Propeller not working

BarryFaux

i just bought a 40 pin dip propellor built the circuit from the serial contector to the chip as per the schematic in the manual. i have a usb to serial cable so im using the serial schematic in the manual. ive checked triple checked all my connections, now it recognises the chip and says all is good but i cant get any response from any of the i/o pins. i bought 2 of the 40 pins and tried them both but nothing. anybody have anything i can do to try and solve this? thanx and whats the difference between prop1 and 2?

JasonDorie

Is the Propeller chip powered? You will need to supply 3.3v power to the chip.

Seairth

Can you provide some of the code you are running?

BarryFaux

im using both a 5v and 3.3v regulator. im new to this so ive started with the code in the help folder. its the basic turning an led on and off. im going step by step through this but am having no luck.

Publison

Would be best if you can post a picture of your setup.

NWCCTV

The Prop 2 has yet to be released. Follow the link to get tons of info about the Prop 2 and track its progress. http://forums.parallax.com/categories/propeller-2-multicore-microcontroller

Have you verified that the correct power is coming out of both regulators? It's basically a process of elimination. As the others have alluded to, pics and code would let others help out.

BarryFaux

Sorry but I'm unable to post pics right now. My power supply is 3.3v I have checked this and double and triple checked these connections. The only thing I am not too sure of is the pc to bs2 serial circuit. Its connected properly according to the schematic on the help page. I've had a friend also check double and triple check these connections. Does anyone know how good the schematic for this serial connection is ? I mean it recognizes the prop says the code was loaded but like I said no output.So maybe thats not it. Im thinking about buying the prop plug to eliminate a chance of problem there but otherwise I'm at a loss

Bob Lawrence (VE1RLL)

@BarryFaux


re: pc to bs2 serial circuit.

Do you have a link for that schematic?

This is the serial schematic for the propeller chip?

http://forums.parallax.com/discussion/download/41153

Seairth

@BarryFaux: to be clear, when you say

BarryFaux wrote: »

...now it recognises the chip and says all is good...

does this mean that you are using the Propeller Tool's "Identify Hardware..." function and getting a message like "Propeller chip version 1 found on COM6."? If not, what do you you see when you attempt to identify the hardware?

Seairth

Also, a couple questions about the LED:

* What kind of LED are you using? What are the voltage and current requirements?
* How is the LED connected to the Propeller?
* Are you using a series resistor?
* Do you have the LED's polarity correct?
* Have you verified that the LED can be manually lit? In other words, if you connect it directly to the 3.3V supply, does it light up?

ErNa

Check if the led lights up when connected to 3v3 on one side and to a resistor to ground

Publison

BarryFaux wrote: »

The only thing I am not too sure of is the pc to bs2 serial circuit.

Its connected properly according to the schematic on the help page.

Where does BS2 come into play? Which help page are you using?

BarryFaux

sorry im working on two projects at a time but that should say prop serial

Cluso99

If the code is downloading correctly, then the problem is likely your program. If the downloader is not working (programming the propeller) then there may be circuit problems.
You need to take the time to post some photos, schematics, and code (plus describe what you are using - Windows/Linux/Mac, PropTool/SimpleIDE/PropellerIDE/bst/homespun/GCC, etc).
Otherwise we are just guessing.

BarryFaux

Leds are working so its not that. Could someone give me the code to turn on and off an led so I can test this. Like I said as soon as I get this working Im going to start learning to program it. So thanks for all the help

BarryFaux

it's working, i made a really dumb mistake is all it was. I mixed up the pin out numbers with the actual i/o numbers. All is good now so thanks everyone for the help ,im sure ill be back.