ads1015_set_conv_mode
ret = ads1015_set_conv_mode(data, ADS1015_CONTINUOUS);
ret = ads1015_set_conv_mode(data, ADS1015_SINGLESHOT);
return ads1015_set_conv_mode(data, ADS1015_SINGLESHOT);
ret = ads1015_set_conv_mode(data, ADS1015_CONTINUOUS);