Problem getting input from pin B4 & B5 -pic18f4550

[nicko-391]

Im using pic18f4550.Im checking input state of B4 & b5 in main programme. (Im using ccs)
If input are high another sub programme should run.But programme can not check the input.Whats the wrong?please help.

 

[zuisti]

"Whats the wrong?"

Without any program source we cannot help to you!

 

[nicko-391]

void main(){

glcd_init(on);
enable_interrupts(int_ext);
setup_timer_0(RTCC_INTERNAL | RTCC_div_256);
enable_interrupts(Global);
set_timer0(0);
ext_int_edge(1);

while(1){

read_es(); // this is a sub programme

if(input(pin_b4)){

while(input(pin_b4)){
}


glcd_init(off);
glcd_init(on);
data_mode=1;
init_ext_eeprom();
last_adress=read_ext_eeprom(0x00);
data_logger(); // This is a sub programme
}
}
}


This is the main programme.My problem is whether pin B4 is high data_logger sub programme is not executed.:-(

 

[zuisti]

From your code (commented by me):

 if (input(pin_b4)) {           
     [COLOR="blue"]//runs only if pin_4 is equal to 1[/COLOR]

     while (input(pin_b4)) {    
     } [COLOR="red"]//but this loop is waiting until pin_4 == 0[/COLOR]

  ...
  ... [COLOR="blue"]//so your instructions here are not executed until pin_4 goes to 0[/COLOR]
  ...
 }

My recommendation:
at first write a simple program to sense the input pin state only,
and only then continue if it is already working well.