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-
-
-
-
- #if defined(__IMXRT1052__) || defined(__IMXRT1062__)
- #include <Arduino.h>
- #include "output_pt8211_2.h"
- #include "memcpy_audio.h"
- #include "utility/imxrt_hw.h"
-
- audio_block_t * AudioOutputPT8211_2::block_left_1st = NULL;
- audio_block_t * AudioOutputPT8211_2::block_right_1st = NULL;
- audio_block_t * AudioOutputPT8211_2::block_left_2nd = NULL;
- audio_block_t * AudioOutputPT8211_2::block_right_2nd = NULL;
- uint16_t AudioOutputPT8211_2::block_left_offset = 0;
- uint16_t AudioOutputPT8211_2::block_right_offset = 0;
- bool AudioOutputPT8211_2::update_responsibility = false;
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- DMAMEM __attribute__((aligned(32))) static uint32_t i2s_tx_buffer[AUDIO_BLOCK_SAMPLES*4];
- #else
- DMAMEM __attribute__((aligned(32))) static uint32_t i2s_tx_buffer[AUDIO_BLOCK_SAMPLES];
- #endif
- DMAChannel AudioOutputPT8211_2::dma(false);
-
- FLASHMEM
- void AudioOutputPT8211_2::begin(void)
- {
- memset(i2s_tx_buffer, 0, sizeof(i2s_tx_buffer));
- arm_dcache_flush_delete(i2s_tx_buffer, sizeof(i2s_tx_buffer));
- dma.begin(true);
-
- block_left_1st = NULL;
- block_right_1st = NULL;
-
-
- config_i2s();
- CORE_PIN2_CONFIG = 2;
-
- 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_MLNO = 2;
- dma.TCD->SLAST = -sizeof(i2s_tx_buffer);
- dma.TCD->DOFF = 0;
- dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2;
- dma.TCD->DLASTSGA = 0;
- dma.TCD->BITER_ELINKNO = sizeof(i2s_tx_buffer) / 2;
- dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
- dma.TCD->DADDR = (void *)((uint32_t)&I2S2_TDR0);
- dma.triggerAtHardwareEvent(DMAMUX_SOURCE_SAI2_TX);
-
- I2S2_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE;
-
- update_responsibility = update_setup();
- dma.attachInterrupt(isr);
- dma.enable();
- }
-
- void AudioOutputPT8211_2::isr(void)
- {
- int16_t *dest, *dest_copy;
- audio_block_t *blockL, *blockR;
- uint32_t saddr, offsetL, offsetR;
-
- saddr = (uint32_t)(dma.TCD->SADDR);
- dma.clearInterrupt();
- if (saddr < (uint32_t)i2s_tx_buffer + sizeof(i2s_tx_buffer) / 2) {
-
-
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- dest = (int16_t *)&i2s_tx_buffer[(AUDIO_BLOCK_SAMPLES/2)*4];
- #else
- dest = (int16_t *)&i2s_tx_buffer[AUDIO_BLOCK_SAMPLES/2];
- #endif
- if (AudioOutputPT8211_2::update_responsibility) AudioStream::update_all();
- } else {
-
-
- dest = (int16_t *)i2s_tx_buffer;
- }
- dest_copy = dest;
-
- blockL = AudioOutputPT8211_2::block_left_1st;
- blockR = AudioOutputPT8211_2::block_right_1st;
- offsetL = AudioOutputPT8211_2::block_left_offset;
- offsetR = AudioOutputPT8211_2::block_right_offset;
-
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- static int32_t oldL = 0;
- static int32_t oldR = 0;
- #endif
- if (blockL && blockR) {
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- #if defined(AUDIO_PT8211_INTERPOLATION_LINEAR)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetL++, offsetR++) {
- int32_t valL = blockL->data[offsetL];
- int32_t valR = blockR->data[offsetR];
- int32_t nL = (oldL+valL) >> 1;
- int32_t nR = (oldR+valR) >> 1;
- *(dest+0) = (oldL+nL) >> 1;
- *(dest+1) = (oldR+nR) >> 1;
- *(dest+2) = nL;
- *(dest+3) = nR;
- *(dest+4) = (nL+valL) >> 1;
- *(dest+5) = (nR+valR) >> 1;
- *(dest+6) = valL;
- *(dest+7) = valR;
- dest+=8;
- oldL = valL;
- oldR = valR;
- }
- #elif defined(AUDIO_PT8211_INTERPOLATION_CIC)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetL++, offsetR++) {
- int32_t valL = blockL->data[offsetL];
- int32_t valR = blockR->data[offsetR];
-
- int32_t combL[3] = {0};
- static int32_t combLOld[2] = {0};
- int32_t combR[3] = {0};
- static int32_t combROld[2] = {0};
-
- combL[0] = valL - oldL;
- combR[0] = valR - oldR;
- combL[1] = combL[0] - combLOld[0];
- combR[1] = combR[0] - combROld[0];
- combL[2] = combL[1] - combLOld[1];
- combR[2] = combR[1] - combROld[1];
-
-
- oldL = valL;
- oldR = valR;
- combLOld[0] = combL[0];
- combROld[0] = combR[0];
- combLOld[1] = combL[1];
