mc146818a.hpp

   1 #ifndef MC146818A_HPP
   2 #define MC146818A_HPP
   3
   4 #include <time.h>
   5
   6 #include "device.hpp"
   7 #include "timer.hpp"
   8 #include "io.hpp"
   9
  10 class RTC : public Device
  11 {
  12 public:
  13     RTC(int32_t base_year, struct tm &tm);
  14     virtual ~RTC(void);
  15
  16     void reset(void);
  17
  18     uint8_t cmos_read(uint8_t index);
  19     void cmos_write(uint8_t index, uint8_t data);
  20
  21     OutputPin irq;
  22
  23 private:
  24     int from_bcd(int a);
  25     int to_bcd(int a);
  26
  27     void update_timer(int64_t current_time);
  28     void set_time(void);
  29     void copy_date(void);
  30
  31     void on_periodic(void);
  32     void on_second(void);
  33     void on_second2(void);
  34
  35     int32_t base_year;
  36
  37     uint8_t cmos_data[128];
  38     struct tm current_tm;
  39
  40     int64_t next_periodic_time;
  41     int64_t next_second_time;
  42
  43     Timer periodic_timer;
  44     Timer second_timer;
  45     Timer second_timer2;
  46 };
  47
  48 #endif