rt-thread/bsp/stm32f411-nucleo/drivers/board.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-09-22     Bernard      add board.h to this bsp
 */
 
#include <rtthread.h>
#include "board.h"

/**
 * @addtogroup STM32
 */

/*@{*/
/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSI)
  *            SYSCLK(Hz)                     = 84000000
  *            HCLK(Hz)                       = 84000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 2
  *            APB2 Prescaler                 = 1
  *            HSI Frequency(Hz)              = 16000000
  *            PLL_M                          = 16
  *            PLL_N                          = 336
  *            PLL_P                          = 4
  *            PLL_Q                          = 7
  *            VDD(V)                         = 3.3
  *            Main regulator output voltage  = Scale2 mode
  *            Flash Latency(WS)              = 2
  * @param  None
  * @retval None
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;

  /* Enable Power Control clock */
  __HAL_RCC_PWR_CLK_ENABLE();
  
  /* The voltage scaling allows optimizing the power consumption when the device is 
     clocked below the maximum system frequency, to update the voltage scaling value 
     regarding system frequency refer to product datasheet.  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
  
  /* Enable HSI Oscillator and activate PLL with HSI as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 0x10;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != 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_DIV2;  
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;  
  if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
            while (1)
        {
            ;
        }
  }
}
/**
 * This is the timer interrupt service routine.
 *
 */
void SysTick_Handler(void)
{
    /* enter interrupt */
    rt_interrupt_enter();
    /* tick for HAL Library */
    HAL_IncTick();

    rt_tick_increase();

    /* leave interrupt */
    rt_interrupt_leave();
}

/* re-implementat tick interface for STM32 HAL */
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
    /*Configure the SysTick to have interrupt in 1ms time basis*/
    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/RT_TICK_PER_SECOND);

    /*Configure the SysTick IRQ priority */
    HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority ,0);

    /* Return function status */
    return HAL_OK;
}

void HAL_Delay(__IO uint32_t Delay)
{
    rt_thread_delay(Delay);
}

void HAL_SuspendTick(void)
{
    /* we should not suspend tick */
}

void HAL_ResumeTick(void)
{
    /* we should not resume tick */
}


/**
 * This function will initial STM32 board.
 */
void rt_hw_board_init()
{
    /* 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 @ 200 Mhz */
    SystemClock_Config();

#ifdef RT_USING_HEAP
    rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif

#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
    
#ifdef RT_USING_CONSOLE
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif

}



/*@}*/