Function esp_idf_sys::rtc_io_number_get

source ยท 
pub unsafe extern "C" fn rtc_io_number_get(
    gpio_num: gpio_num_t,
) -> c_int
Expand description

@brief Get RTC IO index number by gpio number.

@param gpio_num GPIO number @return >=0: Index of rtcio. -1 : The gpio is not rtcio.