Hi Paulo, the framer is also active when no display is connected. You can see that in the cape manager. A full description on how to find out the usage by the cape manager and how to disable the framer is here: https://groups.google.com/forum/#!searchin/beagleboard/disable$20hdmi$20gpio/beagleboard/1dluTWZ5AEA/Ddzm6aWCPF8J
But be aware of the pullup/pulldown resistors connected to the port pins on header P8 (see schematic sheet). Am Dienstag, 10. Februar 2015 20:10:47 UTC+1 schrieb Paulo Sherring: > > Hi there! > I am developing a software that is to run on a BBB, runing Debian wheezy > with 3.14.2x-ti. The sofware is goind to control stepper motors, much like > those CNC controllers that I have seen around here, such as machine kit et > cetera. > So, as I dont have need for hdmi, I am using its pins for my own > aplication, since there are a lot of GPIO2 pins in the headers and using a > single GPIO allows the better usage of memory access, since more pins can > be set in a single memory read-modify-write operation, or even a single > write do SETDATAOUT and CLEARDATAOUT registers. > I have found a few outdated sources that indicates that I dont need to > disable the framer, since it only acts when a display is detected. Some > other more recent post point that I can disable it changing uEnv.txt, but > on my image, I can't figure how to do this, since the only thing on my > uEnv.txt is the kernel string. > Can anyone give me a hint on which way is the way? > Thanks! > Paulo Sherring. > -- 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.
