Can't get to work the UART in PIC16f877

[Jean_Paul]

Hi guys

I used the pic16f873 for my project then I change the program to compile for my pic16f877a just the header but I can't get to work my uart on the pic16f877a. I sense the output and I read 0v all the time. what is happening.

My code is the following:

#include "E:\pictest\acelerometro877.h"
#include <stdio.h>
#include <string.h>

#define ADXL210_SCALING_FACTOR 10



void accelerometer_isr(void);
void accelerometer2_isr(void);
void accelerometer_init(signed int32 zerog, long ppg);
signed long accelerometer_read(void);


//global vars used to calculate G
long adxl_t1, adxl_t2,ad1,ad2;
long adxl2_t1, adxl2_t2,a2d1,a2d2;
short adxl_waiting_for_fall;
short adxl2_waiting_for_fall;


//global vars used calibrate
signed int32 adxl_zerog;
long adxl_ppg;
long ax1,ax2,a1x1,a1x2;
Union FTOB {
int8 b[2];
long lg;
};

void sendlong (union FTOB value) {
int count;
value.lg=ax1;
putc(value.b[1]);
putc(value.b[0]);

}

void sendlong1 (union FTOB value) {
int count;
value.lg=ax2;

putc(value.b[1]);
putc(value.b[0]);
}

void sendlong2 (union FTOB value) {
int count;
value.lg=a1x1;

putc(value.b[1]);
putc(value.b[0]);
}


void sendlong3 (union FTOB value) {
int count;
value.lg=a1x2;

putc(value.b[1]);
putc(value.b[0]);
}
#int_CCP1
//CCP1_isr()
void accelerometer_isr(void) {
static long adxl_last_rise;

if(adxl_waiting_for_fall) {
adxl_t1=CCP_1-adxl_last_rise;
setup_ccp1(CCP_CAPTURE_RE);
adxl_waiting_for_fall=FALSE;
} else {
adxl_t2=CCP_1-adxl_last_rise;
adxl_last_rise=CCP_1;
ad1=adxl_t1;
ad2=adxl_t2;

setup_ccp1(CCP_CAPTURE_FE);
adxl_waiting_for_fall=TRUE;
}
}

#int_CCP2
void accelerometer2_isr(void) {
static long adxl2_last_rise;

if(adxl2_waiting_for_fall) {
adxl2_t1=CCP_2-adxl2_last_rise;
setup_ccp2(CCP_CAPTURE_RE);
adxl2_waiting_for_fall=FALSE;
} else {
adxl2_t2=CCP_2-adxl2_last_rise;
adxl2_last_rise=CCP_2;
a2d1=adxl2_t1;
a2d2=adxl2_t2;

setup_ccp2(CCP_CAPTURE_FE);
adxl2_waiting_for_fall=TRUE;
}
}


void accelerometer_init(signed int32 zerog, long ppg) {
adxl_zerog=zerog;
adxl_ppg=ppg;

setup_ccp1(CCP_CAPTURE_RE);
adxl_waiting_for_fall=FALSE;
adxl2_waiting_for_fall=FALSE;
setup_timer_1(T1_INTERNAL);
setup_ccp2(CCP_CAPTURE_RE);
enable_interrupts(INT_CCP1);
enable_interrupts(INT_CCP2);
enable_interrupts(GLOBAL);


}

signed long accelerometer_read(void) { // Returns hundreths of a g
int32 value;
int8 value1;

ax1=ad1;
ax2=ad2;
a1x1=a2d1;
a1x2=a2d2;
value1 = read_adc();

putc(0xaa);
sendlong(ax1);
sendlong1(ax2);
sendlong2(a1x1);
sendlong3(a1x2);
putc(value1);

value = adxl_t1 ;

return(value);
}


void main()
{
int value;
signed int32 value1;
float value4;

port_b_pullups(TRUE);
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_INTERNAL);
setup_spi(FALSE);
setup_counters(RTCC_INTERNAL,RTCC_DIV_1);
setup_timer_2(T2_DISABLED,0,1);
accelerometer_init(50,4);

do {

set_adc_channel(0);

value1=accelerometer_read();
output_b(value);



} while (TRUE);
}


and the header:

#include <16F877A.h>
#device adc=8
#use delay(clock=20000000)
#fuses NOWDT,HS, PUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)



Please give me suggestions

Thanks

[rwyoung]