Function mraa_sys::mraa_i2c_lookup

pub unsafe extern "C" fn mraa_i2c_lookup(i2c_name: *const c_char) -> c_int

Get I2C bus index by bus name, board must be initialised.

@param i2c_name: I2C bus name. Eg: I2C6 @return int of MRAA index for I2C bus or -1 if not found.