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128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/**
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******************************************************************************
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* File Name : I2S.c
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* Description : This file provides code for the configuration
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* of the I2S instances.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2019 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "i2s.h"
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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I2S_HandleTypeDef hi2s2;
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/* I2S2 init function */
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void MX_I2S2_Init(void)
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{
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hi2s2.Instance = SPI2;
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hi2s2.Init.Mode = I2S_MODE_MASTER_TX;
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hi2s2.Init.Standard = I2S_STANDARD_PHILIPS;
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hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B;
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hi2s2.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
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hi2s2.Init.AudioFreq = I2S_AUDIOFREQ_8K;
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hi2s2.Init.CPOL = I2S_CPOL_LOW;
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hi2s2.Init.ClockSource = I2S_CLOCK_PLL;
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hi2s2.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE;
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if (HAL_I2S_Init(&hi2s2) != HAL_OK)
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{
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Error_Handler();
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}
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}
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void HAL_I2S_MspInit(I2S_HandleTypeDef* i2sHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(i2sHandle->Instance==SPI2)
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{
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/* USER CODE BEGIN SPI2_MspInit 0 */
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/* USER CODE END SPI2_MspInit 0 */
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/* I2S2 clock enable */
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__HAL_RCC_SPI2_CLK_ENABLE();
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/**I2S2 GPIO Configuration
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PC2 ------> I2S2_ext_SD
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PC3 ------> I2S2_SD
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PB10 ------> I2S2_CK
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PB12 ------> I2S2_WS
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_2;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Alternate = GPIO_AF6_I2S2ext;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = PDM_OUT_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
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HAL_GPIO_Init(PDM_OUT_GPIO_Port, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = CLK_IN_Pin|GPIO_PIN_12;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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/* USER CODE BEGIN SPI2_MspInit 1 */
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/* USER CODE END SPI2_MspInit 1 */
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}
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}
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void HAL_I2S_MspDeInit(I2S_HandleTypeDef* i2sHandle)
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{
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if(i2sHandle->Instance==SPI2)
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{
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/* USER CODE BEGIN SPI2_MspDeInit 0 */
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/* USER CODE END SPI2_MspDeInit 0 */
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/* Peripheral clock disable */
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__HAL_RCC_SPI2_CLK_DISABLE();
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/**I2S2 GPIO Configuration
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PC2 ------> I2S2_ext_SD
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PC3 ------> I2S2_SD
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PB10 ------> I2S2_CK
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PB12 ------> I2S2_WS
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*/
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HAL_GPIO_DeInit(GPIOC, GPIO_PIN_2|PDM_OUT_Pin);
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HAL_GPIO_DeInit(GPIOB, CLK_IN_Pin|GPIO_PIN_12);
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/* USER CODE BEGIN SPI2_MspDeInit 1 */
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/* USER CODE END SPI2_MspDeInit 1 */
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}
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}
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/* USER CODE BEGIN 1 */
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/* USER CODE END 1 */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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