(0 << SAMD21_SERCOM_CTRLA_SAMPA) |
(0 << SAMD21_SERCOM_CTRLA_FORM) | /* no parity */
(0 << SAMD21_SERCOM_CTRLA_CMODE) | /* async */
(0 << SAMD21_SERCOM_CTRLA_CPOL) |
(1 << SAMD21_SERCOM_CTRLA_DORD)); /* LSB first */
(0 << SAMD21_SERCOM_CTRLA_SAMPA) |
(0 << SAMD21_SERCOM_CTRLA_FORM) | /* no parity */
(0 << SAMD21_SERCOM_CTRLA_CMODE) | /* async */
(0 << SAMD21_SERCOM_CTRLA_CPOL) |
(1 << SAMD21_SERCOM_CTRLA_DORD)); /* LSB first */