122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/*
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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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* 2019-01-23 wangyq 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 <ald_cmu.h>
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#include <ald_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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/* hosc 12MHz, from hosc/3 pll to 48MHz */
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cmu_pll1_config(CMU_PLL1_INPUT_HOSC_3, CMU_PLL1_OUTPUT_48M);
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/* MCLK 48MHz*/
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cmu_clock_config(CMU_CLOCK_PLL1, 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(cmu_get_sys_clock() / 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_irq_cbk(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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/**
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* This function will delay for some us.
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*
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* @param us the delay time of us
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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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unsigned int 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 = cmu_get_sys_clock() / 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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} while(delta < us_tick * us);
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}
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