main.c

/**
******************************************************************************
* @file    main.c
* @author  MCD Application Team
* @brief   Audio SRC main file.
******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */


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

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USBH_HandleTypeDef hUSBHost;
AUDIO_ApplicationTypeDef appli_state = APPLICATION_IDLE;

/* Private function prototypes -----------------------------------------------*/
static void MPU_Config(void);
static void SystemClock_Config(void);
static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id);
static void AUDIO_InitApplication(void);
static void CPU_CACHE_Enable(void);


/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* Configure the MPU attributes as Write Through */
  MPU_Config();

  /* Enable the CPU Cache */
  CPU_CACHE_Enable();

  /* STM32F7xx HAL library initialization:
       - Configure the Flash ART accelerator on ITCM interface
       - Configure the Systick to generate an interrupt each 1 msec
       - Set NVIC Group Priority to 4
       - Global MSP (MCU Support Package) initialization
     */
  HAL_Init();

  /* Configure the system clock to 216 MHz */
  SystemClock_Config();

  /* Init HW needed for Audio Application */
  AUDIO_InitApplication();

  /* Configure and Init TS module */
  BSP_TS_Init(BSP_LCD_GetXSize(), BSP_LCD_GetYSize());

  /* Init Host Library */
  USBH_Init(&hUSBHost, USBH_UserProcess, 0);

  /* Add Supported Class */
  USBH_RegisterClass(&hUSBHost, USBH_MSC_CLASS);

  /* Start Host Process */
  USBH_Start(&hUSBHost);


  /* Run Application (Blocking mode) */
  while (1)
  {
    /* USB Host Background task */
    USBH_Process(&hUSBHost);

    /* AUDIO Menu Process */
    AUDIO_MenuProcess();

    BSP_LED_Toggle(LED1);
  }
}



/*******************************************************************************
                            Static Function
*******************************************************************************/

/**
  * @brief  Audio Application Init.
  * @param  None
  * @retval None
  */
static void AUDIO_InitApplication(void)
{
  /* Configure LED1 */
  BSP_LED_Init(LED1);

  /* Initialize the LCD */
  BSP_LCD_Init();

  /* LCD Layer Initialization */
  BSP_LCD_LayerDefaultInit(1, LCD_FB_START_ADDRESS);

  /* Select the LCD Layer */
  BSP_LCD_SelectLayer(1);

  /* Enable the display */
  BSP_LCD_DisplayOn();

  /* Init the LCD Log module */
  LCD_LOG_Init();

  LCD_LOG_SetHeader((uint8_t *)"Audio MP3 Playback Application");

  LCD_UsrLog("USB Host library started.\n");

  /* Start Audio interface */
  USBH_UsrLog("Starting Audio Demo");

  /* Initialize audio player interface and allocates memory */
  if(PLAYER_Init() != AUDIO_ERROR_NONE)
  {
    /* Error */
    Error_Handler();
  }

}

/**
  * @brief  User Process
  * @param  phost: Host Handle
  * @param  id: Host Library user message ID
  * @retval None
  */
static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id)
{
  switch(id)
  {
  case HOST_USER_SELECT_CONFIGURATION:
    break;

  case HOST_USER_DISCONNECTION:
    appli_state = APPLICATION_DISCONNECT;
    break;

  case HOST_USER_CLASS_ACTIVE:
    appli_state = APPLICATION_READY;
    break;

  case HOST_USER_CONNECTION:
    appli_state = APPLICATION_START;
    break;

  default:
    break;
  }
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow :
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 216000000
  *            HCLK(Hz)                       = 216000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 4
  *            APB2 Prescaler                 = 2
  *            HSE Frequency(Hz)              = 25000000
  *            PLL_M                          = 25
  *            PLL_N                          = 432
  *            PLL_P                          = 2
  *            PLL_Q                          = 9
  *            PLLSAI_N                       = 192
  *            PLLSAI_P                       = 4
  *            VDD(V)                         = 3.3
  *            Main regulator output voltage  = Scale1 mode
  *            Flash Latency(WS)              = 7
  * @param  None
  * @retval None
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
  HAL_StatusTypeDef ret = HAL_OK;

  /* Enable HSE Oscillator and activate PLL with HSE as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 9;

  ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }

  /* Activate the OverDrive to reach the 216 MHz Frequency */
  ret = HAL_PWREx_EnableOverDrive();
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }

  /* Select PLLSAI output as USB clock source */
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48;
  PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48SOURCE_PLLSAIP;
  PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
  PeriphClkInitStruct.PLLSAI.PLLSAIQ = 4;
  PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV4;
  ret = HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }

  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);
  if(ret != HAL_OK)
  {
    while(1) { ; }
  }
}

