I just noticed these two lines and thought I would flag them for someone to fix:
72 INA220_BRNG_32V_FSR = 0x0200, // should be 0x2000
122 INA220_BADC_AVG_1_SAMPLE = 0x0400, // should be 0x0000 if you are ORing the ADCBIT bit
// mask with the SAMPLE bit mask