I belive that they may not provide required current. But would it cause by BBB not to power on?
I will connect external resistor with sda1 and scl1 pins of BBB which are already pulled up. Where should I connect the other leg of these resistor. Regard Jay Kothari On Thursday, 15 January 2015 11:21:22 UTC+5:30, john3909 wrote: > > > From: JAY KOTHARI <jaikot...@gmail.com <javascript:>> > Reply-To: "beagl...@googlegroups.com <javascript:>" < > beagl...@googlegroups.com <javascript:>> > Date: Wednesday, January 14, 2015 at 9:17 PM > To: "beagl...@googlegroups.com <javascript:>" <beagl...@googlegroups.com > <javascript:>> > 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 don’t 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 <jaikot...@gmail.com>: >> >>> 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-BMP085_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 beagleboard...@googlegroups.com. >>> 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 beagleboard...@googlegroups.com <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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
