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USB connected arduino

posted in Uncategorized
Wednesday, January 04 2012, 06:02 AM
0
Hi, I want to connect and arduino to the igepv2 via the USB host connector. I got ubuntu (from the wiki) running on the igep. When i plug in the arduino it doesnt as a usb-serial converter and dmesg shows \\\"hub 1-0:1.0: unable to enumerate USB device on port 1\\\". I am running kernel 2.6.35-23. I also tried the running the poky-sato image on the ubuntu SDK (NFS) and I get the same proplem. Any ideas on what I am doing wrong and how to get it to work? Any help appreciated Byron
Responses (3)
  • Accepted Answer

    mcaro
    mcaro
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    Thursday, January 05 2012, 01:17 PM - #permalink
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    I suggest you use a USB 2.0 hub for connect your arduino board ... Manel
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  • Accepted Answer

    Thursday, January 05 2012, 08:11 PM - #permalink
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    I went and got a hub and the packaging says USB2,0 and the same thing happens. It is possible the the packaging is wrong. The port does work because I have tried it with a usb2.0 flash drive and it works. Is the problem that the igep usb host port only operates at usb2.0 and the hub are at a different speed?
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  • Accepted Answer

    mcaro
    mcaro
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    Monday, January 09 2012, 10:14 AM - #permalink
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    No if you use a USB hub 2.0 in other case it not work if your device it\\\'s full or low speed ... I left here for your information the OMAP errata manual information: [url=http://www.ti.com/lit/er/sprz319d/sprz319d.pdf]http://www.ti.com/lit/er/sprz319d/sprz319d.pdf[/url] Page 29:
    As shown in Figure 6, USB Port 1 and Port 2 can be used to connect to external high-speed PHYs which include a ULPI port. However, in this case, the external USB PHY must be able to accept a source clock generated by the DM37x high-speed USB controller. Also, in this usage model the USB ports cannot support full-speed and low-speed operation. Therefore, using this approach, USB Port 1 and Port 2 cannot provide a fully compliant USB 2.0 Type-A receptacle; a high-speed USB hub would be required in this case; please see Figure 7.
    Regards Manel
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