blocks|key|1823393|text|你可以用HAL_GetTick():+this+function+gets+current+SysTick+counter+value+(incremented+in+SysTick+interrupt)+used+by+peripherals+drivers+to+handle+timeouts.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1823394|entityMap^0|4|42|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

You could use <code>HAL_GetTick(): this function gets current SysTick counter value (incremented in SysTick interrupt) used by peripherals drivers to handle timeouts.</code>

blocks|key|1069939|text|SysTick是为此目的提供的ARM核心外围设备。根据您的需要调整如下：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1069940|首先，初始化它|1069941|//+Initialise+SysTick+to+tick+at+1ms+by+initialising+it+with+SystemCoreClock+(Hz)/1000

volatile+uint32_t+counter+=+0;
SysTick_Config(SystemCoreClock+/+1000);|code-block|syntax|javascript|1069942|提供中断处理程序。您的编译器可能需要使用附加属性来修饰中断处理程序。|1069943|SysTick_Handler(void)+{
++counter%2B%2B;
}|1069944|下面是您的millis()函数，非常简单：|1069945|uint32_t+millis()+{
++return+counter;
}|1069946|一些需要注意的注意事项。|1069947|SysTick是一个24位计数器。它会被溢出。当您比较值或实现延迟方法时，请注意这一点。|ordered-list-item|1069948|SysTick是从处理器核心时钟导出的。如果你扰乱核心时钟，例如放慢它的速度以节省电力，那么SysTick的频率也必须手动调整。|1069949|entityMap^0|0|7|0|0|0|0|0|5|8|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|18|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|S|3|T|5|J|7|1D|8|@]|D|@]|E|$K|L]]|$1|U|3|V|5|6|7|1E|8|@]|D|@]|E|$]]|$1|W|3|X|5|Y|7|1F|8|@]|D|@]|E|$]]|$1|Z|3|10|5|Y|7|1G|8|@]|D|@]|E|$]]|$1|11|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]]|12|$]]

<code>SysTick</code> is an ARM core peripheral provided for this purpose. Adapt this to your needs:

Firstly, initialise it

<pre><code>// Initialise SysTick to tick at 1ms by initialising it with SystemCoreClock (Hz)/1000

volatile uint32_t counter = 0;
SysTick_Config(SystemCoreClock / 1000);
</code></pre>

Provide an interrupt handler. Your compiler may need interrupt handlers to be decorated with additional attributes.

<pre><code>SysTick_Handler(void) {
 counter++;
}
</code></pre>

Here's your <code>millis()</code> function, couldn't be simpler:

<pre><code>uint32_t millis() {
 return counter;
}
</code></pre>

Some caveats to be aware of.

<ol>
<li>SysTick is a 24 bit counter. It will wrap on overflow. Be aware of that when 
you're comparing values or implementing a delay method.</li>
<li>SysTick is derived from the processor core clock. If you mess with the core clock, for example slowing it down to save power then the SysTick frequency must be manually adjusted as well.</li>
</ol>

blocks|key|940291|text|在某些情况下，您可能不会为此目的使用SysTick。例如，当使用FreeRTOS时，它已经实现了SysTick。在本例中，在任务中运行代码，您可以使用vTaskDelay。根据您想要做的事情，软件定时器还可以完成以下操作：http://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|940292|如果您不能使用SysTick，并且您没有FreeRTOS或类似的，您可以设置一个带有中断的计时器，并将您的代码放在适当的回调中。|940293|entityMap|0|LINK|mutability|MUTABLE|url|http://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html^0|33|1U|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

In some situations you may not use SysTick for this purpose. For example when using FreeRTOS, which already implements SysTick. In this case, run your code in a task, and you can use vTaskDelay. Depending on what you would like to do, a software timer can also make the trick: <a href="http://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html" rel="nofollow noreferrer">http://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html</a>

In case you cannot use SysTick, and you don't have FreeRTOS or similar, you can setup a Timer with an interrupt and place your code in the appropriate callback.

