*2*sizeof(i2s2_tx_buffer[0])) + +void AudioOutputI2S2_F32::begin(void) +{ + bool transferUsing32bit = false; + begin(transferUsing32bit); +} + +void AudioOutputI2S2_F32::begin(bool transferUsing32bit) { + + dma.begin(true); // Allocate the DMA channel first + + block_left_1st = NULL; + block_right_1st = NULL; + + AudioOutputI2S2_F32::config_i2s(transferUsing32bit, sample_rate_Hz); + + // if AudioInputI2S2 set I2S_TCSR_TE (for clock sync), disable it + I2S2_TCSR = 0; + while (I2S2_TCSR & I2S_TCSR_TE) ; //wait for transmit disabled + + CORE_PIN2_CONFIG = 2; //EMC_04, 2=SAI2_TX_DATA, page 428 + + dma.TCD->SADDR = i2s2_tx_buffer; + dma.TCD->SOFF = 4; + dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2); + dma.TCD->NBYTES_MLNO = 4; + //dma.TCD->SLAST = -sizeof(i2s2_tx_buffer);//orig from Teensy Audio Library 2020-10-31 + dma.TCD->SLAST = -I2S_BUFFER_TO_USE_BYTES; + dma.TCD->DOFF = 0; + //dma.TCD->CITER_ELINKNO = sizeof(i2s2_tx_buffer) / 2; //orig from Teensy Audio Library 2020-10-31 + dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4; + dma.TCD->DLASTSGA = 0; + //dma.TCD->BITER_ELINKNO = sizeof(i2s2_tx_buffer) / 2;//orig from Teensy Audio Library 2020-10-31 + dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 4; + dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR; + dma.TCD->DADDR = (void *)((uint32_t)&I2S2_TDR0 + 0); + dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_TX); + dma.enable(); //newer location of this line in Teensy Audio library + + // I2S1_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE; // from output_i2s_f32.cpp + // I2S1_TCSR = I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE; // from output_i2s_f32.cpp + I2S2_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE | I2S_TCSR_FR; + + update_responsibility = update_setup(); + dma.attachInterrupt(AudioOutputI2S2_F32::isr); + //dma.enable(); //original location of this line in older Tympan_Library + + enabled = 1; + + //AudioInputI2S_F32::begin_guts(); +} + +void AudioOutputI2S2_F32::isr(void) +{ + int32_t *dest; + audio_block_f32_t *blockL, *blockR; + uint32_t saddr, offsetL, offsetR; + + saddr = (uint32_t)(dma.TCD->SADDR); + dma.clearInterrupt(); + //if (saddr < (uint32_t)i2s2_tx_buffer + sizeof(i2s2_tx_buffer) / 2) { //original 16-bit + if (saddr < (uint32_t)i2s2_tx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) { //are we transmitting the first half or second half of the buffer? + // DMA is transmitting the first half of the buffer + // so we must fill the second half + //dest = (int16_t *)&i2s2_tx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original Teensy Audio + dest = (int32_t *)&i2s2_tx_buffer[audio_block_samples/2]; //this will be diff if we were to do 32-bit samples + if (AudioOutputI2S2_F32::update_responsibility) AudioStream_F32::update_all(); + } else { + // DMA is transmitting the second half of the buffer + // so we must fill the first half + dest = (int32_t *)i2s2_tx_buffer; + } + + blockL = AudioOutputI2S2_F32::block_left_1st; + blockR = AudioOutputI2S2_F32::block_right_1st; + offsetL = AudioOutputI2S2_F32::block_left_offset; + offsetR = AudioOutputI2S2_F32::block_right_offset; + + int32_t *d = dest; + if (blockL && blockR) { + //memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR); + //memcpy_tointerleaveLRwLen(dest, blockL->data + offsetL, blockR->data + offsetR, audio_block_samples/2); + float32_t *pL = blockL->data + offsetL; + float32_t *pR = blockR->data + offsetR; + for (int i=0; i < audio_block_samples/2; i++) { + *d++ = (int32_t) *pL++; + *d++ = (int32_t) *pR++; //interleave + //*d++ = 0; + //*d++ = 0; + } + offsetL += audio_block_samples / 2; + offsetR += audio_block_samples / 2; + } else if (blockL) { + //memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR); + float32_t *pL = blockL->data + offsetL; + for (int i=0; i < audio_block_samples / 2 * 2; i+=2) { *(d+i) = (int32_t) *pL++; } //interleave + offsetL += audio_block_samples / 2; + } else if (blockR) { + float32_t *pR = blockR->data + offsetR; + for (int i=0; i < audio_block_samples /2 * 2; i+=2) { *(d+i) = (int32_t) *pR++; } //interleave + offsetR += audio_block_samples / 2; + } else { + //memset(dest,0,AUDIO_BLOCK_SAMPLES * 2); + memset(dest,0,audio_block_samples * 4); + return; + } + + arm_dcache_flush_delete(dest, sizeof(i2s2_tx_buffer) / 2 ); + + //if (offsetL < AUDIO_BLOCK_SAMPLES) { //orig Teensy Audio + if (offsetL < (uint16_t)audio_block_samples) { + AudioOutputI2S2_F32::block_left_offset = offsetL; + } else { + AudioOutputI2S2_F32::block_left_offset = 0; + AudioStream_F32::release(blockL); + AudioOutputI2S2_F32::block_left_1st = AudioOutputI2S2_F32::block_left_2nd; + AudioOutputI2S2_F32::block_left_2nd = NULL; + } + //if (offsetR < AUDIO_BLOCK_SAMPLES) { //orig Teensy Audio + if (offsetR < (uint16_t)audio_block_samples) { + AudioOutputI2S2_F32::block_right_offset = offsetR; + } else { + AudioOutputI2S2_F32::block_right_offset = 0; + AudioStream_F32::release(blockR); + AudioOutputI2S2_F32::block_right_1st = AudioOutputI2S2_F32::block_right_2nd; + AudioOutputI2S2_F32::block_right_2nd = NULL; + } +} + +#define F32_TO_I16_NORM_FACTOR (32767) //which is 2^15-1 +void AudioOutputI2S2_F32::scale_f32_to_i16(float32_t *p_f32, float32_t *p_i16, int len) { + for (int i=0; ilength != audio_block_samples) { + Serial.print("AudioOutputI2S2_F32: *** WARNING ***: audio_block says len = "); + Serial.print(block_f32->length); + Serial.print(", but I2S settings want it to be = "); + Serial.println(audio_block_samples); + } + //Serial.print("AudioOutputI2S2_F32: audio_block_samples = "); + //Serial.println(audio_block_samples); + + // Optional scaling for easy volume control. Leave outputScale==1.0f for default + if(outputScale<1.0f || outputScale>1.0f) + arm_scale_f32 (block_f32->data, outputScale, block_f32->data, block_f32->length); + + //scale F32 to Int32 + //block_f32_scaled = AudioStream_F32::allocate_f32(); + scale_f32_to_i32(block_f32->data, block_f32_scaled->data, audio_block_samples); + //scale_f32_to_i16(block_f32->data, block_f32_scaled->data, audio_block_samples); + + //now process the data blocks + __disable_irq(); + if (block_left_1st == NULL) { + block_left_1st = block_f32_scaled; + block_left_offset = 0; + __enable_irq(); + } else if (block_left_2nd == NULL) { + block_left_2nd = block_f32_scaled; + __enable_irq(); + } else { + audio_block_f32_t *tmp = block_left_1st; + block_left_1st = block_left_2nd; + block_left_2nd = block_f32_scaled; + block_left_offset = 0; + __enable_irq(); + AudioStream_F32::release(tmp); + } + AudioStream_F32::transmit(block_f32,0); AudioStream_F32::release(block_f32); //echo the incoming audio out the outputs + } else { + //this branch should never get called, but if it does, let's release the buffer that was