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Software Uart problem with pic16f877a

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abilashjoseph

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Hi all,

i am using pic 16f877a and CCS compiler,

i am tried for a software uart. it work properly in Proteus and oshonsoft simulator.

but in board transmit section is ok but reception is not working.
receive will get only null.

like " you entered : [ ]"
no character appear there.

the code is given below

HTML:
#include <16f877a.h>
//#device adc=8
                   
#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOPUT                    //No Power Up Timer
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD                    //No EE protection
#FUSES NOWRT                    //Program memory not write protected
#FUSES NODEBUG                  //No Debug mode for ICD
#FUSES NOPROTECT                //Code not protected from reading

#use delay(clock=20000000,RESTART_WDT)
                         
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,errors,stream=HOSTPC,RESTART_WDT)
#use rs232(baud=9600,parity=N,xmit=PIN_C4,rcv=PIN_C5,bits=8,errors,stream=FPM)
                                          



void main()
{
char a=0;
 while(1)
 {
 fprintf(FPM,"Press any key\r\n");
 
  a= getch(FPM); 
  
 fprintf(FPM,"You entered : [%C]\r",a);
  
 }

}

please give a solution ASAP




Thanks

the oshonsoft simulation image:

 

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