blocks|key|1823511|text|好吧，我想我需要更多的信息来得到一个正确的答案，但我会给你我最好的机会。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1823512|如果您正在进行高分辨率测量(需要精确的时间)，您需要为您的应用程序提供一个外部晶体，因为MCU的内部时钟并不十分精确。|1823513|考虑到这一点，你要做的是：|1823514|配置一个TIM，这样它可以每隔1ms执行一次中断。|ordered-list-item|1823515|启动蒂姆的中断，|1823516|在TIM中断中，增加一个计数器(这将是您的时间)，该计数器被定义为该模块的全局变量。|1823517|void+interrupt+TIMX_interrupt(void){+counter%2B%2B;+//+this+will+have+the+time+count+in+MS.++}|offset|length|style|CODE|1823518|创建一个名为millis()的函数，返回计数器，如下所示：|1823519|uint32_t+millis(void){++return+counter;+}|1823520|这样，您就可以在这个MCU中使用相同的功能。|1823521|entityMap^0|0|0|0|0|0|0|0|2I|0|6|8|0|0|15|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|H|7|14|8|@]|9|@]|A|$]]|$1|K|3|L|5|H|7|15|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|16|8|@$O|17|P|18|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|H|7|19|8|@$O|1A|P|1B|Q|R]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1C|8|@$O|1D|P|1E|Q|R]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|Z|$]]

Well, I think I need more information for a proper answer, but I will give you my best shot.

A consideration you need to have for your application, if you are making a high resolution measurements (need exact time), you will need to provide an external crystal for the accuracy since the internal clocks of the MCU are not quite accurate. 

Having that in mind, what you shall do is the following:

<ol>
<li>Configure a TIM so it can execute an interruption every 1ms</li>
<li>Enable the TIM interrupt,</li>
<li>In the TIM interrupt, increase a counter ( this will be your time) that is defined as a global variable for this module. </li>
</ol>

<code>void interrupt TIMX_interrupt(void){
counter++; // this will have the time count in MS. 
}</code>

<ol start="4">
<li>Create a Function named <code>millis()</code> that return the counter something like:</li>
</ol>

<code>uint32_t millis(void){
 return counter;
}</code>

In this way you could use the same function in this MCU.

blocks|key|938679|text|我建议用计时器来做。这样你也可以得到1U的步长，只需控制你的时间步长。无论如何，大多数的STM32单片机有8个或更多的计时器，所以在大多数情况下，你可以自由地拿一个。我将展示非常简单的基本概念，如何去做。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|938680|只需创建计时器：|938681|uint32_t+time+=+0;

void+enable_timer(void){
++++RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16,+ENABLE);
++++TIM_TimeBaseInitTypeDef+timerInitStructure;

++++/*+if+MCU+frequency+48+MHz,+prescaler+of+value+48+will+make+1us+counter+steps
++++timerInitStructure.TIM_Prescaler+=+48;

++++timerInitStructure.TIM_CounterMode+=+TIM_CounterMode_Up;
++++/*how+often+you'll+get+irq*/
++++timerInitStructure.TIM_Period+=+0xFFFF;+//+will+get+irq+each+65535us+on+TIMx->CNT+overflow
++++timerInitStructure.TIM_ClockDivision+=+TIM_CKD_DIV1;
++++TIM_TimeBaseInit(TIM16,+&timerInitStructure);
++++TIM_Cmd(TIM16,+ENABLE);
++++NVIC_InitTypeDef+NVIC_InitStruct;
++++NVIC_InitStruct.NVIC_IRQChannel+=+TIM16_IRQn;
++++/*for+more+accuracy+irq+priority+should+be+higher,+but+now+its+default*/
++++NVIC_InitStruct.NVIC_IRQChannelPriority+=+0;
++++NVIC_InitStruct.NVIC_IRQChannelCmd+=+ENABLE;
++++TIM_ClearITPendingBit(TIM16,TIM_IT_Update);
++++NVIC_Init(&NVIC_InitStruct);
++++TIM_ITConfig(TIM16,TIM_IT_Update,ENABLE);
}|code-block|syntax|javascript|938682|在IRQ，您必须控制计时器计数器的溢出，并更新您的全局时间。|938683|void+TIM16_IRQHandler(void){
if+(TIM_GetITStatus(TIM16,+TIM_IT_Update)+!=+RESET){
++++TIM_ClearITPendingBit(TIM16,+TIM_IT_Update);
++++time+%2B=65535;
}|938684|}|938685|实时将是：|938686|uint32_t+real_time_us+=+time+%2B+(uint32_t)TIM16->CNT;|938687|但是如果你可以自由使用32位计时器，你甚至可以不使用IRQ，只需使用time=+TIMx->CNT即可。是的，它取决于计时器配置和您的需要，您还必须知道uint32_t时间变量也可能溢出，但这是一个细节，它可以很容易地管理。|938688|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

