Eusart Interrupt Routine Circular Buffer

[babos 0]

I need to understand how write a program to do this things with PIC18f8722@25MHz :

 

1) How Setting the Usart (1 or 2) to work at 115.200BRate or other BRates.

2) How make a circular buffer of 256 bytes that fill in interrupt by receive chars trought Usart->RX pin asynch.

3) How, when a special chars at the end of circular buffer exist, I can send ALL string trought Usart->TX pin asynch (even in interrupt).

 

I try to migrate from PicBasicPro to SourceBoostC but with more difficulty.

 

 

Sorry for language.

 

There is an angel to help me ???? Thank's so much!!!!

 

:angry: