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Working with A20 OLinuXino or SOM GPIOs when using new Armbian based A20 universal Linux image
A20 GPIO ports are 32 bit registers listed in alphabetical order PA, PB, PC, PD, PE, PF, PG, PH, PI. In Armbian GPIO ports are numbered from 0 to 287 corresponding from PA0 to PI31. The GPIO number…