关于STM32 时钟安全系统 (CSS)的疑惑

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关于STM32 时钟安全系统 (CSS)的疑惑,第1张

//定时100毫秒，在定时中断中将LED的相应管脚依次拉低或置高就可以了，这里是定时器配置，

//中断函数应该会写吧*_*

void Timer_Config(void)

{

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE)

TIM_DeInit(TIM2)

TIM_TimeBaseStructure.TIM_Period=1000//自动重装载寄存器周期的值(计数值)

TIM_TimeBaseStructure.TIM_Prescaler= (7200 - 1)//时钟预分频数

TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1//采样分频

TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up//向上计数模式

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure)

TIM_ClearFlag(TIM2, TIM_FLAG_Update)//清除溢出中断标志

TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE)

TIM_Cmd(TIM2, ENABLE)//开启时钟

}

我这里有一段js动态时钟的代码，日历的比较复杂，没有研究：

<scripttype="text/javascript">

setInterval(function() {

var week

var date

var today = new Date()

var year = today.getFullYear()

var month = today.getMonth() + 1

var day = today.getDate()

var ss = today.getDay()

var hours = today.getHours()

var minutes = today.getMinutes()

var seconds = today.getSeconds()

date = year + "年" + month +"月" + day + "日 "

if (ss == 0) week = "星期日"

if (ss == 1) week = "星期一"

if (ss == 2) week = "星期二"

if (ss == 3) week = "星期三"

if (ss == 4) week = "星期四"

if (ss == 5) week = "星期五"

if (ss == 6) week = "星期六"

if (minutes <= 9) minutes ="0" + minutes

if (seconds <= 9) seconds ="0" + seconds

document.getElementById('p_time').innerHTML = "今天是：" + date

+ week + " " + hours + ":" + minutes + ":" +

seconds

},

1000)

</script>

这里一定要注意，html里要有一个id为p_time的div。

css 有个 animation 可以实现动画，仅仅是动起来，没法实现实时与系统对时（需要js）

60秒跳动60次旋转360度。（可以使用linear 线性运动）

# animation:anim_mm 60s linear infinite

animation:mm 60s steps(60) infinite

@keyframes mm{

to{ transform:rotate(360deg) }

}