Could you post or send me your overlay? I can load it on one of my BBBs and take a look for you.
Zach On Tuesday, December 3, 2013 8:39:35 PM UTC-6, Bit Pusher wrote: > If I load my device tree overlay to use the high-speed GPIO pins first, and > then try to read the ADC using Adafruit_BBIO, it kicks me out of python: > > > > ~/pru\> sudo python > Python 2.7.5+ (default, Sep 19 2013, 14:17:30) > [GCC 4.8.1] on linux2 > Type "help", "copyright", "credits" or "license" for more information. > >>> import Adafruit_BBIO.ADC as ADC > >>> ADC.setup() > >>> ADC.read("P9_40") > ~/pru\> > > > notice no value returned and no python prompt. I suspect this indicates a > problem. > I then rebooted (reset switch), waited until the network started working > again (it takes 5 minutes each time for the network to work, something needs > to timeout) > and then did the same, but this time did not load the device overlay to > change one pru gpio to a high-speed output and got as expected > > > > ~/pru\> sudo python > Python 2.7.5+ (default, Sep 19 2013, 14:17:30) > [GCC 4.8.1] on linux2 > Type "help", "copyright", "credits" or "license" for more information. > >>> import Adafruit_BBIO.ADC as ADC > >>> ADC.setup() > >>> ADC.read("P9_40") > 0.8072222471237183 > >>> > > > I should mention that when I load both overlays, with my overlay first, >cat > $SLOTS shows them both there, just the ADC overlay load does not > work correctly. If I run the ADC.setup() first, and then run > ~/pru\>>sudo sh -c "echo BB-BONE-PRU > $SLOTS" to load my overlay, then > > > > > /lib/firmware\> cat $SLOTS > 0: 54:PF--- > 1: 55:PF--- > 2: 56:PF--- > 3: 57:PF--- > 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G > 5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI > 7: ff:P-O-L Override Board Name,00A0,Override Manuf,cape-bone-iio > 9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-BONE-PRU > /lib/firmware\> > > > and both overlays are shown but the high > speed pin does not work. > Loading just my overlay only, works as expected as far as I can tell (i.e. > the led turns on and off). > I'm guessing things are not quite as expected. > Also, could someone point me to the file in kernel source that loads overlays? > Thanks. > Bit Pusher > > > On Tuesday, December 3, 2013 12:16:34 PM UTC-5, Zachary Thorson wrote: > Correct me if I am wrong, but it appears that you simply want to use ADC and > PRU pins whose pins DO NOT physically overlap on the board? The > cape-bone-iio device tree only grabs the ADC0-ADC7 pins plus analog power and > ground, so it should not interfere with the PRU pins. > > > What issue are you getting when you try to load the PRU overlay after loading > the ADC overlay? > > > > Note: The adafruit library has a cleanup function in code, but it is > commented out due to the lockup on load that you are describing. > > Zach -- 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/groups/opt_out.