Jetson Nano Fast GPIO C++ Example with Direct Memory Access (DMA)

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
3

hello xplanescientist,

you may refer to standard APIs to access GPIOs from kernel side.
for example,
$L4T_Sources/r32.4.3/Linux_for_Tegra/source/public/kernel/kernel-4.9/include/linux/gpio.h

static inline int gpio_get_value(unsigned int gpio)
{
        return __gpio_get_value(gpio);
}

static inline void gpio_set_value(unsigned int gpio, int value)
{
        __gpio_set_value(gpio, value);
}