pub type W = W<CtlSpec>;
Register CTL writer
CTL
struct W { /* private fields */ }
Bit 3 - Valid event edge of time-stamp
Bit 4 - Reference clock detection function enable
Bit 5 - Shadow registers bypass control
Bit 6 - Clock System
Bit 8 - Alarm-0 function enable
Bit 11 - time-stamp function enable
Bit 12 - RTC alarm-0 interrupt enable
Bit 15 - Time-stamp interrupt enable
Bit 16 - Add 1 hour(summer time change
Bit 17 - Subtract 1 hour(winter time change)
Bit 18 - Daylight saving mark
Bit 19 - Calibration output selection
Bit 20 - Output polarity
Bits 21:22 - Output selection
Bit 23 - Calibration output enable