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70 lines
2.2 KiB
70 lines
2.2 KiB
/*********************************************************
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*Copyright (C), 2017, Shanghai Eastsoft Microelectronics Co., Ltd.
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*文件名: systick.c
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*作 者: AE Team
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*版 本: V1.00
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*日 期: 2021/05/13
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*描 述: 系统滴答模块程序
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*备 注: 本软件仅供学习和演示使用，对用户直接引用代码所带来的风险或后果不承担任何法律责任。
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**********************************************************/
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#include "systick.h"
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extern uint32_t g_sys_sick;
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/*********************************************************
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函数名: void User_SysTickInit(void)
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描 述: 系统滴答初始化：100us
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输入值: 无
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输出值: 无
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返回值: 无
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如果配置1ms(重装载值48000)
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**********************************************************/
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void User_SysTickInit(void)
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{
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SYSTICK_InitStruType x;
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// x.SysTick_Value = SystemCoreClock / 10000;//重装载值4800(SystemCoreClock=48M)
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// x.SysTick_ClkSource = SysTick_ClkS_Cpu;//时钟48M
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// x.SysTick_ITEnable = Enable;
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// SysTick_Init(&x);//现在滴答定时器时钟用的48M，重装载值4800 t=1s/f(f=48M/4800)
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x.SysTick_Value = SystemCoreClock / 1000;
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x.SysTick_ClkSource = SysTick_ClkS_Cpu;//时钟48M
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x.SysTick_ITEnable = Enable;
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SysTick_Init(&x);//现在滴答定时器时钟用的48M，重装载值4800 t=1s/f(f=48M/48000)
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SysTick_Disable();
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}
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//采用滴答定时器的时钟源，滴答定时器配置的是100us
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// extern uint32_t g_sys_sick;
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/**
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* @brief ticket辅助方法
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*/
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uint32_t get_sys_ticket(void) { return g_sys_sick; }
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uint32_t port_haspassedms(uint32_t ticket) {
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uint32_t nowticket = get_sys_ticket();
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if (nowticket >= ticket) {
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return nowticket - ticket;
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}
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return UINT32_MAX - ticket + nowticket;
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}
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void port_do_debug_light_state(void) {
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static uint32_t lastprocess = 0;
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static uint8_t debug_led_state = 1;
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if (port_haspassedms(lastprocess) > 1000) {
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lastprocess = get_sys_ticket();
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debug_led_state = !debug_led_state;
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port_debug_set(debug_led_state);
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}
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}
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void Delayms(__IO uint32_t nTime)
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{
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uint32_t TimingDelay = 0;
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TimingDelay = get_sys_ticket();
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printf("nTime%d\r\n",nTime);
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while (port_haspassedms(TimingDelay) <= nTime);
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}
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