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/*
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-10-23 yuzrain the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "drv_uart.h"
#include "drv_gpio.h"
#include "md_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)
{
/*-------------------------Clock Config-------------------------/
* Config system clock to 48MHz of which the clock source
* is PLL0.
*/
//
// Open PLL0/HRC then wait it ready.
//
SET_BIT(RCU->CON, RCU_CON_PLL0ON_MSK);
SET_BIT(RCU->CON, RCU_CON_HRCON_MSK);
/* Wait HRC clock steady. */
while (!READ_BIT(RCU->CON, RCU_CON_HRCRDY_MSK));
//
// Change system clock source,PLL0,48MHz.
//
/* Chose PLL0 as system clock. */
MODIFY_REG(RCU->CFG, RCU_CFG_SW_MSK, (0x4 << RCU_CFG_SW_POSS));
/* Config mul of PLL0. */
MODIFY_REG(RCU->CFG, RCU_CFG_PLLMUL_MSK, (11 << RCU_CFG_PLLMUL_POSS));
//
// Start to change system clock and wait it ready.
//
/* Config flash read wait time. */
MODIFY_REG(FC->CON, FC_CON_WAIT_MSK, (0X2 << FC_CON_WAIT_POSS));
/* Start to change. */
SET_BIT(RCU->CFG, RCU_CFG_CKCFG_MSK);
/* Wait system clock ready. */
while (!READ_BIT(RCU->CON, RCU_CON_SWRDY_MSK));
//
// Remember the system clock.
//
SystemCoreClock = 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(SystemCoreClock / RT_TICK_PER_SECOND);
}
/**
* This is the timer interrupt service routine.
*
*/
void SysTick_Handler(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
}
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