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- /*
- * Copyright (C) 2021, Huada Semiconductor Co., Ltd.
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2021-08-19 pjq first version
- */
- #include <rthw.h>
- #include <rtthread.h>
- #include "board.h"
- /**
- * @addtogroup HC32
- */
- /*@{*/
- /**
- * @brief BSP clock initialize.
- * Set board system clock 24Mhz
- * @param None
- * @retval None
- */
- void rt_hw_board_clock_init(void)
- {
- Sysctrl_SetRCHTrim(SysctrlRchFreq24MHz);
- Sysctrl_ClkSourceEnable(SysctrlClkRCH, TRUE);
- }
- /*******************************************************************************
- * Function Name : SysTick_Configuration
- * Description : Configures the SysTick for OS tick.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void SysTick_Configuration(void)
- {
- SystemCoreClockUpdate();
- 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 initialize HC32 board.
- */
- void rt_hw_board_init()
- {
- /* Configure the System clock */
- rt_hw_board_clock_init();
- /* 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
- #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
- rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
- #endif
- }
- void rt_hw_us_delay(rt_uint32_t us)
- {
- 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);
- }
- /*@}*/
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