- combROld[1] = combR[1];
- for (int j = 0; j < 4; j++) {
- int32_t integrateL[3];
- int32_t integrateR[3];
- static int32_t integrateLOld[3] = {0};
- static int32_t integrateROld[3] = {0};
- integrateL[0] = ( (j==0) ? (combL[2]) : (0) ) + integrateLOld[0];
- integrateR[0] = ( (j==0) ? (combR[2]) : (0) ) + integrateROld[0];
- integrateL[1] = integrateL[0] + integrateLOld[1];
- integrateR[1] = integrateR[0] + integrateROld[1];
- integrateL[2] = integrateL[1] + integrateLOld[2];
- integrateR[2] = integrateR[1] + integrateROld[2];
-
-
- *(dest+j*2) = integrateL[2] >> 4;
- *(dest+j*2+1) = integrateR[2] >> 4;
- integrateLOld[0] = integrateL[0];
- integrateROld[0] = integrateR[0];
- integrateLOld[1] = integrateL[1];
- integrateROld[1] = integrateR[1];
- integrateLOld[2] = integrateL[2];
- integrateROld[2] = integrateR[2];
- }
- dest+=8;
- }
- #else
- #error no interpolation method defined for oversampling.
- #endif
- #else
- memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR);
- offsetL += AUDIO_BLOCK_SAMPLES / 2;
- offsetR += AUDIO_BLOCK_SAMPLES / 2;
- #endif
-
- } else if (blockL) {
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- #if defined(AUDIO_PT8211_INTERPOLATION_LINEAR)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetL++) {
- int32_t val = blockL->data[offsetL];
- int32_t n = (oldL+val) >> 1;
- *(dest+0) = (oldL+n) >> 1;
- *(dest+1) = 0;
- *(dest+2) = n;
- *(dest+3) = 0;
- *(dest+4) = (n+val) >> 1;
- *(dest+5) = 0;
- *(dest+6) = val;
- *(dest+7) = 0;
- dest+=8;
- oldL = val;
- }
- #elif defined(AUDIO_PT8211_INTERPOLATION_CIC)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetL++) {
- int32_t valL = blockL->data[offsetL];
-
- int32_t combL[3] = {0};
- static int32_t combLOld[2] = {0};
-
- combL[0] = valL - oldL;
- combL[1] = combL[0] - combLOld[0];
- combL[2] = combL[1] - combLOld[1];
-
- combLOld[0] = combL[0];
- combLOld[1] = combL[1];
-
- for (int j = 0; j < 4; j++) {
- int32_t integrateL[3];
- static int32_t integrateLOld[3] = {0};
- integrateL[0] = ( (j==0) ? (combL[2]) : (0) ) + integrateLOld[0];
- integrateL[1] = integrateL[0] + integrateLOld[1];
- integrateL[2] = integrateL[1] + integrateLOld[2];
-
- *(dest+j*2) = integrateL[2] >> 4;
- integrateLOld[0] = integrateL[0];
- integrateLOld[1] = integrateL[1];
- integrateLOld[2] = integrateL[2];
- }
-
-
- *(dest+1) = 0;
- *(dest+3) = 0;
- *(dest+5) = 0;
- *(dest+7) = 0;
- dest+=8;
- oldL = valL;
- }
- #else
- #error no interpolation method defined for oversampling.
- #endif
- #else
- memcpy_tointerleaveL(dest, blockL->data + offsetL);
- offsetL += (AUDIO_BLOCK_SAMPLES / 2);
- #endif
- } else if (blockR) {
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- #if defined(AUDIO_PT8211_INTERPOLATION_LINEAR)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetR++) {
- int32_t val = blockR->data[offsetR];
- int32_t n = (oldR+val) >> 1;
- *(dest+0) = 0;
- *(dest+1) = ((oldR+n) >> 1);
- *(dest+2) = 0;
- *(dest+3) = n;
- *(dest+4) = 0;
- *(dest+5) = ((n+val) >> 1);
- *(dest+6) = 0;
- *(dest+7) = val;
- dest+=8;
- oldR = val;
- }
- #elif defined(AUDIO_PT8211_INTERPOLATION_CIC)
- for (int i=0; i< AUDIO_BLOCK_SAMPLES / 2; i++, offsetR++) {
- int32_t valR = blockR->data[offsetR];
-
- int32_t combR[3] = {0};
- static int32_t combROld[2] = {0};
-
- combR[0] = valR - oldR;
- combR[1] = combR[0] - combROld[0];
- combR[2] = combR[1] - combROld[1];
-
- combROld[0] = combR[0];
- combROld[1] = combR[1];
-
- for (int j = 0; j < 4; j++) {
- int32_t integrateR[3];
- static int32_t integrateROld[3] = {0};
- integrateR[0] = ( (j==0) ? (combR[2]) : (0) ) + integrateROld[0];
- integrateR[1] = integrateR[0] + integrateROld[1];
- integrateR[2] = integrateR[1] + integrateROld[2];
-
- *(dest+j*2+1) = integrateR[2] >> 4;
- integrateROld[0] = integrateR[0];
- integrateROld[1] = integrateR[1];
- integrateROld[2] = integrateR[2];
- }
-
-
- *(dest+0) = 0;
- *(dest+2) = 0;
- *(dest+4) = 0;
- *(dest+6) = 0;
- dest+=8;
- oldR = valR;
- }
- #else
- #error no interpolation method defined for oversampling.
