I2S Full Duplex Mode + DMA + HAL_Cube library

officialkesh · ‎2016-11-30

Posted on November 30, 2016 at 09:12

Hello,

In our application for audio codec IC, we have used I2S in full duplex mode with DMA.

I have copied code for I2S . Can anyone suggest me what could be wrong with this ?

static void I2SInit()

{

// Enable PLLI2S

__HAL_RCC_PLLI2S_ENABLE();

// DMA controller clock enable

__HAL_RCC_DMA1_CLK_ENABLE();

// DMA1_Stream0_IRQn interrupt configuration

HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);

// DMA1_Stream7_IRQn interrupt configuration

HAL_NVIC_SetPriority(DMA1_Stream7_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(DMA1_Stream7_IRQn);

hi2s3.Instance = SPI3;

hi2s3.Init.Mode = I2S_MODE_MASTER_TX;

hi2s3.Init.Standard = I2S_STANDARD_PHILIPS;

hi2s3.Init.DataFormat = I2S_DATAFORMAT_16B;

hi2s3.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;

hi2s3.Init.AudioFreq = I2S_AUDIOFREQ_8K;

hi2s3.Init.CPOL = I2S_CPOL_LOW;

hi2s3.Init.ClockSource = I2S_CLOCK_PLL;

hi2s3.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE;

if (HAL_I2S_Init(&hi2s3) != HAL_OK)

while(1);

}

void HAL_I2S_MspInit(I2S_HandleTypeDef* hi2s)

{

GPIO_InitTypeDef gpio;

if(hi2s->Instance == SPI3)

{

// Peripheral clock enable

__HAL_RCC_SPI3_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE();

__HAL_RCC_GPIOC_CLK_ENABLE();

/**I2S3 GPIO Configuration

PA15 ------> I2S3_WS

PC10 ------> I2S3_CK

PC11 ------> I2S3_ext_SD

PC12 ------> I2S3_SD

*/

gpio.Pin = GPIO_PIN_15;

gpio.Mode = GPIO_MODE_AF_PP;

gpio.Pull = GPIO_NOPULL;

gpio.Speed = GPIO_SPEED_FREQ_LOW;

gpio.Alternate = GPIO_AF6_SPI3;

HAL_GPIO_Init(GPIOA, &gpio);

gpio.Pin = GPIO_PIN_10|GPIO_PIN_12;

gpio.Mode = GPIO_MODE_AF_PP;

gpio.Pull = GPIO_NOPULL;

gpio.Speed = GPIO_SPEED_FREQ_LOW;

gpio.Alternate = GPIO_AF6_SPI3;

HAL_GPIO_Init(GPIOC, &gpio);

gpio.Pin = GPIO_PIN_11;

gpio.Mode = GPIO_MODE_AF_PP;

gpio.Pull = GPIO_NOPULL;

gpio.Speed = GPIO_SPEED_FREQ_LOW;

gpio.Alternate = GPIO_AF5_I2S3ext;

HAL_GPIO_Init(GPIOC, &gpio);

// Peripheral DMA init

hdma_spi3_tx.Instance = DMA1_Stream7;

hdma_spi3_tx.Init.Channel = DMA_CHANNEL_0;

hdma_spi3_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;

hdma_spi3_tx.Init.PeriphInc = DMA_PINC_DISABLE;

hdma_spi3_tx.Init.MemInc = DMA_MINC_ENABLE;

hdma_spi3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;

hdma_spi3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;

hdma_spi3_tx.Init.Mode = DMA_CIRCULAR;

hdma_spi3_tx.Init.Priority = DMA_PRIORITY_LOW;

hdma_spi3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;

if (HAL_DMA_Init(&hdma_spi3_tx) != HAL_OK)

while(1);

__HAL_LINKDMA(hi2s,hdmatx,hdma_spi3_tx);

hdma_i2s3_ext_rx.Instance = DMA1_Stream0;

hdma_i2s3_ext_rx.Init.Channel = DMA_CHANNEL_3;

hdma_i2s3_ext_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;

hdma_i2s3_ext_rx.Init.PeriphInc = DMA_PINC_DISABLE;

hdma_i2s3_ext_rx.Init.MemInc = DMA_MINC_ENABLE;

hdma_i2s3_ext_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;

hdma_i2s3_ext_rx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;

hdma_i2s3_ext_rx.Init.Mode = DMA_CIRCULAR;

hdma_i2s3_ext_rx.Init.Priority = DMA_PRIORITY_LOW;

hdma_i2s3_ext_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;

if (HAL_DMA_Init(&hdma_i2s3_ext_rx) != HAL_OK)

while(1);

__HAL_LINKDMA(hi2s,hdmarx,hdma_i2s3_ext_rx);

}

void DMA1_Stream0_IRQHandler(void)

{

HAL_DMA_IRQHandler(&hdma_i2s3_ext_rx);

}

void DMA1_Stream7_IRQHandler(void)

{

HAL_DMA_IRQHandler(&hdma_spi3_tx);

}

void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s)

{

// Task

}

void HAL_I2S_RxHalfCpltCallback(I2S_HandleTypeDef *hi2s)

{

// Task

}

void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)

{

// Task

}

void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s)

{

// Task

}

//Based on User action

static void EnableRxDma()

{

HAL_I2S_Receive_DMA(&hi2s3, _buffer, (2 * I2S_DMA_BUF_LEN));

}

static void DisableRxDma()

{

HAL_I2S_DMAPause(&hi2s3);

}

static void EnableTxDma()

{

HAL_I2S_Transmit_DMA(&hi2s3, _buffer, (2 * I2S_DMA_BUF_LEN));

}

static void DisableTxDma()

{

HAL_I2S_DMAPause(&hi2s3);

}

#i2s #-

officialkesh · ‎2016-11-30

Posted on November 30, 2016 at 09:20

In above code, DMA handler is not executed ...:(

Walid FTITI_O · ‎2016-11-30

Posted on November 30, 2016 at 09:55

Hi pinkesh,

Which STM32 device you are using ? Ensure that you have copied from a project of the same STM32 family/device or a compatible one -> check if the used DMA/stream or pin used are correct ( open the datasheet).

I propose that you refer to an I2S example inside the STM32Cube library relevent for your device, and compare the code with the generated one from CubeMx : As example:

the '' I2S_Audio'' example in

http://www.st.com/en/embedded-software/stm32cubef4.html

at this path: STM32Cube_FW_F4_V1.14.0\Projects\STM324xG_EVAL\Examples\I2S\I2S_Audio

-Hannibal-