102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
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/*
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* Copyright (C) 2021, Huada Semiconductor 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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* 2021-08-19 pjq 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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/**
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* @addtogroup HC32
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*/
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/*@{*/
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/**
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* @brief BSP clock initialize.
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* Set board system clock 24Mhz
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* @param None
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* @retval None
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*/
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void rt_hw_board_clock_init(void)
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{
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Sysctrl_SetRCHTrim(SysctrlRchFreq24MHz);
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Sysctrl_ClkSourceEnable(SysctrlClkRCH, TRUE);
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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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SystemCoreClockUpdate();
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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_IRQHandler(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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* This function will initialize HC32 board.
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*/
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void rt_hw_board_init()
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{
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/* Configure the System clock */
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rt_hw_board_clock_init();
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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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void rt_hw_us_delay(rt_uint32_t us)
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{
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uint32_t start, now, delta, reload, us_tick;
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start = SysTick->VAL;
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reload = SysTick->LOAD;
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us_tick = SystemCoreClock / 1000000UL;
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do{
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now = SysTick->VAL;
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delta = start > now ? start - now : reload + start - now;
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}
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while(delta < us_tick * us);
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}
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/*@}*/
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