82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
/*
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* Copyright (c) 2006-2020, RT-Thread Development Team
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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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* 2021-02-11 supperthomas first version
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*
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include <stdio.h>
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#include "board.h"
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#include "mxc_sys.h"
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#ifdef RT_USING_SERIAL
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#include "drv_usart.h"
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#endif
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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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void rt_hw_systick_init(void)
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{
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uint32_t error;
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error = SYS_SysTick_Config(SYS_SysTick_GetFreq() / RT_TICK_PER_SECOND, 1, MXC_TMR0);
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if (error != E_NO_ERROR)
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{
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rt_kprintf("ERROR: Ticks is not valid");
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}
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}
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void rt_hw_board_init(void)
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{
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rt_hw_systick_init();
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#if defined(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_SERIAL
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rt_hw_usart_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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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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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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rt_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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{
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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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