Francis Schumacher / nrf51_rtc

An attempt to provide a Real Time Clock for the nRF51-DK. This code provides rtc.time and rtc.set_time replacements for the similarly named C standard methods (unimplemented for nRF51-DK last I checked). Not very well tested, but it seems to work for simple applications.

Dependents:   nRF51_rtc_example LoRa_PIR BLE_Lightning_sensor BLE_AlarmWatch ... more

nrf51_rtc.h@0:3677a016109b, 2015-02-08 (annotated)

Committer:
fxschumacher
Date:
Sun Feb 08 01:28:47 2015 +0000
Revision:
0:3677a016109b
Initial revision -- library to implement Real Time Clock (time and set_time) for nRF51-DK.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
fxschumacher 0:3677a016109b 1 #ifndef NRF51_RTC_H
fxschumacher 0:3677a016109b 2 #define NRF51_RTC_H
fxschumacher 0:3677a016109b 3
fxschumacher 0:3677a016109b 4 #include "mbed.h"
fxschumacher 0:3677a016109b 5
fxschumacher 0:3677a016109b 6 static class nrf51_rtc {
fxschumacher 0:3677a016109b 7 // class to create equivalent of time() and set_time()
fxschumacher 0:3677a016109b 8 // ...depends upon RTC1 to be running and to never stop -- a byproduct of instantiation of mbed library's "ticker"
fxschumacher 0:3677a016109b 9 public:
fxschumacher 0:3677a016109b 10 nrf51_rtc();
fxschumacher 0:3677a016109b 11 time_t time();
fxschumacher 0:3677a016109b 12 int set_time(time_t rawtime);
fxschumacher 0:3677a016109b 13
fxschumacher 0:3677a016109b 14 // these should be private
fxschumacher 0:3677a016109b 15 private:
fxschumacher 0:3677a016109b 16 time_t time_base;
fxschumacher 0:3677a016109b 17 unsigned int rtc_previous;
fxschumacher 0:3677a016109b 18 unsigned int ticks_per_second, counter_size_in_seconds;
fxschumacher 0:3677a016109b 19 void update_rtc(); // similar to "time" but doesn't return the value, just updates underlying variables
fxschumacher 0:3677a016109b 20
fxschumacher 0:3677a016109b 21 } rtc;
fxschumacher 0:3677a016109b 22 #endif