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1-wire question

posted in Uncategorized
Thursday, December 01 2011, 08:11 PM
biga
biga
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Hi! I have an IGEPv2 RC board. I\\\'d like to setup a simple 1-wire temperature sensor for monitoring. How can I do that? Is there any interface (gpio, etc) on the baseboard for 1-wire devices? Thanks for your reply, biga.
Responses (3)
  • Accepted Answer

    Monday, December 05 2011, 09:19 AM - #permalink
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    Hi, OMAP3 has one 1-Wire interface (hdq_sio/gpio 170) , unfortunately on IGEP v2 this pin is used for DVI control (DVI_PUP) so it\\\'s not available. OTOH you can use for example an I2C to 1-wire bridge like DS2482-100 or similar. For more information about 1-Wire on OMAP3, see HDQ/1-Wire / HDQ/1-Wire Environment section of the AM/DM37x Multimedia Device Technical Reference Manual (literature number SPRUGN4).
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  • Accepted Answer

    biga
    biga
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    Wednesday, February 01 2012, 11:38 AM - #permalink
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    Hi, Thanks for your reply. I1ve found a 1-wire->i2c bridge. Can you take a look at this one whether I can use it or not? [url=http://microcontrollershop.com/product_info.php?products_id=2515]http://microcontrollershop.com/product_ ... ts_id=2515[/url] If yes, where should I connect it? Maybe to J990? And how? :) Thanks, biga
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  • Accepted Answer

    Thursday, February 02 2012, 09:49 AM - #permalink
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    The DS2482-10 uses 3.3V or 5V, but the pins of IGEP board uses 1.8V, you can\\\'t connect directly, you should use a level translator to connect the 1-wire->i2c bridge to the IGEP board.
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