Quadrifoglio Verde

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  1. Quadrifoglio Verde

    Hummingboard 1 - GPIO not working

    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.
  2. Quadrifoglio Verde

    Freezing problem with Olimex A20 Lime 2

    Hello, It works, but only for booting from SD, when board boot from NAND then freq. is back on 480Mhz. Can somebody help me, how to keep lower frequency in case when board boot from NAND? thank you.