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pamoja_gpio_line_open_input

pamoja_ffi::gpio

Function pamoja_gpio_line_open_input 

Source 
#[unsafe(no_mangle)]
pub unsafe extern "C" fn pamoja_gpio_line_open_input(
    chip: *const c_char,
    line: u32,
    out_line: *mut *mut PamojaGpioLine,
) -> PamojaStatus
Expand description

Opens a line on a Linux board as an input.

§Arguments

  • chip - the GPIO chip’s device file, such as /dev/gpiochip0.
  • line - the line’s number on that chip.
  • out_line - receives the line, or null when opening fails.

§Returns

As pamoja_gpio_line_open_output.

§Safety

chip must be a null-terminated string or null, and out_line a writable pointer or null.