never used + AudioStream_F32::release(block_f32_scaled); + } + + block_f32_scaled = block2_f32_scaled; //this is simply renaming the pre-allocated buffer + + block_f32 = receiveReadOnly_f32(1); // input 1 = right channel + if (block_f32) { + // Optional scaling for easy volume control. Leave outputScale==1.0f for default + if(outputScale<1.0f || outputScale>1.0f) + arm_scale_f32 (block_f32->data, outputScale, block_f32->data, block_f32->length); + + //scale F32 to Int32 + //block_f32_scaled = AudioStream_F32::allocate_f32(); + scale_f32_to_i32(block_f32->data, block_f32_scaled->data, audio_block_samples); + //scale_f32_to_i16(block_f32->data, block_f32_scaled->data, audio_block_samples); + + __disable_irq(); + if (block_right_1st == NULL) { + block_right_1st = block_f32_scaled; + block_right_offset = 0; + __enable_irq(); + } else if (block_right_2nd == NULL) { + block_right_2nd = block_f32_scaled; + __enable_irq(); + } else { + audio_block_f32_t *tmp = block_right_1st; + block_right_1st = block_right_2nd; + block_right_2nd = block_f32_scaled; + block_right_offset = 0; + __enable_irq(); + AudioStream_F32::release(tmp); + } + AudioStream_F32::transmit(block_f32,1); AudioStream_F32::release(block_f32); //echo the incoming audio out the outputs + } else { + //this branch should never get called, but if it does, let's release the buffer that was never used + AudioStream_F32::release(block_f32_scaled); + } +} + + +void AudioOutputI2S2_F32::config_i2s(void) { config_i2s(false, AudioOutputI2S2_F32::sample_rate_Hz); } +void AudioOutputI2S2_F32::config_i2s(bool transferUsing32bit) { config_i2s(transferUsing32bit, AudioOutputI2S2_F32::sample_rate_Hz); } +void AudioOutputI2S2_F32::config_i2s(float fs_Hz) { config_i2s(false, fs_Hz); } + +void AudioOutputI2S2_F32::config_i2s(bool transferUsing32bit, float fs_Hz) +{ + CCM_CCGR5 |= CCM_CCGR5_SAI2(CCM_CCGR_ON); + + // if either transmitter or receiver is enabled, do nothing + if (I2S2_TCSR & I2S_TCSR_TE) return; + if (I2S2_RCSR & I2S_RCSR_RE) return; +//PLL: + //int fs = AUDIO_SAMPLE_RATE_EXACT; //original from Teensy Audio Library + int fs = fs_Hz; + + // PLL between 27*24 = 648MHz und 54*24=1296MHz + int n1 = 4; //SAI prescaler 4 => (n1*n2) = multiple of 4 + int n2 = 1 + (24000000 * 27) / (fs * 256 * n1); + + double C = ((double)fs * 256 * n1 * n2) / 24000000; + int c0 = C; + int c2 = 10000; + int c1 = C * c2 - (c0 * c2); + set_audioClock(c0, c1, c2); + + // clear SAI2_CLK register locations + CCM_CSCMR1 = (CCM_CSCMR1 & ~(CCM_CSCMR1_SAI2_CLK_SEL_MASK)) + | CCM_CSCMR1_SAI2_CLK_SEL(2); + CCM_CS2CDR = (CCM_CS2CDR & ~(CCM_CS2CDR_SAI2_CLK_PRED_MASK | CCM_CS2CDR_SAI2_CLK_PODF_MASK)) + | CCM_CS2CDR_SAI2_CLK_PRED(n1-1) // &0x07 + | CCM_CS2CDR_SAI2_CLK_PODF(n2-1); // &0x3f + + // Select MCLK + IOMUXC_GPR_GPR1 = (IOMUXC_GPR_GPR1 + & ~(IOMUXC_GPR_GPR1_SAI2_MCLK3_SEL_MASK)) + | (IOMUXC_GPR_GPR1_SAI2_MCLK_DIR | IOMUXC_GPR_GPR1_SAI2_MCLK3_SEL(0)); + + // CORE_PIN23_CONFIG = 3; //1:MCLK + // CORE_PIN21_CONFIG = 3; //1:RX_BCLK + // CORE_PIN20_CONFIG = 3; //1:RX_SYNC + CORE_PIN33_CONFIG = 2; //EMC_07, 2=SAI2_MCLK + CORE_PIN4_CONFIG = 2; //EMC_06, 2=SAI2_TX_BCLK + CORE_PIN3_CONFIG = 2; //EMC_05, 2=SAI2_TX_SYNC, page 429 + + int rsync = 1; + int tsync = 0; + + I2S2_TMR = 0; + //I2S2_TCSR = (1<<25); //Reset + I2S2_TCR1 = I2S_TCR1_RFW(1); + I2S2_TCR2 = I2S_TCR2_SYNC(tsync) | I2S_TCR2_BCP // sync=0; tx is