/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-11-7      SummerGift   first version
 */

#include "drv_common.h"
#include "system_fm33lc0xx.h"

#ifdef RT_USING_SERIAL
#include "drv_usart.h"
#endif

#ifdef RT_USING_FINSH
#include <finsh.h>
static void reboot(uint8_t argc, char **argv)
{
    rt_hw_cpu_reset();
}
FINSH_FUNCTION_EXPORT_ALIAS(reboot, __cmd_reboot, Reboot System);
#endif /* RT_USING_FINSH */

/* SysTick configuration */
void rt_hw_systick_init(void)
{
	SystemCoreClockUpdate();
    SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
    NVIC_SetPriority(SysTick_IRQn, 0xFF);
}

/**
 * This is the timer interrupt service routine.
 *
 */
void SysTick_Handler(void)
{
    /* enter interrupt */
    rt_interrupt_enter();

    rt_tick_increase();

    /* leave interrupt */
    rt_interrupt_leave();
}

uint32_t HAL_GetTick(void)
{
    return rt_tick_get() * 1000 / RT_TICK_PER_SECOND;
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void _Error_Handler(char *s, int num)
{
    /* USER CODE BEGIN Error_Handler */
    /* User can add his own implementation to report the HAL error return state */
    while(1)
    {
    }
    /* USER CODE END Error_Handler */
}

/**
 * This function will delay for some us.
 *
 * @param us the delay time of us
 */
void rt_hw_us_delay(rt_uint32_t us)
{
    rt_uint32_t start, now, delta, reload, us_tick;
    start = SysTick->VAL;
    reload = SysTick->LOAD;
    us_tick = SystemCoreClock / 1000000UL;
    do {
        now = SysTick->VAL;
        delta = start > now ? start - now : reload + start - now;
    } while(delta < us_tick * us);
}

/**
 * This function will initial STM32 board.
 */
RT_WEAK void rt_hw_board_init()
{
	void SelRCHFToPLL(uint32_t rchf, uint32_t clock);

	SelRCHFToPLL(RCHF8M_TRIM,63);
    rt_hw_systick_init();
	
extern int Image$$RW_IRAM1$$ZI$$Limit;
#define HEAP_BEGIN      ((void *)&Image$$RW_IRAM1$$ZI$$Limit)

    /* Heap initialization */
#if defined(RT_USING_HEAP)
    rt_system_heap_init((void *)HEAP_BEGIN, (void *)(0x20000000+0x6000));
#endif

    /* USART driver initialization is open by default */
#ifdef RT_USING_SERIAL
    rt_hw_usart_init();
#endif

    /* Set the shell console output device */
#ifdef RT_USING_CONSOLE
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif

    /* Board underlying hardware initialization */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
}