MCUXpresso_LPC55S69/boards/lpcxpresso55s69/audio_examples/maestro_playback/cm33_core0/streamer_pcm.c

/*
 * Copyright 2021 NXP
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include "osa_common.h"

#include "app_definitions.h"
#include "board.h"
#include "streamer_pcm_app.h"
#include "fsl_debug_console.h"
#include "fsl_codec_common.h"
#include "eap_att.h"

pcm_rtos_t pcmHandle = {0};

extern codec_handle_t codecHandle;

static void TxCallback(I2S_Type *base, i2s_dma_handle_t *handle, status_t completionStatus, void *userData)
{
    pcm_rtos_t *pcm = (pcm_rtos_t *)userData;
    BaseType_t reschedule;
    xSemaphoreGiveFromISR(pcm->semaphoreTX, &reschedule);
    portYIELD_FROM_ISR(reschedule);
}

void streamer_pcm_init(void)
{
    DMA_Init(DEMO_DMA);

    DMA_EnableChannel(DEMO_DMA, DEMO_I2S_TX_CHANNEL);
    DMA_SetChannelPriority(DEMO_DMA, DEMO_I2S_TX_CHANNEL, kDMA_ChannelPriority3);
    DMA_CreateHandle(&pcmHandle.i2sTxDmaHandle, DEMO_DMA, DEMO_I2S_TX_CHANNEL);

    /* Dummy I2S TX init for the  EAP */
    I2S_TxGetDefaultConfig(&pcmHandle.tx_config);
    I2S_TxInit(DEMO_I2S_TX, &pcmHandle.tx_config);
}

pcm_rtos_t *streamer_pcm_open(uint32_t num_buffers)
{
    pcmHandle.semaphoreTX = xSemaphoreCreateBinary();
    return &pcmHandle;
}

pcm_rtos_t *streamer_pcm_rx_open(uint32_t num_buffers)
{
    return 0;
}

void streamer_pcm_start(pcm_rtos_t *pcm)
{
    /* Interrupts already enabled - nothing to do.
     * App/streamer can begin writing data to SAI. */
}

void streamer_pcm_close(pcm_rtos_t *pcm)
{
    /* Stop playback.  This will flush the SAI transmit buffers. */
    if (pcm->i2sTxHandle.state != 0)
    {
        I2S_TransferAbortDMA(DEMO_I2S_TX, &pcm->i2sTxHandle);
    }
    vSemaphoreDelete(pcmHandle.semaphoreTX);
}

void streamer_pcm_rx_close(pcm_rtos_t *pcm)
{
}

int streamer_pcm_write(pcm_rtos_t *pcm, uint8_t *data, uint32_t size)
{
    /* Ensure write size is a multiple of 32, otherwise EDMA will assert
     * failure.  Round down for the last chunk of a file/stream. */
    pcm->i2sTxTransfer.dataSize = size - (size % 32);
    pcm->i2sTxTransfer.data     = data;

    if (pcm->isFirstTx)
    {
        /* need to queue two transmit buffers so when the first one
         * finishes transfer, the other immediatelly starts */
        I2S_TxTransferSendDMA(DEMO_I2S_TX, &pcm->i2sTxHandle, pcm->i2sTxTransfer);
        I2S_TxTransferSendDMA(DEMO_I2S_TX, &pcm->i2sTxHandle, pcm->i2sTxTransfer);
        pcm->isFirstTx = 0;
    }
    else
    {
        /* Wait for the previous transfer to finish */
        if (xSemaphoreTake(pcm->semaphoreTX, portMAX_DELAY) != pdTRUE)
            return -1;

        I2S_TxTransferSendDMA(DEMO_I2S_TX, &pcm->i2sTxHandle, pcm->i2sTxTransfer);
        I2S_TxTransferSendDMA(DEMO_I2S_TX, &pcm->i2sTxHandle, pcm->i2sTxTransfer);
    }

    return 0;
}

int streamer_pcm_read(pcm_rtos_t *pcm, uint8_t *data, uint32_t size)
{
    return 0;
}

int streamer_pcm_setparams(
    pcm_rtos_t *pcm, uint32_t sample_rate, uint32_t bit_width, uint8_t num_channels, bool tx, bool dummy_tx, int volume)
{
    int ret     = 0;
    int divider = 0;

    pcm->isFirstTx    = tx ? 1U : pcm->isFirstTx;
    pcm->sample_rate  = sample_rate;
    pcm->bit_width    = bit_width;
    pcm->num_channels = num_channels;
    pcm->dummy_tx_enable |= dummy_tx;

