No Propeller Found on any serial Port!

propwell

Hi together,

i'm setting up a new Propeller-Board, but i've got trouble with connection the prop to my PC.
I connect it, my laptop finds the com-port, but when i hit F10 in my Propeller Tool, it calls "No Propeller found on...".
I'm pretty sure that it has something to do with my USB2Serial-Connector. I connected the RX/TX Pins, the GND pin, but i don't know what to connect with the RESn-PIN on the propeller side? Which Pin of the USB Mini-B FT232R Evaluation Module do i have to connect?

Thanks to you!

Clock Loop

This thread
http://forums.parallax.com/forums/default.aspx?f=25&m=285927
Second post has your answer.

I didn't know myself, but knew it was here.

I did this by going to: http://search.parallax.com
and putting in these keywords: serial reset pin forum propeller

[noparse]:)[/noparse]

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Meh. Nothing here, move along.

Clock Loop

Actually you can't do it.

Your FTDI eval chip has no pin access. Unless you can get at the DTR pin and wire it to your reset pin on your propeller, you need to get a propplug, or a non-evaluation ftdi chip.

Basically you need more than TX and RX on your USB device. You need DTR also. OR RTS

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Meh. Nothing here, move along.

Post Edited (BPM) : 6/5/2009 10:11:48 AM GMT

propwell

thanks for your answer, but what is the DTR-Pin? I just have RTS# and CTS# on my USB-part!

propwell

ah ok sorry, just read your answer! So that's definitely impssible to program the propeller with my USB-Device??

Clock Loop

Because parallax is smart, you can use DTR or RTS as your reset pin.

LOL, after looking at the propeller tool preferences.... you can use RTS as your reset.

Connect reset to the RTS pin on your usb device. Pin 3 i think.

The go into the propeller tools "Preferences" (F5) and choose the operation tab, and under "port management" choose propeller reset signal of RTS.

It should work. Make sure you set your usb device to 3.3v mode.

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Meh. Nothing here, move along.

Post Edited (BPM) : 6/5/2009 10:19:25 AM GMT

propwell

ok, now i checked my board an made the following notice: I measured the Voltage at the RESn Pin on the Propeller, because of my suspicion of having Problems with the resetting.
That's what i measured:

Prop: Powered
USB: Disconnected
Measured: ca. 2,6V

Prop: Powered
USB: Connected
Measured: Voltage goes up on 3.3V then:
7 times down to 0V (1 short time, then 3x 2 short times)
then 3.3V
when trying to acces Propeller:
just 1 short time down to 0V

Questions:
1) Why is there 2.6V when not connected to PC?
2) Could that fact be a cause of my Problems?
3) When not, the whole resetting-thing doesn't seem to be my problem?! What other possibilities are there?

Thank you very much for your help!

propwell

Post Edited (propwell) : 6/5/2009 3:03:26 PM GMT

propwell

and another question: What about the BOEn-Pin? Do i have to connect it with the ground?

Clock Loop

I soldered mine to gnd. I figured you would read the pinout definitions.

For any chip, get the datasheet, ...
You should always read in detail what each pin does,
and what you need to do to get it into its normal state.

The propeller for basic use, needs the BOEn-pin tied to GND.

That would have made it not work.

I should have asked before, can you post your schematic? draw it in mspaint or something.

propwell

BPM, i've read the Datasheet and i do have connected it to the ground, but i wasn't shure if it was right.

Vaati

Hmmm.... If it still doesn't work, then you might be the lucky person to get a fried prop... That's what happened to me. Check this out: http://forums.parallax.com/forums/default.aspx?f=25&m=347948

Does that help.... ?

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Quit buying all those fixed voltage regulators, and·get an Adjustable Power Supply·for your projects!· Includes an LED testing terminal!

propwell

well the biggest mysterium is that i worked 2 times: I connected PIN 4 (CTS) with RESn on prop, connected it to the PC and the propeller-tool found i for the first try, but on the second it didn't!
Then i changed something (what a petty: i don't knpw anymore WHAT) and i doesn't work now at all!

I'm becoming crazy...

propwell

hm i didn't mention it before but i'm trying to set up the Video-Overlay-Module from HITT-Consulting. And there is this on 0.1uF-Capacitor on the VDD-Pin, i don't really know what it hast to do! Could there be the problem?

Vaati

Nope--it's meant to be like a filter cap or something.... It's just for good measure...

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Quit buying all those fixed voltage regulators, and·get an Adjustable Power Supply·for your projects!· Includes an LED testing terminal!

ProcessingData...

I had a period of time when I was getting the exact same message, and it turned out to be the annoying "do not include this port in future searches" check box that pops up when you lose a prop on the line in the middle of downloading the program to it. I fixed it by going into the prefrences and telling it to include it again.

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Basic Stamp,···· Propeller,·· · SX,·· FUN!


START:·
>Proccessing Data. . . .··
>Task Complete. . .·.
>Saving Data. . . .
>Entering SLEEP Mode. . . .
>Signing OFF


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