ut_assertok(dm_i2c_read(dev, 0, buf, 5));
ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
ut_assertok(dm_i2c_read(dev, 0, buf, 5));
ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));