PIC16f877 UART problem

[Diego]

hello, sorry for my english...

I have a problem using the serial RX for the PIC16f877, the code will be captured and return a char send by the serial com of my pc; always the PIC send a 0x00. The same code with the PIC16f873 works 'ok'; Using Proteus works ok too. Thank's for your help. The code is:

#include <16F877A.h>
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES NOPUT //No Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES BROWNOUT //Reset when brownout detected
#FUSES NOLVP //Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected

#use delay(clock=12000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,enable=PIN_C5)

#byte Port_B=6
#byte Port_A=5
#byte Port_C=7
#byte Port_D=8
#byte RCReg=0x1A
#byte RCSta=0x18
#byte PIR1=0x0C
#bit RCIF = 0x0C.5

char buffer;

#int_rda
Rda_ISR()
{
if(kbhit()){
buffer=getc();
putc(buffer);
}
}

void main()
{

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_counters(RTCC_INTERNAL,WDT_288MS);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
set_tris_c(0b11000000);
port_c=0;
enable_interrupts(INT_RDA);
printf("Inicio"); //this line works ok.
enable_interrupts(GLOBAL);

while(1){

restart_wdt();
}
}

[MikeValencia]

I've printf'ed several times from an '877 in the past. Try the code below. It works with a picdem-2 demo board hooked and Hyperterminal. (Actually this code is cut and pasted from an 18F458, and i don't have PCM, just PCH).