/**
  * @brief  Clock Config.
  * @param  hsai: might be required to set audio peripheral predivider if any.
  * @param  AudioFreq: Audio frequency used to play the audio stream.
  * @note   This API is called by BSP_AUDIO_OUT_Init() and BSP_AUDIO_OUT_SetFrequency()
  *         Being __weak it can be overwritten by the application
  * @retval None
  */
void BSP_AUDIO_OUT_ClockConfig(SAI_HandleTypeDef *hsai, uint32_t AudioFreq, void *Params)
{
  RCC_PeriphCLKInitTypeDef RCC_ExCLKInitStruct;

  HAL_RCCEx_GetPeriphCLKConfig(&RCC_ExCLKInitStruct);

  /* Set the PLL configuration according to the audio frequency */
  if((AudioFreq == AUDIO_FREQUENCY_11K) || (AudioFreq == AUDIO_FREQUENCY_22K) || (AudioFreq == AUDIO_FREQUENCY_44K))
  {
    /* Configure PLLSAI prescalers */
    /* PLLI2S_VCO: VCO_429M
    SAI_CLK(first level) = PLLI2S_VCO/PLLSAIQ = 429/2 = 214.5 Mhz
    SAI_CLK_x = SAI_CLK(first level)/PLLI2SDivQ = 214.5/19 = 11.289 Mhz */
    RCC_ExCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
    RCC_ExCLKInitStruct.Sai2ClockSelection = RCC_SAI2CLKSOURCE_PLLI2S;
    RCC_ExCLKInitStruct.PLLI2S.PLLI2SP = 8;
    RCC_ExCLKInitStruct.PLLI2S.PLLI2SN = 429;
    RCC_ExCLKInitStruct.PLLI2S.PLLI2SQ = 2;
    RCC_ExCLKInitStruct.PLLI2SDivQ = 19;
    HAL_RCCEx_PeriphCLKConfig(&RCC_ExCLKInitStruct);
  }
  else /* AUDIO_FREQUENCY_8K, AUDIO_FREQUENCY_16K, AUDIO_FREQUENCY_48K), AUDIO_FREQUENCY_96K */
  {
    /* SAI clock config
    PLLI2S_VCO: VCO_344M
    SAI_CLK(first level) = PLLI2S_VCO/PLLSAIQ = 344/7 = 49.142 Mhz
    SAI_CLK_x = SAI_CLK(first level)/PLLI2SDivQ = 49.142/1 = 49.142 Mhz */
    RCC_ExCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
    RCC_ExCLKInitStruct.Sai2ClockSelection = RCC_SAI2CLKSOURCE_PLLI2S;
    RCC_ExCLKInitStruct.PLLI2S.PLLI2SN = 344;
    RCC_ExCLKInitStruct.PLLI2S.PLLI2SQ = 7;
    RCC_ExCLKInitStruct.PLLI2SDivQ = 1;
    HAL_RCCEx_PeriphCLKConfig(&RCC_ExCLKInitStruct);
  }
}

/**
  * @brief  Clock Config.
  * @param  hltdc: LTDC handle
  * @note   This API is called by BSP_LCD_Init()
  * @retval None
  */
void BSP_LCD_ClockConfig(LTDC_HandleTypeDef *hltdc, void *Params)
{
  static RCC_PeriphCLKInitTypeDef  periph_clk_init_struct;

  /* RK043FN48H LCD clock configuration */
  /* PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 Mhz */
  /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN = 192 Mhz */
  /* PLLLCDCLK = PLLSAI_VCO Output/PLLSAIR = 192/5 = 38.4 Mhz */
  /* LTDC clock frequency = PLLLCDCLK / LTDC_PLLSAI_DIVR_4 = 38.4/4 = 9.6Mhz */
  periph_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
  periph_clk_init_struct.PLLSAI.PLLSAIN = 192;
  periph_clk_init_struct.PLLSAI.PLLSAIR = RK043FN48H_FREQUENCY_DIVIDER;
  periph_clk_init_struct.PLLSAIDivR = RCC_PLLSAIDIVR_4;
  HAL_RCCEx_PeriphCLKConfig(&periph_clk_init_struct);
}

/**
  * @brief  Configure the MPU attributes as Write Through for SRAM1/2.
  * @note   The Base Address is 0x20010000 since this memory interface is the AXI.
  *         The Region Size is 256KB, it is related to SRAM1 and SRAM2  memory size.
  * @param  None
  * @retval None
  */
static void MPU_Config(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;

  /* Disable the MPU */
  HAL_MPU_Disable();

  /* Configure the MPU attributes as WT for SRAM */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x20010000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_256KB;
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x00;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Enable the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}

/**
* @brief  This function is executed in case of error occurrence.
* @param  None
* @retval None
*/
void Error_Handler(void)
{
  while(1)
  {
    /*BSP_LED_Toggle(LED3);*/
    HAL_Delay(100);
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @brief  CPU L1-Cache enable.
  * @param  None
  * @retval None
  */
static void CPU_CACHE_Enable(void)
{
  /* Enable I-Cache */
  SCB_EnableICache();

  /* Enable D-Cache */
  SCB_EnableDCache();
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/