someone help me with my microcontroller!

today 8x51 is cheaper, no expensive, dont make a joke.

you'd better post your sheme here, sothat we can find something wrong.

hoewver you should check following step,

1, is oscllator oscillating?

2, check your start circuit to see if it sets and goes at oooh.

3, lable should be from small to big, like this back1, back3 , backn..

4 how do you link led to the micrchip?

5need a transistor from p1.0 to drive led.

...

6, its good for u to arrange a jmp command at 000h.

start implemention at other cells.

is there any other method by which i can check if my oscillator is working instwad of a CRO?

I cannt access to your page. what is that?

what is cro?

if you would check oscilator woiking right, and if you would havnt got an oscillascope, you can use a multimeter. this will need enperience. is better digital meter.

theory is simple, but practise is complex.

I dont know you where from.

I wonder why no other like to help you with it, they all appear to be specialists.

here is the circuit diagram: http://img300.imageshack.us/img300/8934/1st89512xi8.jpg

The green camera on the text editor bar lets you insert pictures.

Brad

Assuming that your Vcc is +5 volts, and assuming that your are using a garden variety LED (1.2 volts drop), you are drawing only 7.45 mA to run the LED... which might not be enough for it to light.

I would check the specs to see if the port can sink 20 mA, and if so, change your resistor to 200 ohms (from 750 ohms). This should give you 20 mA of current through the LED.

If the port cannot sink 20 mA, get a 4050 Cmos buffer. Use a section of this chip between the port and the LED, and eliminate the resistor entirely. This buffer will handle the current limiting nicely with no resistor.

Hope this helps...

Bill

One oops in last statement... 510 ohm resistor... not 750 ohm resistor. Sorry

Bill

I can see in your code where you set the port to #00H which should turn on the LED, but your other references are 12 bit numbers... like #0FFH. Is there any possibility that one of these should be #FFH? I have NO FAMILIARITY with this controller so this is a wild assed guess.

Bill

thanks UV posts the pic. now I see it.

Hi, Sciessic2,

#0ffh is no problem for any compter data expression,

What you said to add a transistor is right. ouput of microchip current usually is too weak to drive a power device directly. so he much add a buffer.

he can use cpl command, which is common in many computers, but this is more simple for him use #00h--#0ffh command. and loop.

if he connect the low luming led at p0 port, he neednt a trnsistor, which port can drive the led at 8ma. which can light the led.

I could supply you with this microcontroller already made. We would be completely willing to work with you if you wanted to incorporate this into your project. We can work out a deal to send you a demo unit if you wish: http://www.blackbirdco.com