    if (sample_rate % 8000 == 0 || sample_rate % 6000 == 0)
    {
        const pll_setup_t pll0Setup = {
            .pllctrl = SYSCON_PLL0CTRL_CLKEN_MASK | SYSCON_PLL0CTRL_SELI(2U) | SYSCON_PLL0CTRL_SELP(31U),
            .pllndec = SYSCON_PLL0NDEC_NDIV(125U),
            .pllpdec = SYSCON_PLL0PDEC_PDIV(8U),
            .pllsscg = {0x0U, (SYSCON_PLL0SSCG1_MDIV_EXT(3072U) | SYSCON_PLL0SSCG1_SEL_EXT_MASK)},
            .pllRate = 24576000U,
            .flags   = PLL_SETUPFLAG_WAITLOCK};
        /*!< Configure PLL to the desired values */
        CLOCK_SetPLL0Freq(&pll0Setup);
    }
    else if (sample_rate % 11025 == 0)
    {
        const pll_setup_t pll0Setup = {
            .pllctrl = SYSCON_PLL0CTRL_CLKEN_MASK | SYSCON_PLL0CTRL_SELI(2U) | SYSCON_PLL0CTRL_SELP(31U),
            .pllndec = SYSCON_PLL0NDEC_NDIV(202U),
            .pllpdec = SYSCON_PLL0PDEC_PDIV(8U),
            .pllsscg = {0x0U, (SYSCON_PLL0SSCG1_MDIV_EXT(4561U) | SYSCON_PLL0SSCG1_SEL_EXT_MASK)},
            .pllRate = 22579200U,
            .flags   = PLL_SETUPFLAG_WAITLOCK};
        CLOCK_SetPLL0Freq(&pll0Setup); /*!< Configure PLL0 to the desired values */
    }

    divider = (CLOCK_GetPll0OutFreq() / sample_rate / bit_width / DEMO_CHANNEL_NUM);

    /*
     * masterSlave = kI2S_MasterSlaveNormalMaster;
     * mode = kI2S_ModeI2sClassic;
     * rightLow = false;
     * leftJust = false;
     * pdmData = false;
     * sckPol = false;
     * wsPol = false;
     * divider = 1;
     * oneChannel = false;
     * dataLength = 16;
     * frameLength = 32;
     * position = 0;
     * watermark = 4;
     * txEmptyZero = true;
     * pack48 = false;
     */
    I2S_TxGetDefaultConfig(&pcmHandle.tx_config);
    pcmHandle.tx_config.divider     = divider;
    pcmHandle.tx_config.masterSlave = DEMO_I2S_TX_MODE;
    pcmHandle.tx_config.oneChannel  = (pcm->num_channels == 1);
    I2S_TxInit(DEMO_I2S_TX, &pcmHandle.tx_config);
    I2S_TxTransferCreateHandleDMA(DEMO_I2S_TX, &pcmHandle.i2sTxHandle, &pcmHandle.i2sTxDmaHandle, TxCallback,
                                  (void *)&pcmHandle);

    ret = streamer_pcm_set_volume(pcm, 0);
    if (ret != kStatus_Success)
    {
        return 1;
    }

    ret = CODEC_SetFormat(&codecHandle, CLOCK_GetPll0OutFreq() / 2, sample_rate, bit_width);
    if (ret != kStatus_Success)
    {
        return 1;
    }

    ret = streamer_pcm_set_volume(pcm, volume);
    if (ret != kStatus_Success)
    {
        return 1;
    }

    return 0;
}

void streamer_pcm_getparams(pcm_rtos_t *pcm, uint32_t *sample_rate, uint32_t *bit_width, uint8_t *num_channels)
{
    *sample_rate  = pcm->sample_rate;
    *bit_width    = pcm->bit_width;
    *num_channels = pcm->num_channels;
}

int streamer_pcm_mute(pcm_rtos_t *pcm, bool mute)
{
    status_t ret;

    ret = CODEC_SetMute(&codecHandle, kCODEC_PlayChannelHeadphoneLeft | kCODEC_PlayChannelHeadphoneRight, mute);
    if (ret != kStatus_Success)
    {
        return 1;
    }

    return 0;
}

int streamer_pcm_set_volume(pcm_rtos_t *pcm, int volume)
{
    int channel;

    channel = (pcm->num_channels == 1) ? kCODEC_PlayChannelHeadphoneLeft :
                                         kCODEC_PlayChannelHeadphoneLeft | kCODEC_PlayChannelHeadphoneRight;

    if (volume <= 0)
        CODEC_SetMute(&codecHandle, kCODEC_PlayChannelHeadphoneRight | kCODEC_PlayChannelHeadphoneLeft, true);
    else
        CODEC_SetVolume(&codecHandle, channel, volume > CODEC_VOLUME_MAX_VALUE ? CODEC_VOLUME_MAX_VALUE : volume);

    return 0;
}