rs232c trouble

[sotokun]

I use rs232c@4.19MHzPIC16F877 with CCSC Ver3.185 now.
But It can't work well my code follows;

#use delay(CLOCK = 4190000)
#USE RS232(BAUD=38400 ,XMIT=SioXmit ,RCV=SioRcv , INVERT)

I checked a timing of one pulse. It was short.

So I chenged my code like this;

#use delay(CLOCK = 4350000)
#USE RS232(BAUD=38400 ,XMIT=SioXmit ,RCV=SioRcv , INVERT)

Then,it work well.

Anyone tell me why?

[dyeatman]

Can we assume by the starting sentence you are using a 4.19MHZ Xtal or Resonater?

You evidently have timing calculation issues. You need to post the complete section of the code that calculates the timing and outputs the pulses for anyone to be able to help you here.