165 lines
4.6 KiB
C
165 lines
4.6 KiB
C
/*
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* Copyright (c) 2006-2019, 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 "user_sys.h"
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#include "drv_usart.h"
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#include "bsp_flash.h"
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#include <rthw.h>
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#include <rtthread.h>
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// Holds the system core clock, which is the system clock
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// frequency supplied to the SysTick timer and the processor
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// core clock.
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extern uint32_t SystemCoreClock;
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static uint32_t _SysTick_Config(rt_uint32_t ticks)
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{
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// 抢占位:1 优先级:111B = 7
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NVIC_SetPriority(SysTicK_IRQn, 0xf0);
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NVIC_SetPriority(Software_IRQn, 0xf0);
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NVIC_EnableIRQ(SysTicK_IRQn);
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NVIC_EnableIRQ(Software_IRQn);
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SysTick->CTLR = 0;
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SysTick->SR = 0;
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SysTick->CNT = 0;
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SysTick->CMP = ticks - 1;
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// SysTick->CTLR = 0xF; // 向上计数
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// 改成向下计数，搞得和CM3类似
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SysTick->CTLR = 0x001F; // 向下计数 0---- 1 1111
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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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#if (USING_MAX_HEAP_SIZE == 0)
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#define RT_HEAP_SIZE (1024)
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static uint32_t rt_heap[RT_HEAP_SIZE]; // heap default size: 4K(1024 * 4)
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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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#else
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// RT_WEAK void *rt_heap_begin_get(void)
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// {
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// return HEAP_BEGIN;
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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 HEAP_END;
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// }
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#endif /* !USING_MAX_HEAP_SIZE*/
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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(void)
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{
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// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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/* System Tick Configuration */
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_SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
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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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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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/* USART driver initialization is open by default */
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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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/* 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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}
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long reboot(void)
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{
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Flash_Set_WorkDuration(work_duration);//重启前保存参数
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NVIC_SystemReset(); // 直接重启系统
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return 0;
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}
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FINSH_FUNCTION_EXPORT(reboot, reboot the board);
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MSH_CMD_EXPORT(reboot, reboot the board);
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void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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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->SR = 0;
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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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#if 0
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// 参考：[001] [RT-Thread 学习笔记] 高精度延时函数 rt_hw_us_delay 的陷阱与优化
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// https://blog.csdn.net/kouxi1/article/details/122581857
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// 其中入口参数 us 指示出需要延时的微秒数目，这个函数只能支持低于 1 OS Tick 的延时。
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// 可以支持≥ 1 os tick 的延时时间！但是不建议这样使用
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// ，如果需要延时时间≥ 1 os tick，请使用 rt_thread_delay() 或 rt_thread_mdelay 函数
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void rt_hw_us_delay(rt_uint32_t us)
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{
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rt_uint32_t ticks;
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rt_uint32_t told, tnow, tcnt = 0;
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rt_uint32_t reload = SysTick->CMP;
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/* 获得延时经过的 tick 数 */
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ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
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/* 获得当前时间 */
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told = SysTick->CNT;
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while (1)
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{
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/* 循环获得当前时间，直到达到指定的时间后退出循环 */
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tnow = SysTick->CNT;
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if (tnow != told)
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{
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if (tnow < told)
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{
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// 取决于 SysTick->CNT 递增或递减
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// 通过一个 tcnt 变量将当前计数值 tnow 与上一时刻的计数值 told 的差值进行累加（注意 SysTick->VAL 为递减还是递增计数器）
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// ，当累加值 tcnt≥延时节拍 ticks 时跳出循环，而 tcnt 最大值为 0xffff ffff，不可能出现死循环的情况
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tcnt += told - tnow; // SysTick 递增的话
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//tcnt += reload - told + tnow; // SysTick 递减的话
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}
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else
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{
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tcnt += reload - tnow + told; // SysTick 递增的话
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//tcnt += tnow - told; // SysTick 递减的话
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}
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told = tnow;
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if (tcnt >= ticks)
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{
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break;
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}
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}
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}
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}
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#endif
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