lunaix-os/kernel/time/clock.c

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