RS232 Dosn't work on PIC18F4520 Development Kit

[Guest]

Can't seem to get the Rs232 port to work correctly. I have the CCS PIC18F4520 Development Kit (prototype board).

The following code will compile and execute, but I don't get the results I expect. Using Hyperminal (9600-N-1-8) with the supplied CCS RS232 cable, I can run the program and the GREEN LED turns on and waits for a kbhit. So far so good. Then I tap any key on the heyboard and the YELLOW LED turns on. Great ! But the key that I tap is not the ASCII data I see in the debugger ( variable char c). I get garbage. Also... nothing on the Hyperterminal screen (I guess since the data is garbage and non printable).

I have also tried using printf putc, etc. No luck.

It's gotta be something simple. Any suggestions ?

Marc

Here's the C code:

#include "main.h"
#define GREEN_LED PIN_A5
#define YELLOW_LED PIN_B4
#define RED_LED PIN_B5

void main()
{

char c;

c = 'K';
output_low(GREEN_LED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);

while(TRUE)
{
if(kbhit(L1) )
{
output_low(YELLOW_LED);
c = getc(L1);
fputc('D',L1);
}
}
}

// HERE'S My Inlcude File
/****************************************
#include <18F4520.h>
#device ICD=TRUE
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES LP //Low power osc < 200 khz
#FUSES NOPROTECT //Code not protected from reading
#FUSES BROWNOUT //Reset when brownout detected
#FUSES BORV20 //Brownout reset at 2.0V
#FUSES NOPUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES LVP //Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FCMEN //Fail-safe clock monitor enabled
#FUSES PBADEN //PORTB pins are configured as analog input channels on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES NOCPB //No Boot Block code protection
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES MCLR //Master Clear pin enabled
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)

#use delay(clock=20000000,RESTART_WDT)
#use rs232(stream=L1,baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
*************************************/

[PCM programmer]