I would suggest to do it with timer. In this way you also can get 1us step, just control your time step size. Anyway most of STM32 MCU's has 8 or more timers, so in most cases you are free to take one.
I'll show very simple basic idea how to do it.

Just create timer:

<pre><code>uint32_t time = 0;

void enable_timer(void){
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
 TIM_TimeBaseInitTypeDef timerInitStructure;

 /* if MCU frequency 48 MHz, prescaler of value 48 will make 1us counter steps
 timerInitStructure.TIM_Prescaler = 48;

 timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
 /*how often you'll get irq*/
 timerInitStructure.TIM_Period = 0xFFFF; // will get irq each 65535us on TIMx-&gt;CNT overflow
 timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
 TIM_TimeBaseInit(TIM16, &amp;timerInitStructure);
 TIM_Cmd(TIM16, ENABLE);
 NVIC_InitTypeDef NVIC_InitStruct;
 NVIC_InitStruct.NVIC_IRQChannel = TIM16_IRQn;
 /*for more accuracy irq priority should be higher, but now its default*/
 NVIC_InitStruct.NVIC_IRQChannelPriority = 0;
 NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
 TIM_ClearITPendingBit(TIM16,TIM_IT_Update);
 NVIC_Init(&amp;NVIC_InitStruct);
 TIM_ITConfig(TIM16,TIM_IT_Update,ENABLE);
}
</code></pre>

at IRQ you have to control overflows of timer counter and update your global time

<pre><code>void TIM16_IRQHandler(void){
if (TIM_GetITStatus(TIM16, TIM_IT_Update) != RESET){
 TIM_ClearITPendingBit(TIM16, TIM_IT_Update);
 time +=65535;
}
</code></pre>

}

And real time will be :

<pre><code>uint32_t real_time_us = time + (uint32_t)TIM16-&gt;CNT;
</code></pre>

But if you are free to use 32 bit timer you can even do it without IRQ, just simply time= TIMx->CNT. Yea it depends on timer configuration and your needs, also you have to know that uint32_t time variable also can overflow, but that's a details, it can be managed easily.

blocks|key|940402|text|我建议设立你自己的计时器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|940403|要制作定时器，必须在CubeMX或手动中配置预标量和句点。|940404|时钟配置|offset|length|940405|因为我的时钟是72+1MHz，这意味着我想要72+1MHz+/1+1MHz+1=+71的预标量，因此我的周期是1+1MHz/1+1kHz+1=+999，因为我希望每1毫秒触发一次中断。|940406|预标量计算|940407|在CubeMX中，这是怎么看的。|940408|定时器配置|940409|然后，要在计时器回调函数中添加一个计数器增量。|940410|void+HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef+*htim)
{
++/*+USER+CODE+BEGIN+Callback+0+*/
++if+(htim->Instance+==+TIM10)+{
++++counter%2B%2B;
++}
++/*+USER+CODE+END+Callback+0+*/
++if+(htim->Instance+==+TIM1)+{
++++HAL_IncTick();
++}
++/*+USER+CODE+BEGIN+Callback+1+*/

