137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
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/*
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* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-10-23 yuzrain the first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "drv_uart.h"
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#include "drv_gpio.h"
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#include "md_gpio.h"
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/**
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* @addtogroup es32f0
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*/
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/*@{*/
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/*******************************************************************************
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* Function Name : NVIC_Configuration
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* Description : Configures Vector Table base location.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void NVIC_Configuration(void)
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{
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}
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/*******************************************************************************
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* Function Name : SystemClock_Configuration
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* Description : Configures the System Clock.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void SystemClock_Config(void)
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{
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/*-------------------------Clock Config-------------------------/
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* Config system clock to 48MHz of which the clock source
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* is PLL0.
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*/
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//
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// Open PLL0/HRC then wait it ready.
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//
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SET_BIT(RCU->CON, RCU_CON_PLL0ON_MSK);
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SET_BIT(RCU->CON, RCU_CON_HRCON_MSK);
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/* Wait HRC clock steady. */
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while (!READ_BIT(RCU->CON, RCU_CON_HRCRDY_MSK));
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//
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// Change system clock source,PLL0,48MHz.
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//
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/* Chose PLL0 as system clock. */
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MODIFY_REG(RCU->CFG, RCU_CFG_SW_MSK, (0x4 << RCU_CFG_SW_POSS));
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/* Config mul of PLL0. */
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MODIFY_REG(RCU->CFG, RCU_CFG_PLLMUL_MSK, (11 << RCU_CFG_PLLMUL_POSS));
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//
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// Start to change system clock and wait it ready.
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//
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/* Config flash read wait time. */
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MODIFY_REG(FC->CON, FC_CON_WAIT_MSK, (0X2 << FC_CON_WAIT_POSS));
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/* Start to change. */
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SET_BIT(RCU->CFG, RCU_CFG_CKCFG_MSK);
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/* Wait system clock ready. */
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while (!READ_BIT(RCU->CON, RCU_CON_SWRDY_MSK));
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//
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// Remember the system clock.
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//
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SystemCoreClock = 48000000;
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}
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/*******************************************************************************
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* Function Name : SysTick_Configuration
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* Description : Configures the SysTick for OS tick.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void SysTick_Configuration(void)
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{
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/* ticks = sysclk / RT_TICK_PER_SECOND */
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SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
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}
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void SysTick_Handler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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/*@}*/
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/**
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* This function will initial ES32F0 board.
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*/
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void rt_hw_board_init(void)
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{
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/* NVIC Configuration */
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NVIC_Configuration();
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/*System Clock Configuration */
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SystemClock_Config();
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/* Configure the SysTick */
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SysTick_Configuration();
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#ifdef RT_USING_HEAP
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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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#ifdef RT_USING_CONSOLE
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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}
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