async; + | (I2S_TCR2_BCD | I2S_TCR2_DIV((1)) | I2S_TCR2_MSEL(1)); + I2S2_TCR3 = I2S_TCR3_TCE; + I2S2_TCR4 = I2S_TCR4_FRSZ((2-1)) | I2S_TCR4_SYWD((32-1)) | I2S_TCR4_MF + | I2S_TCR4_FSD | I2S_TCR4_FSE | I2S_TCR4_FSP; + I2S2_TCR5 = I2S_TCR5_WNW((32-1)) | I2S_TCR5_W0W((32-1)) | I2S_TCR5_FBT((32-1)); + + I2S2_RMR = 0; + //I2S2_RCSR = (1<<25); //Reset + I2S2_RCR1 = I2S_RCR1_RFW(1); + I2S2_RCR2 = I2S_RCR2_SYNC(rsync) | I2S_RCR2_BCP // sync=0; rx is async; + | (I2S_RCR2_BCD | I2S_RCR2_DIV((1)) | I2S_RCR2_MSEL(1)); + I2S2_RCR3 = I2S_RCR3_RCE; + I2S2_RCR4 = I2S_RCR4_FRSZ((2-1)) | I2S_RCR4_SYWD((32-1)) | I2S_RCR4_MF + | I2S_RCR4_FSE | I2S_RCR4_FSP | I2S_RCR4_FSD; + I2S2_RCR5 = I2S_RCR5_WNW((32-1)) | I2S_RCR5_W0W((32-1)) | I2S_RCR5_FBT((32-1)); + +} + +/******************************************************************/ + +// From Chip: The I2SSlave functionality has NOT been extended to +// allow for different block sizes or sample rates (2020-10-31) + +void AudioOutputI2S2slave_F32::begin(void) +{ + dma.begin(true); // Allocate the DMA channel first + + //pinMode(2, OUTPUT); + block_left_1st = NULL; + block_right_1st = NULL; + + AudioOutputI2S2slave_F32::config_i2s(); + + CORE_PIN2_CONFIG = 2; //1:TX_DATA0 + dma.TCD->SADDR = i2s2_tx_buffer; + dma.TCD->SOFF = 2; + dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1); + dma.TCD->NBYTES_MLNO = 2; + dma.TCD->SLAST = -sizeof(i2s2_tx_buffer); + //dma.TCD->DADDR = (void *)((uint32_t)&I2S1_TDR1 + 2); + dma.TCD->DOFF = 0; + dma.TCD->CITER_ELINKNO = sizeof(i2s2_tx_buffer) / 2; + dma.TCD->DLASTSGA = 0; + dma.TCD->BITER_ELINKNO = sizeof(i2s2_tx_buffer) / 2; + //dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_TX); + dma.TCD->DADDR = (void *)((uint32_t)&I2S2_TDR0 + 2); + dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR; + dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_TX); + dma.enable(); + + // I2S2_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE; + // I2S2_TCSR = I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE; + I2S2_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE | I2S_TCSR_FR; + + update_responsibility = update_setup(); + //dma.enable(); + dma.attachInterrupt(AudioOutputI2S2_F32::isr); +} + + + void AudioOutputI2S2slave_F32::config_i2s(void) +{ + + CCM_CCGR5 |= CCM_CCGR5_SAI2(CCM_CCGR_ON); + + // if either transmitter or receiver is enabled, do nothing + if (I2S2_TCSR & I2S_TCSR_TE) return; + if (I2S2_RCSR & I2S_RCSR_RE) return; + + // not using MCLK in slave mode - hope that's ok? + // //CORE_PIN23_CONFIG = 3; // AD_B1_09 ALT3=SAI1_MCLK + // CORE_PIN21_CONFIG = 3; // AD_B1_11 ALT3=SAI1_RX_BCLK + // CORE_PIN20_CONFIG = 3; // AD_B1_10 ALT3=SAI1_RX_SYNC + CORE_PIN4_CONFIG = 2; //2:TX_BCLK + CORE_PIN3_CONFIG = 2; //2:TX_SYNC + IOMUXC_SAI2_RX_BCLK_SELECT_INPUT = 0; //page 422 bitclock IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_06 + IOMUXC_SAI2_RX_SYNC_SELECT_INPUT = 0; //IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_05 + + int rsync = 1; + int tsync = 0; + // uint32_t noBits = 32; + // uint32_t noBitsM1=noBits-1; + + // configure transmitter + I2S2_TMR = 0; + I2S2_TCR1 = I2S_TCR1_RFW(1); // watermark at half fifo size + I2S2_TCR2 = I2S_TCR2_SYNC(tsync) | I2S_TCR2_BCP; + I2S2_TCR3 = I2S_TCR3_TCE; + I2S2_TCR4 = I2S_TCR4_FRSZ(1) | I2S_TCR4_SYWD(31) | I2S_TCR4_MF + | I2S_TCR4_FSE | I2S_TCR4_FSP; + I2S2_TCR5 = I2S_TCR5_WNW(31) | I2S_TCR5_W0W(31) | I2S_TCR5_FBT(31); + + // configure