From: JAY KOTHARI <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Wednesday, January 14, 2015 at 9:17 PM To: "[email protected]" <[email protected]> Subject: Re: [beagleboard] bmp085 with uext connection with BBB
> bmp085 sensor works on 3.3v volt. I have internally pulled up the pin and I > can see resistor connected in the harware diagram of bmp085. > Still I connect external resistor? The internal resistors don¹t provide enough current. You will still need external resistors and I suggest 4k7. Regards, John > > > On Thursday, 15 January 2015 09:56:46 UTC+5:30, liyaoshi wrote: >> Can you try connect with external 5V supply ? >> BTW, suggest R2 and R3 connect with 10k resister , >> >> >> 2015-01-15 12:14 GMT+08:00 JAY KOTHARI <[email protected] <javascript:> >: >>> Hello, >>> I am using bmp085 sensor with uext connection with beaglebone black. I >>> have made change in device tree of BBB. I have made i2c1(pin 17 and 18) as >>> input pin and pulled up internally and set it to mode two. I have also set >>> compatible property in device tree to load module of bmp085. >>> After looking into hardware design manual of bmp085 I interface with >>> beaglebone black.I connected four wire (vdd(pin3),gnd(pin1),sda(pin17) and >>> scl(pin18)) and kept other unconnected. >>> >>> https://www.olimex.com/Products/Modules/Sensors/MOD-BMP085/resources/MOD-BMP >>> 085_sch.pdf >>> >>> When I boot my kernel my bmp085 module is loaded automatically and I am >>> getting entry in /dev of i2c1 >>> >>> Problem: >>> When I connect BBB with bmp085 my kernel hangs or BBB does not start at >>> all!!!!What may be the problem???? >>> Note: >>> I am not using 5v supply. >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected] <javascript:> . >>> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
