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/*
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-01-23 wangyq the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "drv_uart.h"
#include "drv_gpio.h"
#include <ald_cmu.h>
#include <ald_gpio.h>
/**
* @addtogroup es32f0
*/
/*@{*/
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures Vector Table base location.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
}
/*******************************************************************************
* Function Name : SystemClock_Configuration
* Description : Configures the System Clock.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void SystemClock_Config(void)
{
/* hosc 12MHz, from hosc/3 pll to 48MHz */
cmu_pll1_config(CMU_PLL1_INPUT_HOSC_3, CMU_PLL1_OUTPUT_48M);
/* MCLK 48MHz*/
cmu_clock_config(CMU_CLOCK_PLL1, 48000000);
}
/*******************************************************************************
* Function Name : SysTick_Configuration
* Description : Configures the SysTick for OS tick.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void SysTick_Configuration(void)
{
/* ticks = sysclk / RT_TICK_PER_SECOND */
SysTick_Config(cmu_get_sys_clock() / RT_TICK_PER_SECOND);
}
/**
* This is the timer interrupt service routine.
*
*/
void systick_irq_cbk(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/*@}*/
/**
* This function will initial ES32F0 board.
*/
void rt_hw_board_init(void)
{
/* NVIC Configuration */
NVIC_Configuration();
/*System Clock Configuration */
SystemClock_Config();
/* Configure the SysTick */
SysTick_Configuration();
#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
}
/**
* This function will delay for some us.
*
* @param us the delay time of us
*/
void rt_hw_us_delay(rt_uint32_t us)
{
unsigned int start, now, delta, reload, us_tick;
start = SysTick->VAL;
reload = SysTick->LOAD;
us_tick = cmu_get_sys_clock() / 1000000UL;
do
{
now = SysTick->VAL;
delta = start > now ? start - now : reload + start - now;
}
while (delta < us_tick * us);
}
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