如何计算比较器过零点的高电平输出数量，但仅持续1秒？

这里有一种方法
将比较器总线连接到8位或16位计数器的时钟。基于8秒或16位之间的交叉选择脉冲数。使用ADuffWrreEdIn函数将计数器初始化为0xFF或0xFFFF。配置另一个计数器1秒。例如，您可以使用一个16位计数器，周期为32000，时钟为32 K，或者任何这样的组合。启用该计数器的终端计数中断。让我们调用这个时基，启动时基计数器，使它的中断在时基计数器的中断内启动主计数器，启动主计数器，读取其计数值，并从0xFF或0xFFFF中减去它。这将给你在第二次过零的次数。最好的问候，甘尼什



     以下为原文
  Here is one method
   

    

• Connect the Comparator bus to the Clock of an 8 bit or 16 bit counter.  Choose between 8 bit or 16 bit based on the number of Zero Crossing pulses you expect in a second.    
  
• Initialize the counter to to 0xFF or 0xFFFF using the Counter_WritePeriod function.    
  
• Configure another counter for a period of 1 second.  For example, you can use a 16 bit counter with a period of 32000 and clock of 32K or any such combination.  Enable the terminal count interrupt of this counter. Let us call this TimeBase    
  
• Start the TimeBase counter and enable its interrupt    
  
• Start the main counter    
  
• Inside the interrupt of the TimeBase counter, start the main counter, read its count value and subtract it from 0xFF or 0xFFFF.  That will give you number of Zero Crossings in a second.   
  

   
Best Regards,
Ganesh

这个项目，我不知道它是正确的…你能看到它吗？
当做
测试11ZIP
260.9 K



     以下为原文
  I did this project, I do not know if it is right .. Can you see it please?
    regards

•   test11.zip 260.9 K  
  
  

你的项目有些问题。1。当你设置时钟同步参数使用SysCLK直接时，它重写时钟输入，并使24MHz IMO作为时钟到达数字块。因此，在您的项目中，计数器和计时器都将运行在24MHz。正确的时钟同步参数是SycToSysCLK 2。TimeReN..ASM文件是一个汇编文件。不能在该文件中写入C代码。相反，在C中在C中编写ISR，用Y.PrimaBaseTracl处理程序将其声明为中断处理程序，然后将LJMP放置到TimeReTim.ASM文件中的ISR中。我已经修改了上面的项目，并增加了一个LCD来显示读取值。如果您有一个与LCD连接到PART2的合适的板，您可以使用它来测试项目。然而，我还没有测试这个项目。最好的问候，甘尼什
PROFAIR比较表
80.8 K



     以下为原文
  There were some problems with your project.

1. When you set the clocksync parameter to Use Sysclk Direct, it overrides the Clock input and makes 24MHz IMO as the clock to the digital block.  So, in your project, both the counter and timer will be running at 24MHz.  The correct clock sync parameter is SyncToSysclk
2. TimerINT.asm file is an assembly file.  You cannot write C code inside this file.  Instead, write your ISR in C in main.c, declare it as interrupt handler using #pragma interrupt_handler and then place an ljmp to this ISR inside the TimerINT.asm file.

I have modified the project with the above and have added an LCD to display the read value.  If you have a suitable board with an LCD connected to Port2, you can use this to test the project.  However, I have not tested the project.

Best Regards,
Ganesh

•   prova_comparatore_contatore2.zip 80.8 K  
  
  

谢谢！
汽车旅馆，谢谢你。
也许你可以通过转换，首先，类比数字，并在主文件后写？



     以下为原文
  thanks!
     I now try, and I tell you, thanks. 
    maybe you can save space by converting, first, analog to digital, and after write code in main?