Re: [avrdude-dev] [bug #45256] Raspberry Pi sysfs bug workaround for linuxgpio driver
The Raspbian GPIO timing issue has been known for quite a while and discussed at: https://github.com/raspberrypi/linux/issues/553 I believe this affects Raspbian only. I use Fedora 22 on the Raspberry Pi 2, and Fedora has not changed the customary GPIO semantics. Pidora (on older Rapsberry Pi boards) also has normal GPIO semantics. I have no direct experience with the Ubuntu variants. ___ avrdude-dev mailing list avrdude-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/avrdude-dev
Re: [avrdude-dev] [bug #44218] linuxgpio not working with raspberryPi 2. Can't open gpioX/direction : Permission denied. Fixed by little delay
Problem in Raspbian, discussed in: https://github.com/raspberrypi/linux/issues/553 Does not occur in Pidora. Raspbian decided to extend the export operation to user space but the implementation is ugly - the write to /sys/class/gpio/export completes before the user-space logic modifies the created files, which can disrupt use of those files. Wait a bit can help, but is unsatisfactory because there is no reliable definition of how long a bit must be to be effective. The write to /sys/class/gpio/export should block until the user-space operation is complete. ___ avrdude-dev mailing list avrdude-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/avrdude-dev
