mirror of
https://github.com/STMicroelectronics/STM32CubeF7.git
synced 2025-05-05 19:30:14 +08:00
341 lines
9.7 KiB
C
341 lines
9.7 KiB
C
/**
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******************************************************************************
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* @file I2S/I2S_DataExchangeInterrupt/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to configure I2S using
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* the STM32F7xx HAL API.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F7xx_HAL_Examples
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* @{
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*/
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/** @addtogroup I2S_DataExchangeInterrupt
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define I2S_MASTER_TRANSMITTER
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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uint16_t I2S_Buffer_Tx[32] = {0x0102, 0x0304, 0x0506, 0x0708, 0x090A, 0x0B0C,
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0x0D0E, 0x0F10, 0x1112, 0x1314, 0x1516, 0x1718,
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0x191A, 0x1B1C, 0x1D1E, 0x1F20, 0x2122, 0x2324,
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0x2526, 0x2728, 0x292A, 0x2B2C, 0x2D2E, 0x2F30,
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0x3132, 0x3334, 0x3536, 0x3738, 0x393A, 0x3B3C,
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0x3D3E, 0x3F40};
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uint16_t I2S_Buffer_Rx[32]={0};
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uint8_t TransferState, TransferStatus =0;
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__IO uint8_t ReceiveState =0;
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I2S_HandleTypeDef I2SHandle;
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/* Private function prototypes -----------------------------------------------*/
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static void MPU_Config(void);
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void SystemClock_Config(void);
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static void CPU_CACHE_Enable(void);
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static void Error_Handler(void);
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#if !defined (I2S_MASTER_TRANSMITTER)
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static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
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#endif
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* Configure the MPU attributes */
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MPU_Config();
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/* Enable the CPU Cache */
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CPU_CACHE_Enable();
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/* STM32F7xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 216 MHz */
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SystemClock_Config();
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/* Configure LEDs */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED3);
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/* Configure User push-button */
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BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);
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I2SHandle.Instance = SPI1;
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I2SHandle.Init.AudioFreq = I2S_AUDIOFREQ_48K;
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I2SHandle.Init.ClockSource = I2S_CLOCK_SYSCLK;
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I2SHandle.Init.CPOL = I2S_CPOL_LOW;
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I2SHandle.Init.DataFormat = I2S_DATAFORMAT_16B;
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I2SHandle.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
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I2SHandle.Init.Standard = I2S_STANDARD_PHILIPS;
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#ifdef I2S_MASTER_TRANSMITTER
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I2SHandle.Init.Mode = I2S_MODE_MASTER_TX;
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#else
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I2SHandle.Init.Mode = I2S_MODE_SLAVE_RX;
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#endif
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if(HAL_I2S_Init(&I2SHandle) != HAL_OK)
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{
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Error_Handler();
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}
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#if defined (I2S_MASTER_TRANSMITTER)
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while (BSP_PB_GetState(BUTTON_USER) == RESET)
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{}
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HAL_I2S_Transmit_IT(&I2SHandle, I2S_Buffer_Tx, 32);
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while (TransferState ==0);
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#else
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HAL_I2S_Receive_IT(&I2SHandle, I2S_Buffer_Rx, 32);
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/* Wait the end of communication */
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while (ReceiveState ==0);
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/* Check if the data transmitted from Master Board and received by
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Slave Board are the same */
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TransferStatus = Buffercmp(I2S_Buffer_Rx, (uint16_t*)I2S_Buffer_Tx, 32);
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if (TransferStatus == 0) /* successful transfer */
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{
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/* Green Led On */
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BSP_LED_On(LED1);
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}
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else /* unsuccessful transfer */
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{
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/* Red Led On */
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BSP_LED_On(LED3);
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}
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#endif
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while (1)
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{
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}
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}
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/**
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* @brief Tx Transfer completed callbacks
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* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
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* the configuration information for I2S module
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* @retval None
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*/
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void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)
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{
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TransferState = 1;
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/* Led On */
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BSP_LED_On(LED1);
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}
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/**
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* @brief Rx Transfer completed callbacks
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* @param hi2s: pointer to a I2S_HandleTypeDef structure that contains
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* the configuration information for I2S module
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* @retval None
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*/
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void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s)
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{
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ReceiveState = 1;
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}
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#if !defined (I2S_MASTER_TRANSMITTER)
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/**
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* @brief Compares two buffers.
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* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length
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* @retval PASSED: pBuffer1 identical to pBuffer2
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* FAILED: pBuffer1 differs from pBuffer2
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*/
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static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
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{
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while (BufferLength--)
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{
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if (*pBuffer1 != *pBuffer2)
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{
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return 1;
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}
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pBuffer1++;
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pBuffer2++;
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}
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return 0;
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}
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#endif
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 216000000
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* HCLK(Hz) = 216000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 8000000
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* PLL_M = 8
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* PLL_N = 432
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* PLL_P = 2
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* PLL_Q = 9
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* PLL_R = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 7
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
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RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 432;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 9;
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RCC_OscInitStruct.PLL.PLLR = 7;
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if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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while(1) {};
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}
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/* Activate the OverDrive to reach the 216 Mhz Frequency */
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if(HAL_PWREx_EnableOverDrive() != HAL_OK)
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{
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while(1) {};
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
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{
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while(1) {};
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}
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}
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/**
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* @brief CPU L1-Cache enable.
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* @param None
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* @retval None
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*/
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static void CPU_CACHE_Enable(void)
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{
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/* Enable I-Cache */
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SCB_EnableICache();
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/* Enable D-Cache */
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SCB_EnableDCache();
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Infinite loop */
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while(1)
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{
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}
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}
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/**
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* @brief Configure the MPU attributes
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* @param None
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* @retval None
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*/
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static void MPU_Config(void)
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{
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MPU_Region_InitTypeDef MPU_InitStruct;
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/* Disable the MPU */
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HAL_MPU_Disable();
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/* Configure the MPU as Strongly ordered for not defined regions */
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MPU_InitStruct.Enable = MPU_REGION_ENABLE;
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MPU_InitStruct.BaseAddress = 0x00;
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MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
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MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
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MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
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MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
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MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
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MPU_InitStruct.Number = MPU_REGION_NUMBER0;
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MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
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MPU_InitStruct.SubRegionDisable = 0x87;
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MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
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HAL_MPU_ConfigRegion(&MPU_InitStruct);
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/* Enable the MPU */
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HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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