Method read

libraries/AP_HAL_ChibiOS/GPIO.cpp:238–250

uint8_t GPIO::read(uint8_t pin)
{
    struct gpio_entry *g = gpio_by_pin_num(pin);
    if (g) {
        return palReadLine(g->pal_line);
    }
#if HAL_WITH_IO_MCU
    if (AP_BoardConfig::io_enabled() && iomcu.valid_GPIO_pin(pin)) {
        return iomcu.read_virtual_GPIO(pin);
    }
#endif
    return 0;
}

void GPIO::write(uint8_t pin, uint8_t value)
{