File content as of revision 12:61e2c3cc79a3:

//------------------------------------------------------------------------------
//  Overwrite functuions and define calback function
//  for functions in stm32746g_discovery_audio.cpp
//
//  Original version: BSP_overwrite.cpp by Nanase
//      https://developer.mbed.org/users/nanase/code/DISCO-F746NG_Oscilloscope/
//------------------------------------------------------------------------------

#include "BSP_AudioIn_Overwrite.hpp"

// These three callback functions are modyfied by Mikami
void BSP_AUDIO_IN_HalfTransfer_CallBack()
{
    Mikami::SaiIO::Captured1st();
}

void BSP_AUDIO_IN_TransferComplete_CallBack()
{
    Mikami::SaiIO::Captured2nd();
}

void BSP_AUDIO_IN_Error_CallBack()
{
    Mikami::SaiIO::ErrorTrap();
}

//--------------------------------------------------------------
//  Followings are original by Nanase
//--------------------------------------------------------------

DMA_HandleTypeDef hdma_sai_rx;

void AUDIO_IN_SAIx_DMAx_IRQHandler()
{
    HAL_DMA_IRQHandler(&hdma_sai_rx);
}

void  BSP_AUDIO_IN_MspInit(SAI_HandleTypeDef *hsai, void *Params)
{
    GPIO_InitTypeDef  gpio_init_structure;

    /* Enable SAI clock */
    AUDIO_IN_SAIx_CLK_ENABLE();

    /* Enable SD GPIO clock */
    AUDIO_IN_SAIx_SD_ENABLE();
    /* CODEC_SAI pin configuration: SD pin */
    gpio_init_structure.Pin = AUDIO_IN_SAIx_SD_PIN;
    gpio_init_structure.Mode = GPIO_MODE_AF_PP;
    gpio_init_structure.Pull = GPIO_NOPULL;
    gpio_init_structure.Speed = GPIO_SPEED_FAST;
    gpio_init_structure.Alternate = AUDIO_IN_SAIx_SD_AF;
    HAL_GPIO_Init(AUDIO_IN_SAIx_SD_GPIO_PORT, &gpio_init_structure);

    /* Enable Audio INT GPIO clock */
    AUDIO_IN_INT_GPIO_ENABLE();
    /* Audio INT pin configuration: input */
    gpio_init_structure.Pin = AUDIO_IN_INT_GPIO_PIN;
    gpio_init_structure.Mode = GPIO_MODE_INPUT;
    gpio_init_structure.Pull = GPIO_NOPULL;
    gpio_init_structure.Speed = GPIO_SPEED_FAST;
    HAL_GPIO_Init(AUDIO_IN_INT_GPIO_PORT, &gpio_init_structure);

    /* Enable the DMA clock */
    AUDIO_IN_SAIx_DMAx_CLK_ENABLE();

    if(hsai->Instance == AUDIO_IN_SAIx)
    {
        /* Configure the hdma_sai_rx handle parameters */
        hdma_sai_rx.Init.Channel             = AUDIO_IN_SAIx_DMAx_CHANNEL;
        hdma_sai_rx.Init.Direction           = DMA_PERIPH_TO_MEMORY;
        hdma_sai_rx.Init.PeriphInc           = DMA_PINC_DISABLE;
        hdma_sai_rx.Init.MemInc              = DMA_MINC_ENABLE;
        hdma_sai_rx.Init.PeriphDataAlignment = AUDIO_IN_SAIx_DMAx_PERIPH_DATA_SIZE;
        hdma_sai_rx.Init.MemDataAlignment    = AUDIO_IN_SAIx_DMAx_MEM_DATA_SIZE;
        hdma_sai_rx.Init.Mode                = DMA_CIRCULAR;
        hdma_sai_rx.Init.Priority            = DMA_PRIORITY_HIGH;
        hdma_sai_rx.Init.FIFOMode            = DMA_FIFOMODE_DISABLE;
        hdma_sai_rx.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
        hdma_sai_rx.Init.MemBurst            = DMA_MBURST_SINGLE;
        hdma_sai_rx.Init.PeriphBurst         = DMA_MBURST_SINGLE;

        hdma_sai_rx.Instance = AUDIO_IN_SAIx_DMAx_STREAM;

        /* Associate the DMA handle */
        __HAL_LINKDMA(hsai, hdmarx, hdma_sai_rx);

        /* Deinitialize the Stream for new transfer */
        HAL_DMA_DeInit(&hdma_sai_rx);

        /* Configure the DMA Stream */
        HAL_DMA_Init(&hdma_sai_rx);
    }

    /* SAI DMA IRQ Channel configuration */
    HAL_NVIC_SetPriority(AUDIO_IN_SAIx_DMAx_IRQ, AUDIO_IN_IRQ_PREPRIO, 0);
    HAL_NVIC_EnableIRQ(AUDIO_IN_SAIx_DMAx_IRQ);

    /* Audio INT IRQ Channel configuration */
    HAL_NVIC_SetPriority(AUDIO_IN_INT_IRQ, AUDIO_IN_IRQ_PREPRIO, 0);
    HAL_NVIC_EnableIRQ(AUDIO_IN_INT_IRQ);
}