Correct. The ADC pins are on the processor, not the PMIC. Gerald
On Tue, Dec 17, 2013 at 1:20 PM, <[email protected]> wrote: > It makes sense. Thank you. > > Just for the sake of completeness, this detection of the 3.3V regulator > would be done by the processor, not directly by the PMIC, correct? > > > On Monday, December 16, 2013 5:12:48 PM UTC-5, Gerald wrote: > >> It is there to detect if the 3.3V regulator, that is separate from the >> PMIC, is working. he shunt resistor was removed from the BeagleBone Black >> design. I felt that detecting the regulator was more important than a >> feature very few people used. >> >> Gerald >> >> >> >> On Mon, Dec 16, 2013 at 3:16 PM, <[email protected]> wrote: >> >>> Hi Gerald, >>> >>> Could you explain why you decided to remove this from the BeagleBone >>> Black? I cannot figure out the use of AIN7 in the BeagleBone Black >>> configuration. >>> >>> I understand its use in the BeagleBone. However in the BeagleBone Black, >>> it seems to me that it should read a fixed value of 1.65V. Am I missing >>> something? >>> >>> I read in a couple of places that it could still be used to measure the >>> power consumption by adding a shunt resistor. From looking at the schematic >>> of the BeagleBone Black I do not see how this is possible. Do you have any >>> hint on this? >>> >>> Thanks in advance, >>> Nicolas >>> >>> >>> On Monday, August 12, 2013 8:39:50 PM UTC-4, Gerald wrote: >>> >>>> There is not. LiION batteries typically use fuel gauges as you cannot >>>> rely on voltage as an indicator of capacity. I removed this from the >>>> design. The BeagleBone has this feature and I am familiar with its >>>> function.. >>>> >>>> I have no plans to add it back in to the BBB. >>>> >>>> >>>> Gerald >>>> >>>> >>>> >>>> On Mon, Aug 12, 2013 at 6:22 PM, chameleon452 <[email protected]> wrote: >>>> >>>>> Hello, >>>>> >>>>> I have a BB black and was wondering if there is a way to read the >>>>> voltages for the power supplies, in particular the battery, in order to >>>>> implement a battery level indicator. >>>>> >>>>> It appears that the PMIC (TPS65217C) provides an easy way to feed the >>>>> various supply voltages into an ADC pin, even properly scaled to 1.8V, >>>>> through the MUX_OUT pin. I can read and write the various PMIC statuses >>>>> through /dev/i2c-0, but unfortunately according to the BB schematic the >>>>> MUX_OUT pin doesn't appear to be connected to anything, so it looks like >>>>> it's impossible to sample the voltages. >>>>> >>>>> Is there another way to read the battery level that I am missing? If >>>>> not, it might be a good idea for future revisions to connect the PMIC's >>>>> MUX_OUT to one of the AM335x's ADCs. This shouldn't create any >>>>> incompatibilities as the default setting for the MUX is high impedance >>>>> (see >>>>> MUXCTRL in the TPS65217 reference manual, http://www.ti.com/lit/ >>>>> ds/symlink/tps65217c.pdf). >>>>> >>>>> -- >>>>> 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/groups/opt_out. >>>>> >>>>> >>>>> >>>> >>>> -- >>> 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/groups/opt_out. >>> >> >> -- > 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/groups/opt_out. > -- 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/groups/opt_out.
