zephyr::raw

Function gpio_pin_get_raw

source 
pub unsafe extern "C" fn gpio_pin_get_raw(
    port: *const device,
    pin: u8,
) -> i32
Expand description

@brief Get physical level of an input pin.

A low physical level on the pin will be interpreted as value 0. A high physical level will be interpreted as value 1. This function ignores GPIO_ACTIVE_LOW flag.

@param port Pointer to the device structure for the driver instance. @param pin Pin number.

@retval 1 If pin physical level is high. @retval 0 If pin physical level is low. @retval -EIO I/O error when accessing an external GPIO chip. @retval -EWOULDBLOCK if operation would block.