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USB to Serial
Our team is having some troubble finding a usb to serial adapter that works for uploading programs. Currently, we use an OLD laptop with a serial port that allows our team to program because we don't have a working adatper.
So, could anyone out there post the exact kind of usb to serial adapter they use for their programming, and where they got it? Or, if you use a serial port on your laptop to upload, what brand of laptop is yours? Thanks |
We use an old PII 333 Gateway Solo laptop. It has a serial port, as does my Acer (Celeron 333). We haven't found anything that needs more speed and very few things that even could benefit from a faster processor (PBASIC just isn't that complex).
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Refer to this post
http://www.chiefdelphi.com/forums/sh...=&postid=88037 |
don't see the need for a usb to serial. serial is quick enough when loading such a small program. we use any computer that we can get our hands on laptops included to program our wonder bot. we use db9 to program. never saw the use to have a faster upload / download time for something so small as pbasic codes. i agree with Rbayer
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Actually, what I think we'd really like to know is if anyone has used a USB-to-serial adapter for programming.
I'll elaborate on our situation a bit: I bought a new laptop this summer, and it didn't come with a serial port. I then bought an adapter to program, but every time I plug the laptop into the RC and reset, it gives a "Basic Init Error" and the Stamp software says "No BASIC Stamp Found". I'd like to use the new laptop and retire our old programming laptop, as it is slow and has no battery. Mine has no serial port, and we have no other usable machines, so finding one is not an option. Any ideas on how we can fix this? |
the reason why u get that error is partially b/c pbasic doesn't support usb. it only supports serial connection to the R.I. unless theres a newer version out there that supporst both USB and Serial.
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The idea behind the adapter is to make the system have a serial port. What I don;t get is why mine doesn't work. Has anyone tried this before?
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Quote:
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We had a similar problem with a newer laptop. ALthough it came with a built in serial port, the stamp would not boot if it was still connected. We had to connect, load, unconnect and reset to get it to work. We never got the debug function to work correctly with this set up. Good Luck
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i still say thats almost impossible to sell a laptop w/o a com port. theres gotta be one there.
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It's the Toshiba Satellite 5105-S501. You can check it yourself if you want. It's got bluetooth, IrDA, USB, FireWire, and Ethernet, but no serial or parallel ports.
In case it helps, the adapter I tried (unsuccessfully) to use was a Belkin USB PDA Adapter. |
Have you asked Toshiba? Sometimes they sell special add-ons, but they're usually far more expensive than they need to be.
When you were using the Belkin, did a COM port ever show up in Device Manager? If not, there's probably something wrong with the drivers. If it did, but was assigned some number greater than 4, (ie COM5), that could be the problem as I don't think the editor will recognize anything over COM4. If this is the case, I can write a quick-and-dirty application to tokenize your code and send it to the RC. Contact me for details if you're interested. |
The COM port showed up in Device Manager as COM 3. I changed it to COM 1, and still got the same problem. What is happening is when I connect the serial cable to the RC, I get a BASIC Init Error. Any thoughts on why that happens? Do you think it's an issue with my PC, the adapter, or the RC? Or is it just a software problem?
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It's probably something with the RC. We have an old one lying around that anytime you plug any serial cable into the programming port it does the same thing. When I use the exact same laptop/cable combination with our newer RCs, it works just fine. Does your team have any old RCs lying around? If not, you should get the EduRobot soon, and I'd try it on that.
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I'll give that a try tomorrow. Hopefully it's just the RC. It's our OCCRA RC, so I won't be able to do anything with my laptop this fall, but if it works on others, at least I don't have to drag out my old laptop for FIRST, too. I'll let you know how it goes.
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