Quadrifoglio Verde Posted July 27, 2017 Posted July 27, 2017 Hello, i have Hummingboard 1 with mainline kernel 4.11.6. And i have problem with GPIOs, after exporting GPIO 72 (also i try 73,71,1 / pin 11,13,7), set direction to OUT and value to 0 i have still 3.3V on pin 12 (11,13,7...). Also try 72 as OUT value 1 and 73 as IN ... and short this pins 11-12 by wire. gpiochip2: GPIOs 64-95, parent: platform/20a4000.gpio, 20a4000.gpio: gpio-68 ( |PCIe reset ) out hi gpio-69 ( |gpio-ir-recv ) in hi gpio-72 ( |sysfs ) out hi gpio-73 ( |sysfs ) in lo gpio-83 ( |brcm_reg ) out lo gpio-86 ( |usb_otg_vbus ) out lo 73 read as LOW. Also i try wiringX and test app "wiringx-read 1 0": running on a hummingboard Writing to GPIO 1: High Reading from GPIO 0: 0 Writing to GPIO 1: Low Reading from GPIO 0: 0 please help me :-) thanks.
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