/* mbed Microcontroller Library
 * SPDX-License-Identifier: BSD-3-Clause
 ******************************************************************************
 *
 * Copyright (c) 2021 STMicroelectronics.
 * All rights reserved.
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *                        opensource.org/licenses/BSD-3-Clause
 *
 ******************************************************************************
*/

/**
  * This file configures the system clock as follows:
  *-----------------------------------------------------------------------------
  * System clock source | HSE (external 32 MHz clock)
  *-----------------------------------------------------------------------------
  * SYSCLK(MHz)         | 48
  * AHBCLK (MHz)        | 48
  * APB1CLK (MHz)       | 48
  * APB2CLK (MHz)       | 48
  * USB capable         | NO
  *-----------------------------------------------------------------------------
**/

#include "mbed_assert.h"
#include "objects.h"

/**
  * @brief  Configures the System clock source, PLL Multiplier and Divider factors, AHB/APBx prescalers
  * @note   This function should be called only once the RCC clock configuration
  *         is reset to the default reset state (done in SystemInit() function).
  * @param  None
  * @retval None
  */

MBED_WEAK void SetSysClock(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    /** Configure the main internal regulator output voltage
    */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
    /** Initializes the CPU, AHB and APB busses clocks
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
    RCC_OscInitStruct.MSIState = RCC_MSI_ON;
    RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
    MBED_ASSERT(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK);
    /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3 | RCC_CLOCKTYPE_HCLK
                                  | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1
                                  | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
    MBED_ASSERT(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) == HAL_OK);
    /* Peripheral clock enable */
}