Led on PORT A

[fuzzy]

Hi
I've got a little problem.

I have 3 led and a buzzer on ports A0, A1, A2, A3.
i'm using a 16f876

I can't understand why if I set A0,A2 and A3 they make less light than A1.

it seems like tese ports flashes at very high frequncy while A1 is always high.

whn my code find a delay, leds remain down for the delay.

there is no pullup on these ports. I set correctly TRIS to 0.

it seems like ports goes in input during the code and then when I order to set high they go high for awhile and then they go down.

Could you help me??

[Haplo]

Post your code. DOn't forget to use the 'Code' button.

[fuzzy]

It seems the problem is caused by a default analog A port. i solved it using the instruction: setup_adc_ports( NO_ANALOGS );

all ports are digital now.

i haven't this kind of problem anymore.

[valemike]

From my past experience with the 16F876 (and other PIC parts), if i didn't want to use analog, i'd simply not even write a setup_adc_ports() statement and everything came up always as inputs.

Did you have a stray instruction somewhere in the beginning that did set up your ADC ports?

[fuzzy]

No i haven't any instruction setting up ADC. because of it i didn't know what to do!! i assumed all port initially digital!!