receiver + I2S2_RMR = 0; + I2S2_RCR1 = I2S_RCR1_RFW(1); + I2S2_RCR2 = I2S_RCR2_SYNC(rsync) | I2S_TCR2_BCP; + I2S2_RCR3 = I2S_RCR3_RCE; + I2S2_RCR4 = I2S_RCR4_FRSZ(1) | I2S_RCR4_SYWD(31) | I2S_RCR4_MF + | I2S_RCR4_FSE | I2S_RCR4_FSP; + I2S2_RCR5 = I2S_RCR5_WNW(31) | I2S_RCR5_W0W(31) | I2S_RCR5_FBT(31); + +} diff --git a/output_i2s2_f32.h b/output_i2s2_f32.h new file mode 100644 index 0000000..d8a700c --- /dev/null +++ b/output_i2s2_f32.h @@ -0,0 +1,118 @@ +/* + * ***** output_i2s_f32.h ***** + * + * 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. + */ + /* + * 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 old commented out code. RSL 30 May 2022 + +#ifndef output_i2s2_f32_h_ +#define output_i2s2_f32_h_ + +#include +#include +#include "AudioStream_F32.h" +#include "DMAChannel.h" + +class AudioOutputI2S2_F32 : public AudioStream_F32 +{ +//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node +public: + //uses default AUDIO_SAMPLE_RATE and BLOCK_SIZE_SAMPLES from AudioStream.h: + AudioOutputI2S2_F32(void) : AudioStream_F32(2, inputQueueArray) { begin();} + // Allow variable sample rate and block size: + AudioOutputI2S2_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray) + { + sample_rate_Hz = settings.sample_rate_Hz; + audio_block_samples = settings.audio_block_samples; + begin(); + } + + // outputScale is a gain control for both left and right. If set exactly + // to 1.0f it is left as a pass-through. + void setGain(float _oscale) { + outputScale = _oscale; + } + virtual void update(void); + void begin(void); + void begin(bool); + friend class AudioInputI2S_F32; + friend class AudioInputI2S_F32; + #if defined(__IMXRT1062__) + friend class AudioOutputI2SQuad_F32; + friend class AudioInputI2SQuad_F32; + //friend class AudioOutputI2SHex; + //friend class AudioInputI2SHex; + //friend class AudioOutputI2SOct; + //friend class AudioInputI2SOct; + #endif + + static void scale_f32_to_i16( float32_t *p_f32, float32_t *p_i16, int len) ; + static void scale_f32_to_i24( float32_t *p_f32, float32_t *p_i16, int len) ; + static void scale_f32_to_i32( float32_t *p_f32, float32_t *p_i32, int len) ; + + static float setI2SFreq_T3(const float); // I2S clock for T3,x +protected: + AudioOutputI2S2_F32(int dummy): AudioStream_F32(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !! + static void config_i2s(void); + static void config_i2s(bool); + static void config_i2s(float); + static void config_i2s(bool, float); + static audio_block_f32_t *block_left_1st; + static audio_block_f32_t *block_right_1st; + static bool update_responsibility; + static DMAChannel dma; + static void isr_16(void); + static void isr_32(void); + static void isr(void); +private: + static audio_block_f32_t *block_left_2nd; + static audio_block_f32_t *block_right_2nd; + static uint16_t block_left_offset; + static uint16_t block_right_offset; + audio_block_f32_t *inputQueueArray[2]; + static float sample_rate_Hz; + static int audio_block_samples; + volatile uint8_t enabled = 1; + float outputScale = 1.0f; // Quick volume control +}; + +class AudioOutputI2S2slave_F32 : public AudioOutputI2S2_F32 +{ +public: + AudioOutputI2S2slave_F32(void) : AudioOutputI2S2_F32(0) { begin(); } ; + void begin(void); + friend class AudioInputI2Sslave_F32; + friend void dma_ch0_isr(void); +protected: + static void config_i2s(void); +}; +#endif