Please help me about led is blink when i swap my sourcecode!

[a]

Please help me about led is blink when i swap my sourcecode!

i use PORT_A4 and PORT_A3 is led for show status
below is my sourcecode

#include <16F876.h>
#device *=16
#device adc=8
#use delay(clock=3579545)
#fuses NOWDT,XT, NOPUT, NOPROTECT, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG
#ZERO_RAM

#include<stdio.h>
#include<stdlib.h>

#use fixed_io(a_outputs=PIN_A0, PIN_A1, PIN_A2 ,PIN_A3 ,PIN_A4 ,PIN_A5)
#USE FAST_IO(A)

#define RW PIN_A0
#define RS PIN_A1
#define EN PIN_A2
#define LED0 PIN_A3
#define LED1 PIN_A4

void out_led(int i_led)
{
// disable_interrupts(INT_TIMER0);
set_tris_a(0b000000);
switch(i_led)
{
case 0 : { output_low(LED0); output_low(LED1); break; }
case 1 : { output_high(LED0); output_low(LED1); break; }
case 2 : { output_low(LED0); output_high(LED1); break; }
case 3 : { output_high(LED0); output_high(LED1); break; }
default : { break; }
}
// disable_interrupts(INT_TIMER0);
}

//========================================LCD==================================
void busy_strobe(void)
{
// set_tris_a(0b000000);
OUTPUT_LOW(EN);
delay_us(2);
OUTPUT_HIGH(EN);
delay_us(2);
}

void write_strobe(void)
{
// set_tris_a(0b000000);
OUTPUT_HIGH(EN);
delay_us(2);
OUTPUT_LOW(EN);
delay_us(2);
}

void Command(void)
{
OUTPUT_LOW(RS);
OUTPUT_LOW(RW);
}

void wait_for_lcd_ready(void)
{
unsigned char busy_flag;

SET_TRIS_C(0XFF); //PORTD7 INPUT;
OUTPUT_LOW(RS); //SET FOR READ BUSY;
OUTPUT_HIGH(RW); //SET FOR READ BUSY;

busy_strobe();
busy_flag=(input_C() & 0x80);

while( busy_flag == 0x80)
{
OUTPUT_LOW(EN);
busy_strobe();
busy_flag=(input_C()&0x80);
}

OUTPUT_LOW(EN);

SET_TRIS_C(0x00); //PORTD7 OUTPUT;
}

void clear_lcd(void)
{
Command();
OUTPUT_C(0x01);
write_strobe();
wait_for_lcd_ready();
}

void cursor_off(void)
{
Command();
OUTPUT_C(0x0c);
write_strobe();
wait_for_lcd_ready();
}
void init_lcd(void)
{
Command(); //add 240847
OUTPUT_C(0x38); //add 240847
write_strobe(); //add 240847
delay_ms(5); //add 240847

Command();
OUTPUT_C(0x38);
write_strobe();
delay_us(120); //add 240847

Command();
OUTPUT_C(0x0f);
write_strobe();
wait_for_lcd_ready();

clear_lcd();

Command();
OUTPUT_C(0x02);
write_strobe();
wait_for_lcd_ready();

cursor_off();
}

void Wchar(unsigned char char_)
{
OUTPUT_HIGH(RS);
OUTPUT_LOW(RW);

OUTPUT_C(char_);
write_strobe();
wait_for_lcd_ready();
}

void gotoxy(unsigned char row,unsigned char col)
{
Command();
if (row==1) OUTPUT_C(0x80+col-1);
else
if (row==2) OUTPUT_C(0xc0+col-1);
write_strobe();
wait_for_lcd_ready();
}

void Wcharxy(unsigned char row,unsigned char col,unsigned char data_)
{
gotoxy(row,col);
Wchar(data_);
}

void string_to_lcd(unsigned char row,unsigned char col,unsigned char *st)
{
unsigned char i,len;

// disable_interrupts(INT_TIMER0);

len=strlen(st);
if (len>20) len=20;
gotoxy(row,col);
for(i=0;i<=len-1;i++)
{
Wchar(st[i]);
}
}

void int_to_lcd(unsigned char row,unsigned char col,int data_int)
{
unsigned char str[7];

sprintf(str,"%d",data_int);
string_to_lcd(row,col,str);
}

void long_to_lcd(unsigned char row,unsigned char col,long data_long)
{
unsigned char str[7];

sprintf(str,"%ld",data_long);
string_to_lcd(row,col,str);
}

void hex_to_lcd(unsigned char row,unsigned char col,unsigned char data_hex)
{
unsigned char str[3];

sprintf(str,"%x",data_hex);
string_to_lcd(row,col,str);
}

void float_to_lcd(unsigned char row,unsigned char col,float data_float)
{
unsigned char str[7];

sprintf(str,"%02.1f",data_float);
string_to_lcd(row,col,str);
}
//==========================================================================================

void main()
{
int i;
CHAR TMPCH[16]="HELLO";

delay_ms(100);

set_tris_a(0b000000);
set_tris_c(0b00000000);

port_b_pullups(TRUE);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
disable_interrupts(INT_TIMER0);
// setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);

delay_ms(10);
init_lcd();
output_a(0x00);
delay_ms(10);

while(1)
{
for(i=0;i<=3;i++)
{
//=============================================
out_led(3); //not ok
STRING_TO_LCD(2,1,TMPCH);
// out_led(3); // ok
DELAY_MS(500);
//===============================================
}
}
}
in loop for(i=0;i<=3;i++) if i use out_led(3) before STRING_TO_LCD(2,1,TMPCH); output_on PIN_A4 is blink but PIN_A3 is light normal
but if i use out_led(3) after STRING_TO_LCD(2,1,TMPCH); output on PIN_A4 and PIN_A3 is light.

Please help me because i very confuse about this result.
It should have the same result between 2 sourcecode??????

[a]

i know. RA4 is open drain. Logic must be toggled.

[SherpaDoug]

I for one don't understand your question. Can you write a program of 10 or 20 lines that demonstrates the problem? I don't have time to search through pages of listing when I don't know what I am looking for.
_________________
The search for better is endless. Instead simply find very good and get the job done.

[myheadhurts]

Does the string to LCD function use the same port pin? this could account for the flash of the LED