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Olimex Support Forum

Others => UEXT => Topic started by: Jay Kothari on January 15, 2015, 09:58:06 AM

Title: bmp085 with uext interface beaglebone black
Post by: Jay Kothari on January 15, 2015, 09:58:06 AM
Hello,
     I am using mod-bmp085 with uext interface. I am interfaceing with beaglebone black. Following are my connection to beaglebone black

1)vcc(pin3)
2)gnd(pin1)
3)scl(pin17)(internally pulled up)
4)sda(pin18)(internally pulled up)

    But my BBB is not getting power due to this interface!!!!when I remove this interface it starts normally.Any idea why it is causing this problem. Do I need to attched external pull up resister to BBB
     
Jay Kothari     
Title: Re: bmp085 with uext interface beaglebone black
Post by: dave-at-axon on January 23, 2015, 07:18:46 AM
I2C1 is used to check for capes so why not use I2C2 instead? It states on this website that it is free.

http://elinux.org/Beagleboard:Cape_Expansion_Headers

By the way, both I2C1 and I2C2 don't appear to have pullups on the bus on the BBB so you may need them on your BMP085 board.
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