STM32F401 I2S(full duplex)全双工示例代码

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2019 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

#define RECV_BUFF_SIZE (2048)
/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
I2S_HandleTypeDef hi2s2;
DMA_HandleTypeDef hdma_i2s2_ext_tx;
DMA_HandleTypeDef hdma_spi2_rx;

UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */
uint16_t recvData[RECV_BUFF_SIZE] = {0x55};
uint16_t sendData[RECV_BUFF_SIZE] = {0x5678};
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_I2S2_Init(void);
/* USER CODE BEGIN PFP */

int fputc(int ch, FILE *f)
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */
  HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF); 

  return ch;
}

/**
  * @brief I2S2 Initialization Function
  * @param None
  * @retval None
  */
static void W8_I2S2_Init(uint16_t MSmode, uint8_t format, uint32_t freq)
{
  hi2s2.Instance = SPI2;
  hi2s2.Init.Mode = MSmode;
  hi2s2.Init.Standard = format;
  hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B;
  hi2s2.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
  hi2s2.Init.AudioFreq = freq;
  hi2s2.Init.CPOL = I2S_CPOL_LOW;
  hi2s2.Init.ClockSource = I2S_CLOCK_PLL;
  hi2s2.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE;
  if (HAL_I2S_Init(&hi2s2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
    /* USER CODE BEGIN 1 */
    uint16_t recvStatus = 0;
    uint8_t casenum[8] = { 0 };
    uint16_t number = 0;
    uint32_t errorCount = 0;

    /* USER CODE END 1 */

    /* MCU Configuration--------------------------------------------------------*/

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();

    /* USER CODE BEGIN Init */

    /* USER CODE END Init */

    /* Configure the system clock */
    SystemClock_Config();

    /* USER CODE BEGIN SysInit */

    /* USER CODE END SysInit */

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_USART2_UART_Init();
    MX_I2S2_Init();
    
    /* USER CODE BEGIN 2 */
    printf("please input your case number, for example 0001#\r\n");
    HAL_UART_Receive(&huart2, casenum, 4, HAL_MAX_DELAY - 10);
    number = (casenum[0]-0x30)*1000 + (casenum[1]-0x30)*100 + (casenum[2]-0x30)*10 + (casenum[3]-0x30)*1;
    printf("case number: %d\r\n", number);
    
    switch( number )
    {
        case 2:
            W8_I2S2_Init(I2S_MODE_SLAVE_RX, I2S_STANDARD_PHILIPS, I2S_AUDIOFREQ_44K);
        break;
        
        case 4:
            W8_I2S2_Init(I2S_MODE_SLAVE_RX, I2S_STANDARD_MSB, I2S_AUDIOFREQ_44K);
        break;
        
        case 6:
            W8_I2S2_Init(I2S_MODE_SLAVE_RX, I2S_STANDARD_PCM_SHORT, I2S_AUDIOFREQ_44K);
        break;
        
        case 8:
            W8_I2S2_Init(I2S_MODE_SLAVE_RX, I2S_STANDARD_PCM_LONG, I2S_AUDIOFREQ_44K);
        break;
        
        default:
            
        break;
    }

    for(uint16_t i=0; i