如何以微秒为单位计算时间pic18f4550

嗨，在ARDUNO中有一个名为MICROSH（）的函数，它从程序开始运行起，计算微秒的时间。我一直在尝试使用PIC18F45来使用time0，我使用了一个64 MHz的晶体，1:2的预分频器，8位的模式，和定义的TMR0＝248，每次中断被调用。根据我的数学，这会给我1个，直到溢出。由于某种原因，我的程序一直被困在中断中。我创建了ANIF（计数-lSTyTime＆Gt；10）-&；在我的while循环中切换PORTB，但是使用.COF文件在proteus ISIS中模拟它，我发现我的程序没有运行切换部分，它一遍又一遍地调用中断。你知道为什么吗？另外，还有别的办法吗？我需要运行一系列指令每22个美国（44100赫兹音频采样），所以我真的需要一个解决方案，以微秒的时间计数，即使这意味着使用另一个PIC设备！提前感谢！



      以下为原文

    Hi.

There's a function named micros() in Arduino that counts time in microseconds since The program started running. I've been trying to do that using timer0 with pic18f4550, I've used a 64 MHz Crystal, 1:2 prescaler, 8 bit mode, and defined TMR0 = 248 every time the interrupt is called. Acording to my math, that would give me 1 us until The overflow. For some reason, my program is stuck in The interrupt The whole time. I've created an
If(count - last_time > 10) -> toggle PORTB
in my while loop, but simulating it in proteus Isis using The .cof file, I've found out that my program is not running The toggle part, it's calling The interrupt over and over again. Do you have any Idea why?

Also, is there another way to do that? I Need to run a series of instructions every 22 us ( 44100 Hz audio sampling ), so I really Need a solution to count time in microseconds, even If that means using another pic device!

Thanks in advance!