- #endif
- #else
- memcpy_tointerleaveR(dest, blockR->data + offsetR);
- offsetR += AUDIO_BLOCK_SAMPLES / 2;
- #endif
- } else {
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- memset(dest,0,AUDIO_BLOCK_SAMPLES*8);
- #else
- memset(dest,0,AUDIO_BLOCK_SAMPLES*2);
- #endif
- return;
- }
-
- arm_dcache_flush_delete(dest_copy, sizeof(i2s_tx_buffer) / 2);
-
- if (offsetL < AUDIO_BLOCK_SAMPLES) {
- AudioOutputPT8211_2::block_left_offset = offsetL;
- } else {
- AudioOutputPT8211_2::block_left_offset = 0;
- AudioStream::release(blockL);
- AudioOutputPT8211_2::block_left_1st = AudioOutputPT8211_2::block_left_2nd;
- AudioOutputPT8211_2::block_left_2nd = NULL;
- }
- if (offsetR < AUDIO_BLOCK_SAMPLES) {
- AudioOutputPT8211_2::block_right_offset = offsetR;
- } else {
- AudioOutputPT8211_2::block_right_offset = 0;
- AudioStream::release(blockR);
- AudioOutputPT8211_2::block_right_1st = AudioOutputPT8211_2::block_right_2nd;
- AudioOutputPT8211_2::block_right_2nd = NULL;
- }
- }
-
-
-
- void AudioOutputPT8211_2::update(void)
- {
-
- audio_block_t *block;
- block = receiveReadOnly(0);
- if (block) {
- __disable_irq();
- if (block_left_1st == NULL) {
- block_left_1st = block;
- block_left_offset = 0;
- __enable_irq();
- } else if (block_left_2nd == NULL) {
- block_left_2nd = block;
- __enable_irq();
- } else {
- audio_block_t *tmp = block_left_1st;
- block_left_1st = block_left_2nd;
- block_left_2nd = block;
- block_left_offset = 0;
- __enable_irq();
- release(tmp);
- }
- }
- block = receiveReadOnly(1);
- if (block) {
- __disable_irq();
- if (block_right_1st == NULL) {
- block_right_1st = block;
- block_right_offset = 0;
- __enable_irq();
- } else if (block_right_2nd == NULL) {
- block_right_2nd = block;
- __enable_irq();
- } else {
- audio_block_t *tmp = block_right_1st;
- block_right_1st = block_right_2nd;
- block_right_2nd = block;
- block_right_offset = 0;
- __enable_irq();
- release(tmp);
- }
- }
- }
-
- FLASHMEM
- void AudioOutputPT8211_2::config_i2s(void)
- {
-
- CCM_CCGR5 |= CCM_CCGR5_SAI2(CCM_CCGR_ON);
-
- int fs = AUDIO_SAMPLE_RATE_EXACT;
-
- int n1 = 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);
-
- 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)
- | CCM_CS2CDR_SAI2_CLK_PODF(n2-1);
- 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));
-
- if (I2S2_TCSR & I2S_TCSR_TE) return;
-
-
- CORE_PIN4_CONFIG = 2;
- CORE_PIN3_CONFIG = 2;
-
- #if defined(AUDIO_PT8211_OVERSAMPLING)
- int div = 0;
- #else
- int div = 3;
- #endif
-
- I2S2_TMR = 0;
- I2S2_TCR1 = I2S_TCR1_RFW(0);
- I2S2_TCR2 = I2S_TCR2_SYNC(0) | I2S_TCR2_BCP | I2S_TCR2_MSEL(1) | I2S_TCR2_BCD | I2S_TCR2_DIV(div);
- I2S2_TCR3 = I2S_TCR3_TCE;
-
- I2S2_TCR4 = I2S_TCR4_FRSZ(1) | I2S_TCR4_SYWD(15) | I2S_TCR4_MF | I2S_TCR4_FSP | I2S_TCR4_FSD;
- I2S2_TCR5 = I2S_TCR5_WNW(15) | I2S_TCR5_W0W(15) | I2S_TCR5_FBT(15);
-
- }
- #endif
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