lunaix-os/kernel/time/clock.c

   1 #include <hal/rtc.h>
   2 #include <lunaix/clock.h>
   3 #include <lunaix/spike.h>
   4 #include <lunaix/timer.h>
   5
   6 static volatile time_t sys_time;
   7
   8 void
   9 clock_systime_counter(void* arg);
  10
  11 void
  12 clock_init()
  13 {
  14     if (!timer_context()) {
  15         panick("Systimer not initialized");
  16     }
  17
  18     // 系统计时器每毫秒累加。
  19     timer_run_ms(1, clock_systime_counter, NULL, TIMER_MODE_PERIODIC);
  20 }
  21
  22 void
  23 clock_systime_counter(void* arg)
  24 {
  25     sys_time++;
  26 }
  27
  28 int
  29 clock_datatime_eq(datetime_t* a, datetime_t* b)
  30 {
  31     return a->year == b->year && a->month == b->month && a->day == b->day &&
  32            a->weekday == b->weekday && a->minute == b->minute &&
  33            a->second == b->second;
  34 }
  35
  36 void
  37 clock_walltime(datetime_t* datetime)
  38 {
  39     datetime_t current;
  40
  41     do {
  42         while (rtc_read_reg(RTC_REG_A) & 0x80)
  43             ;
  44         memcpy(&current, datetime, sizeof(datetime_t));
  45
  46         datetime->year = rtc_read_reg(RTC_REG_YRS);
  47         datetime->month = rtc_read_reg(RTC_REG_MTH);
  48         datetime->day = rtc_read_reg(RTC_REG_DAY);
  49         datetime->weekday = rtc_read_reg(RTC_REG_WDY);
  50         datetime->hour = rtc_read_reg(RTC_REG_HRS);
  51         datetime->minute = rtc_read_reg(RTC_REG_MIN);
  52         datetime->second = rtc_read_reg(RTC_REG_SEC);
  53     } while (!clock_datatime_eq(datetime, &current));
  54
  55     uint8_t regbv = rtc_read_reg(RTC_REG_B);
  56
  57     // Convert from bcd to binary when needed
  58     if (!RTC_BIN_ENCODED(regbv)) {
  59         datetime->year = bcd2dec(datetime->year);
  60         datetime->month = bcd2dec(datetime->month);
  61         datetime->day = bcd2dec(datetime->day);
  62         datetime->hour = bcd2dec(datetime->hour);
  63         datetime->minute = bcd2dec(datetime->minute);
  64         datetime->second = bcd2dec(datetime->second);
  65     }
  66
  67     // To 24 hour format
  68     if (!RTC_24HRS_ENCODED(regbv) && (datetime->hour >> 7)) {
  69         datetime->hour = (12 + datetime->hour & 0x80);
  70     }
  71
  72     datetime->year += RTC_CURRENT_CENTRY * 100;
  73 }
  74
  75 time_t
  76 clock_unixtime()
  77 {
  78     datetime_t dt;
  79     clock_walltime(&dt);
  80     return clock_tounixtime(&dt);
  81 }
  82
  83 time_t
  84 clock_systime()
  85 {
  86     return sys_time;
  87 }