/*
 * File      : board.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2009, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-09-22     Bernard      add board.h to this bsp
 * 2017-12-29     ZYH          Correctly generate the 48M clock
 */
#include <rtthread.h>
#include "board.h"
/**
 * @addtogroup STM32
 */
/*@{*/
#if defined(RCC_PERIPHCLK_SDIO) || defined(RCC_PERIPHCLK_CEC) || defined(RCC_PERIPHCLK_LTDC)\
    || defined(RCC_PERIPHCLK_SPDIFRX) || defined(RCC_PERIPHCLK_FMPI2C1) || defined(RCC_PERIPHCLK_LPTIM1)
    #warning Please give priority to the correctness of the clock tree when the peripherals are abnormal
#endif

static void SystemClock_Config(void)
{
    rt_uint32_t source_clk, sys_clk;

#if !defined(RT_USING_HSI) && (RT_HSE_VALVE % 1000000 != 0)
#error HSE must be integer of MHz
#endif
#ifdef RT_USING_HSI
#define CLOCK_SOURE_VALUE  HSI_VALUE
#else
#define CLOCK_SOURE_VALUE  HSE_VALUE
#endif    

    source_clk = CLOCK_SOURE_VALUE / 1000000UL;
    sys_clk = HCLK_VALUE / 1000000UL;
    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
#if defined(RT_USING_RTC) || defined(RCC_PERIPHCLK_CLK48)
    RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
#endif
    /**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
    */
#ifdef RT_USING_HSI
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
#else
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
#endif
#ifdef RT_USING_RTC
    RCC_OscInitStruct.OscillatorType |= RCC_OSCILLATORTYPE_LSI;
    RCC_OscInitStruct.LSIState = RCC_LSI_ON;
#endif
#ifdef RT_USING_HSI
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = source_clk;
#else
#ifdef BSP_HSE_BY_PASS
    RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
#else
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
#endif
#endif
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
#ifdef RT_USING_HSI
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
#else
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
#endif
    if (source_clk % 2 == 0)
    {
        RCC_OscInitStruct.PLL.PLLM = source_clk / 2; //Get 2M clock
        if ((sys_clk * 4) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 2;//Get 4*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;//Get HCLK_VALUE
        }
        else if ((sys_clk * 6) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 3;//Get 6*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6;//Get HCLK_VALUE
        }
        else if ((sys_clk * 8) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 4;//Get 8*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;//Get HCLK_VALUE
        }
        else
        {
            //can not get 48M Clock USB is unuseable
            RCC_OscInitStruct.PLL.PLLN = sys_clk;//Get 2*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;//Get HCLK_VALUE
        }
    }
    else
    {
        RCC_OscInitStruct.PLL.PLLM = source_clk;//Get 1M clock
        if ((sys_clk * 4) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 4;//Get 4*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;//Get HCLK_VALUE
        }
        else if ((sys_clk * 6) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 6;//Get 6*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6;//Get HCLK_VALUE
        }
        else if ((sys_clk * 8) % 48 == 0)
        {
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 8;//Get 8*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;//Get HCLK_VALUE
        }
        else
        {
            //can not get 48M Clock USB is unuseable
            RCC_OscInitStruct.PLL.PLLN = sys_clk * 2;//Get 2*HCLK_VALUE
            RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;//Get HCLK_VALUE
        }
    }
    RCC_OscInitStruct.PLL.PLLQ = source_clk / RCC_OscInitStruct.PLL.PLLM * RCC_OscInitStruct.PLL.PLLN / 48; //Get 48M Clock
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        while (1)
        {}
    }
    /**Initializes the CPU, AHB and APB busses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                  | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
#if (RT_HSE_HCLK <= 42000000UL)
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
    {
        while (1)
        {}
    }
#elif (RT_HSE_HCLK <= 84000000UL)
    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)
        {}
    }
#elif (RT_HSE_HCLK <= 100000000UL)
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
    {
        while (1)
        {}
    }
#elif (RT_HSE_HCLK <= 168000000UL)
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
    {
        while (1)
        {}
    }
#else
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV8;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV4;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
    {
        while (1)
        {}
    }
#endif
#if defined(RT_USING_RTC) || defined(RCC_PERIPHCLK_CLK48)
    PeriphClkInitStruct.PeriphClockSelection = 0;
#ifdef RT_USING_RTC
    PeriphClkInitStruct.PeriphClockSelection |= RCC_PERIPHCLK_RTC;
    PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
#endif
#ifdef RCC_PERIPHCLK_CLK48
    PeriphClkInitStruct.PeriphClockSelection |= RCC_PERIPHCLK_CLK48;
    PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLQ;
#endif
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
        while (1)
        {}
    }
#endif
}

/**
 * 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 */
}

void HAL_MspInit(void)
{
    HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
    /* System interrupt init*/
    /* MemoryManagement_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(MemoryManagement_IRQn, 0, 0);
    /* BusFault_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(BusFault_IRQn, 0, 0);
    /* UsageFault_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(UsageFault_IRQn, 0, 0);
    /* SVCall_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(SVCall_IRQn, 0, 0);
    /* DebugMonitor_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(DebugMonitor_IRQn, 0, 0);
    /* PendSV_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(PendSV_IRQn, 15, 0);
    /* SysTick_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(SysTick_IRQn, 15, 0);
}

/**
 * This function will initial STM32 board.
 */
void rt_hw_board_init()
{
    /* Configure the system clock @ 84 Mhz */
    SystemClock_Config();
    HAL_Init();
#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
}