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]<javascript:> > > 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] <javascript:>. >> 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.
