DCF77

This is a platform independent DCF77 signal processing for micro controllers written in c. It only needs a periodic call of 10ms interval passing the signal status of a digital input from the receiver hardware. One can call it by a periodic ISR, a Round Robin algorithm or a timer callback.
There is also a polling function that returns the RTC clock data by a data structure. The clock continues to run also if there is no DCF signal. The exact data and functions is found in the header file dcf77.h.