DSO Nano Video / SD Card

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Toby
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DSO Nano Video / SD Card

Post by Toby » Thu Oct 01, 2009 5:21 pm

Hi,
I’ve made a Video so that you can compare it to the JYETECH DSO and a Rigol DSO (http://www.freeduino.de/de/blog/digital ... Cr-22-euro).
Here you go: http://www.youtube.com/watch?v=H4N7EwLfHKk

But a bit of information would be great. What's the "M" button for? How do I store anything on the SD card? Why doesn't my DSO show up as external drive when I connect it to the computer?
Thank you :)

tf_dk
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Location: Denmark

Re: DSO Nano Video / SD Card

Post by tf_dk » Sat Oct 17, 2009 3:34 am

If you have a micro SD card inserted, the two middle function options (FS and FL) are enabled and if pushing "M" when FS is selected, a wave form should be saved. FL is for loading a saved waveform, also with "M".

It doesn't work for me (gives "SD Card Err"), but that might be because the card I use is too large (4GB). I'll try to get a smaller one and try it again.

Mine doesn't show up as anything (on my Mac), but that might also have to do with the SD card being too big.

/Thomas

Toby
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Re: DSO Nano Video / SD Card

Post by Toby » Sat Oct 17, 2009 3:41 pm

Yeah, it gives me the "SD Card Err", too :(

tf_dk
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Re: DSO Nano Video / SD Card

Post by tf_dk » Sat Oct 17, 2009 3:52 pm

If I power on the device with the micro SD card inserted, it just shows me a white screen, but if I insert it after power on, I get the error.

Are there anybody that knows how big a card is supported, and how it needs to be formatted?

/Thomas

justblair
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Re: DSO Nano Video / SD Card

Post by justblair » Sat Oct 17, 2009 7:23 pm

Try this....

Insert the card in your nano.

Connect USB

Once the nano is recognised, try and visit via windows explorer, it may ask for a format, I quick formatted with default FAT32

Next you will have to change your folder view properties so that "known file types are unhidden"

Now create a txt file, rename it to FILE002.DAT (seems to be case sensitive)

Now when saving you can save the waveform to the card (well at least I can!)

You can create more of the files via your PC so that you can store many wave forms.

Now all I need is a way to transfer the image from the screen to my PC. I misunderstood and thought this was a feature...

Toby
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Re: DSO Nano Video / SD Card

Post by Toby » Sat Oct 17, 2009 7:29 pm

justblair wrote:Try this....

Insert the card in your nano.

Connect USB

Once the nano is recognised, try and visit via windows explorer, it may ask for a format, I quick formatted with default FAT32
Well.. and if it doesn't get recognized at all?
On the Nano, the Battery icon changes to USB, on the PC nothing happens at all.
Toby

justblair
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Re: DSO Nano Video / SD Card

Post by justblair » Sat Oct 17, 2009 9:52 pm

Hmmm

My nano gets recognised with or without a card in the slot. I am using Win7.

Win7 takes ages to recognise any usb device first time, but it does find it.

Another thing you can try. Do you have a USB adaptor to lt you read the micro SD card? Might be worth trying formatting the card and adding the dat files that way.

FWIW I am usig a transcend 2GB SD card

Toby
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Re: DSO Nano Video / SD Card

Post by Toby » Sun Oct 18, 2009 5:37 am

justblair wrote:Hmmm

My nano gets recognised with or without a card in the slot. I am using Win7.

Win7 takes ages to recognise any usb device first time, but it does find it.

Another thing you can try. Do you have a USB adaptor to lt you read the micro SD card? Might be worth trying formatting the card and adding the dat files that way.

FWIW I am usig a transcend 2GB SD card
No, still "SD Card Err"...

justblair
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Re: DSO Nano Video / SD Card

Post by justblair » Mon Oct 19, 2009 3:54 am

I have just spotted something wrong.

although the process I detailed before allows the dso to save a waveform, it is not necessarily saving it into the files that I thought it was. In fact i cant find where in the sd card it is saving at all.

Regardless of which file I try to open, I get the last saved waveform. Looking at the files on the sd card the only one with any info in it at all appears to be called _disk_ID.pod

I think we need a bit of guidance from the Seeed team on how this is supposed to work....

Toby
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Re: DSO Nano Video / SD Card

Post by Toby » Mon Oct 19, 2009 5:36 am

Yeah that would be great..
I think they're busy or something, my last depot order has not been processed since 3 weeks although I've already paid :(

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