Function mraa_sys::mraa_uart_ow_bit

pub unsafe extern "C" fn mraa_uart_ow_bit(
    dev: mraa_uart_ow_context, 
    bit: u8
) -> c_int

Write a bit to a 1-wire bus and read a bit corresponding to the time slot back. This is possible due to the way we wired the TX and RX together with a diode, forming a loopback.

@param dev uart_ow context @param bit the bit to write to the bus @return the bit read back during the time slot or -1 for error