请问while循环需要多少个时钟

1.有一个自由运行的时钟;
2.延迟执行时间戳。
这样的事情会起作用：
//得到时间戳
＆amp; sharpdefine tick_get（）（TIM2-> CNT）// TIM2初始化为自由运行时钟
//延迟多个周期
void delay（uint16_t cnt）{
 uint16_t start_time = tick_get（）; //时间戳记例程的开始
 while（tick_get（） - start_time＆lt; cnt）继续; //等到所需的周期数已经过去
}
当你想延迟一定数量的我们或ms时，只需用正确的周期数来喂它。
上面的代码是阻塞的。非阻塞版本将是这样的：
//测试是否已经过了多个周期
char isdelay（uint16_t cnt）{
 static uint16_t start_time = 0; //为例程的上一个开始添加时间戳
 if（tick_get（） - start_time＆lt; cnt）返回0; //未指定周期数
 start_time + = cnt; //增加start_time
 返回1; //表示已经过了设定的周期数
}



以下为原文




1. have a free-running clock;
2. time stamp your execution for delays.
something like this would work:
//get time stamp
&sharpdefine tick_get()  (TIM2->CNT)  //TIM2 initialized as a free running clock
//delay a number of cycles
void delay(uint16_t cnt) {
  uint16_t start_time = tick_get(); //time stamp the start of the routine
  while (tick_get() - start_time < cnt) continue; //wait until the desired number of cycles has passed
}
when you want to delay a certain amount of us, or ms, just feed it with the right number of cycles.
the code above is blocking. a non-blocking version would be something like this:
//test if a number of cycles has passed
char isdelay(uint16_t cnt) {
  static uint16_t start_time = 0; //time stamp the previous start of the routine
  if (tick_get() - start_time < cnt) return 0; //the number of cycles specified has not passed
  start_time += cnt;  //increment start_time
  return 1;  //indicating that the set number of cycles has passed
}

谢谢。它是否适用于8位MCU，最大时钟为16 MHZ？
我用过的东西是这样的：
void delay_us（unsigned int d）
 
{
 
TIM5-＆GT; CNT = 0;
而（TIM5-＆GT; CNT＆LT; d）;
并且TIM5-> CNT每1us计数一次（TIM5时钟为1MHz）。
这在CPU时钟为120 MHz（当我使用我的stm32f217 MCU时）时有效。
但是当我使用16MHz CPU时钟的相同设置时，这不起作用（我在stm32f217和stm8s中尝试过这个）。
 
 注意：原始帖子包含大量线程对话，只能迁移到第9级



以下为原文




Thanks. Does it work with 8-bit MCUs that the maximum clock is 16 MHZ?
Something that I used was this:
void delay_us(unsigned int d)

{

TIM5->CNT=0;
while(TIM5->CNT }And TIM5->CNT counts every 1us(TIM5 clock is 1MHz).
This works when the CPU clock is 120 MHz(When I'm using my stm32f217 MCU).
But when I use the same settings with 16MHz CPU clock this does not work(i tried this in both stm32f217 and stm8s that I have).

Note: the original post contained a large number of threaded conversations and was only able to be migrated to the 9th level