107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/*
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* Copyright (c) 2006-2022, 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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* 2017-07-24 Tanek the first version
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* 2018-11-12 Ernest Chen modify copyright
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*/
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#include "board.h"
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#include <stdint.h>
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#include "drv_usart.h"
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#include <rthw.h>
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#include <rtthread.h>
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/* Updates the variable SystemCoreClock and must be called
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* whenever the core clock is changed during program execution.
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*/
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extern void SystemCoreClockUpdate(void);
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/* core clock */
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extern uint32_t SystemCoreClock;
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volatile rt_uint32_t g_ticks=0;
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static uint32_t _SysTick_Config(rt_uint32_t ticks)
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{
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g_ticks=ticks;
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/* disable hardware pushing stack automatically and disable interrupt nesting */
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PFIC->CFGR=0xFA050003;
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NVIC_SetPriority(SysTicK_IRQn,0xf0);
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NVIC_SetPriority(Software_IRQn,0xf0);
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SysTick->CTLR=0;
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SysTick->CNTL0=0;SysTick->CNTL1=0;SysTick->CNTL2=0;SysTick->CNTL3=0;
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SysTick->CNTH0=0;SysTick->CNTH1=0;SysTick->CNTH2=0;SysTick->CNTH3=0;
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SysTick->CMPLR0=(rt_uint8_t)(g_ticks-1);
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SysTick->CMPLR1=(rt_uint8_t)((g_ticks-1)>>8);
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SysTick->CMPLR2=(rt_uint8_t)((g_ticks-1)>>16);
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SysTick->CMPLR3=(rt_uint8_t)((g_ticks-1)>>24);
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SysTick->CMPHR0=0;SysTick->CMPHR1=0;SysTick->CMPHR2=0;SysTick->CMPHR3=0;
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SysTick->CTLR=0x1;
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NVIC_EnableIRQ(SysTicK_IRQn);
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NVIC_EnableIRQ(Software_IRQn);
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return 0;
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}
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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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#define RT_HEAP_SIZE (1024)
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/* heap default size: 4K(1024 * 4) */
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static uint32_t rt_heap[RT_HEAP_SIZE];
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RT_WEAK void *rt_heap_begin_get(void)
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{
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return rt_heap;
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}
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RT_WEAK void *rt_heap_end_get(void)
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{
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return rt_heap + RT_HEAP_SIZE;
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}
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#endif
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/**
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* This function will initial your board.
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*/
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void rt_hw_board_init()
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{
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/* System Clock Update */
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SystemCoreClockUpdate();
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/* System Tick Configuration, systick clock is HCLK/8 */
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_SysTick_Config(SystemCoreClock / 8 / RT_TICK_PER_SECOND);
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/* Call components board initial (use INIT_BOARD_EXPORT()) */
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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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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
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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 SysTick_Handler(void) __attribute__((interrupt()));
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void SysTick_Handler(void)
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{
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GET_INT_SP();
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/* enter interrupt */
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rt_interrupt_enter();
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SysTick->CTLR=0;
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SysTick->CNTL0=0;SysTick->CNTL1=0;SysTick->CNTL2=0;SysTick->CNTL3=0;
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SysTick->CNTH0=0;SysTick->CNTH1=0;SysTick->CNTH2=0;SysTick->CNTH3=0;
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SysTick->CTLR=0x1;
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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FREE_INT_SP();
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}
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