RCIF不会变为零

大家好！我在一个接收USAT数据的程序中工作。我不需要使用中断。目的是通过监视RCIF位来保持一个循环。当它被设置时，我将处理每一个收到的字节。从我理解的USAT中，每次读取RCREG时，RCIF位都被清除，然后我返回到循环的开始，等待一个新字节。这就是问题所在！RCIF位不会达到0！我已经做了所有的事情…我尝试读RCREG几次，我尝试零RCIF直接（PrI1BITS RCIF＝0），但没有什么导致RCIF到零！……（）PiL1ReC= GETCUTART（）；PutsCART（BytEyReC）ReD1=！LeD1……正在发生的事情是RCIF一直被清除。有人会对什么是错误的有什么建议吗？附加信息：C18汇编语言18F2520非常感谢蚂蚁提示。



      以下为原文

    Hello guys!

I am working in a program that receives USART data. I do not need to use the interrupt. The intent is to stay in a loop by monitoring the RCIF bit. When it's set, I'll handle every received byte. From what I understand from USART, every time I read RCREG the RCIF bit is cleared and then I go back to the beginning of the loop to wait for a new byte. That's the problem! The RCIF bit is not going to 0! I've done everything ... I try read RCREG several times, I try to zero RCIF directly (PIR1bits.RCIF = 0) but nothing causes RCIF to go to zero!


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while (! PIR1bits.RCIF);

byte_rec = getcUSART ();
putcUSART (byte_rec)
LED1 =! LED1

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What is happening is that RCIF is kept cleared all the time.


Would anyone have any tips on what could be wrong?


Additional Information:

C18 compiler

PIC18F2520

Thanks so much for ant hint.