switch

[andys]

I try to create a switch circuit from microcontroller which must to light on a led on pin B0 and light off a led on pin B1 when the input is ==0 and light on a led on pin B1 and light off a led on pin B0 when input is >0

i wrote the code bellow but the problem is that only the LED on pin B0 is light on unless the input is >0 and still light on for all the value of input



if (input(PIN_A0)==0){
delay_ms(10);
output_bit(PIN_B0,1);
output_bit(PIN_B1,0);
}
else{
delay_ms(10);
output_bit(PIN_B0,0);
output_bit(PIN_B1,1);
}








IS anyone know what is the problem????????

[Ttelmah]

It is probably the classic PIC RMW problem (read modify write).
Have a look in the PIC data sheet, and a search on this forum, for these three words, and you should find a number of threads where this is described, as well as fixes for it. It is actually a hardware problem with the chip, especially when there is a significant load on an output pin (what resistors are you using to current limit the LED's).

Best Wishes