How to get my usb-com-pic link working properly

**bloody-orc** · 7th July 2005 10:15 AM

does anyone know hot to convert usb 2.0 into usb1.1? changing in software would be the best.

**Jay.slovak** · 7th July 2005 10:26 AM

Originally Posted by bloody-orc

does anyone know hot to convert usb 2.0 into usb1.1? changing in software would be the best.

What exactly are you trying to do? USB2.0 is backwards compatible with USB1.1 so there is nothing to solve. :wink:

**shamikrudra** · 7th July 2005 06:33 PM

Originally Posted by bloody-orc

does anyone know hot to convert usb 2.0 into usb1.1? changing in software would be the best.

go to bios setup and deseble USB 2 and it is now USB 1.1

**zevon8** · 7th July 2005 10:15 PM

I agree with Jay.... what is it you need to do? Downgrading the port doesn't seem to answer the original question?

If a device is only capable of 1.1, the port will figure this out and behave accordingly. If the connected device cannot communicate it's abilities I am not sure if it would work ( be recognized and initialize ) in the first place.

**bloody-orc** · 8th July 2005 05:14 PM

the problem is that it doesn't figure it out :P it kinda works with usb 2: it understands, that my usb->com port is connected to it.

i try disabeling usb 2.0

**checkmate** · 9th July 2005 06:29 AM

You have a problem, but you have not described it in enough detail, and there is nothing we can really do but to guess what exactly your problem is.

**bloody-orc** · 10th July 2005 05:31 PM

my problem is, that my usb->serial(COM) converter isn't working. My laptop sees it (it says hadrware working properly) and generates a COM port, but this port is not usable. I'm trying to program my pic(axe) with it and it says hardware not accessible. When i unplug the usb cable from my laptop and stick it in the PC i can download the program in my PIC with no problems. I think my PC is old enaugh to have USB 1.1 not 2.0 but laptop is pretty new.

**Jay.slovak** · 10th July 2005 05:39 PM

I think it's Windows fault, not hardwares. Make sure you are using correct drivers.

**bloody-orc** · 10th July 2005 06:18 PM

windows is same on both of them (xp home SP1) drivers seem to be also the same

**Jay.slovak** · 10th July 2005 06:22 PM

I suppose you should upgrate to SP2, SP1 has many painfull bugs... (Including Firewire and USB)

**panic mode** · 11th July 2005 04:34 PM

i'm not familiar with picaxe but laptops are devices designed to live with limited power and usb ports are often starved (have limited power).
did you try to connect USB hub that has external power supply?
If the power is an issue, this should cover for it. some USB devices require use of two USB ports when connected to laptop (like USB<>IDE interfaces etc.).

**bloody-orc** · 13th July 2005 04:57 PM

thanks for the info.
those USB hubs are darn expencive

can't I connect a battery to the wires to increase the power? of cource regulated power suply. Also my laptop is mainly on a cable so it should have the power needed. The picaxe only uses 2,3,5 pins on COM port (Tx,Rx,Gnd). I dont know if those need wery much power or not

And how big is the % that my thingy might start working after installing SP2? it takes a full day to get that on my computer and i don't have one to spear.

**Jay.slovak** · 13th July 2005 07:02 PM

The chance that SP2 will help you is about 25%, give it a try. SP2 will solve many problems.

**bloody-orc** · 13th July 2005 07:22 PM

and also causes the same amount when using older technologie. Well i'll see if the admin alows to do this on it.

**Jay.slovak** · 13th July 2005 07:27 PM

SP2 has more benefits then problems, you have to try it out!

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