PIC16F877A :serial communication problem

[Moustafa]

pic16f877a serial communication

dear all
I am using the pic 16f877a to make serial comm. with the PC via RS232
also i use MicroC c-compiler and the code as follows
when i tried the hyperterminal it does not receive any thing from PIC
the program is simple : send character from computer to PIC so PIC sends it back
i connected the
pin 25 :RC6 to pin 11 in max232
pin 25 :RC7 to pin 12 in max232
max232 :
Pin 13 to pin 3 in serial cable Tx
pin 14 to pin 2 in serial cable RX

unsigned short i;
void main(){
  Usart_Init(19200);
  Delay_ms(100);
   while(1){
           if (Usart_Data_Ready()) {   // If data is received
            i = Usart_Read();        // Read the received data
            Usart_Write(i);          // Send data via USART
            Delay_80us();
           }          
  }
}

can anyone help me in this problem ?
thanks

 

[hill]

serial communication pic16f877a

What is the compiler you're using?

 

[Moustafa]

pic16f877a serial

it is microC from a compay callled mikroElektronika

 

[hill]

micro c usart_write

Did you check the manual to see what actually is done inside Usart_Write() ? The reason I ask is it was not clear if that function check TMIF before writting to TXREG.

 

[janakiram.sistla]

usart_write

hi
check whether u connection b/w pic and pc are reversed or not first

 

[Moustafa]

serial communication problem with pic16f877a

thanks
i checked the connection again and i know the problem , it was the serial cable connection : i use the male pin cnfiguration insted of the female to know the RX,TX,..

Did you check the manual to see what actually is done inside Usart_Write() ? The reason I ask is it was not clear if that function check TMIF before writting to TXREG

about the compiler i saw the generated assembly and it does that check.
thanks again for responses