++/*+USER+CODE+END+Callback+1+*/
}|code-block|syntax|javascript|940411|entityMap|0|LINK|mutability|MUTABLE|url|https://i.stack.imgur.com/W6rBp.png|1|https://i.stack.imgur.com/fOrzJ.jpg|2|https://i.stack.imgur.com/YOl5W.png^0|0|0|0|4|0|0|0|0|5|1|0|0|0|5|2|0|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|19|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1A|8|@]|9|@$F|1B|G|1C|1|1D]]|A|$]]|$1|H|3|I|5|6|7|1E|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1F|8|@]|9|@$F|1G|G|1H|1|1I]]|A|$]]|$1|L|3|M|5|6|7|1J|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1K|8|@]|9|@$F|1L|G|1M|1|1N]]|A|$]]|$1|P|3|Q|5|6|7|1O|8|@]|9|@]|A|$]]|$1|R|3|S|5|T|7|1P|8|@]|9|@]|A|$U|V]]|$1|W|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|Z|10|11|A|$12|15]]|16|$5|Z|10|11|A|$12|17]]]]

I would suggest setting up your own timer.

To make a timer you must configure a prescalar and period in CubeMX or manually. 
<a href="https://i.stack.imgur.com/W6rBp.png" rel="nofollow noreferrer">Clock Configuration</a>

Because my clock is 72MHz this means I want a prescalar of 72MHz / 1MHz - 1 = 71
Consequently my period will be 1MHz / 1kHz - 1 = 999 because I want the interrupt to trigger once every 1 millisecond. 
<a href="https://i.stack.imgur.com/fOrzJ.jpg" rel="nofollow noreferrer">Prescalar Calculation</a>

Here is how that looks in CubeMX. 
<a href="https://i.stack.imgur.com/YOl5W.png" rel="nofollow noreferrer">Timer Configuration</a>

Then you want to add a counter increment in the timer callback function.

<pre><code>void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
 /* USER CODE BEGIN Callback 0 */
 if (htim-&gt;Instance == TIM10) {
 counter++;
 }
 /* USER CODE END Callback 0 */
 if (htim-&gt;Instance == TIM1) {
 HAL_IncTick();
 }
 /* USER CODE BEGIN Callback 1 */

 /* USER CODE END Callback 1 */
}
</code></pre>

blocks|key|1823637|text|你需要先初始化SysTick，用SystemCoreClock+(Hz)/1000初始化1ms。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1823638|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You need to initialise SysTick first, to tick at 1ms by initialising it with SystemCoreClock (Hz)/1000.

blocks|key|1070288|text|HAL库使用计时器(可以在STM32CubeMX中选择它)来生成滴答计数器。每只蜱虫都需要1ms。您可以使用它来度量经过的时间，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1070289|+++uint32_t+startTime+=+HAL_GetTick();
++++++++++++++++.
++++++++++++++++.
++++++++++++++++.
+++uint32_t+endTime+=+HAL_GetTick();
+++uint32_t+elapsedTime+=+endTime-startTime;+//+in+ms+|code-block|syntax|javascript|1070290|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

HAL library use a Timer(you can select it in the STM32CubeMX) to generate a Tick counter. every Tick takes 1ms. you can use it as follow to measure elapsed time:
<pre><code> uint32_t startTime = HAL_GetTick();
 .
 .
 .
 uint32_t endTime = HAL_GetTick();
 uint32_t elapsedTime = endTime-startTime; // in ms 
</code></pre>

I am trying to port some Arduino library to stm32. In Arduino, <code>millis()</code> returns the number of milliseconds since boot. Is there an equivalent function in stm32? I am using stm32f0 MCU.

Arduino millis() in stm32

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在尝试将一些Arduino库移植到stm32。在Arduino中，millis()返回自引导以来的毫秒数。在stm32中有等效的函数吗？我使用的是stm32f0单片机。

问Arduino millis()在stm32中
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