apps/plugins/rockboy/rtc.c

   1
   2
   3
   4 #include "rockmacros.h"
   5 #include <stdio.h>
   6
   7 #include "defs.h"
   8 #include "mem.h"
   9 #include "rtc-gb.h"
  10
  11 struct rtc rtc;
  12
  13 void rtc_latch(byte b)
  14 {
  15     if ((rtc.latch ^ b) & b & 1)
  16     {
  17         rtc.regs[0] = rtc.s;
  18         rtc.regs[1] = rtc.m;
  19         rtc.regs[2] = rtc.h;
  20         rtc.regs[3] = rtc.d;
  21         rtc.regs[4] = (rtc.d>>9) | (rtc.stop<<6) | (rtc.carry<<7);
  22         rtc.regs[5] = 0xff;
  23         rtc.regs[6] = 0xff;
  24         rtc.regs[7] = 0xff;
  25     }
  26     rtc.latch = b;
  27 }
  28
  29 void rtc_write(byte b)
  30 {
  31     /* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */
  32     if (!(rtc.sel & 8)) return;
  33     switch (rtc.sel & 7)
  34     {
  35     case 0:
  36         rtc.s = rtc.regs[0] = b;
  37         while (rtc.s >= 60) rtc.s -= 60;
  38         break;
  39     case 1:
  40         rtc.m = rtc.regs[1] = b;
  41         while (rtc.m >= 60) rtc.m -= 60;
  42         break;
  43     case 2:
  44         rtc.h = rtc.regs[2] = b;
  45         while (rtc.h >= 24) rtc.h -= 24;
  46         break;
  47     case 3:
  48         rtc.regs[3] = b;
  49         rtc.d = (rtc.d & 0x100) | b;
  50         break;
  51     case 4:
  52         rtc.regs[4] = b;
  53         rtc.d = (rtc.d & 0xff) | ((b&1)<<9);
  54         rtc.stop = (b>>6)&1;
  55         rtc.carry = (b>>7)&1;
  56         break;
  57     }
  58 }
  59
  60 void rtc_tick(void)
  61 {
  62     if (rtc.stop) return;
  63     if (++rtc.t == 60)
  64     {
  65         if (++rtc.s == 60)
  66         {
  67             if (++rtc.m == 60)
  68             {
  69                 if (++rtc.h == 24)
  70                 {
  71                     if (++rtc.d == 365)
  72                     {
  73                         rtc.d = 0;
  74                         rtc.carry = 1;
  75                     }
  76                     rtc.h = 0;
  77                 }
  78                 rtc.m = 0;
  79             }
  80             rtc.s = 0;
  81         }
  82         rtc.t = 0;
  83     }
  84 }
  85
  86 void rtc_save_internal(int fd)
  87 {
  88     int rt = 0;
  89
  90 #if CONFIG_RTC
  91     rt = rb->mktime(rb->get_time());
  92 #endif
  93     fdprintf(fd, "%d %d %d %d %d %d %d %d\n", rtc.carry, rtc.stop, rtc.d, rtc.h,
  94              rtc.m, rtc.s, rtc.t, rt);
  95 }
  96
  97 void rtc_load_internal(int fd)
  98 {
  99     int rt = 0;
 100     char buf[32];
 101
 102     rb->read_line(fd, buf, sizeof(buf));
 103     sscanf(buf, "%d %d %d %d %d %d %d %d\n", &rtc.carry, &rtc.stop, &rtc.d,
 104            &rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt);
 105
 106         while (rtc.t >= 60) rtc.t -= 60;
 107         while (rtc.s >= 60) rtc.s -= 60;
 108         while (rtc.m >= 60) rtc.m -= 60;
 109         while (rtc.h >= 24) rtc.h -= 24;
 110         while (rtc.d >= 365) rtc.d -= 365;
 111         rtc.stop &= 1;
 112         rtc.carry &= 1;
 113
 114 #if CONFIG_RTC
 115     if (rt) rt = (rb->mktime(rb->get_time()) - rt) * 60;
 116 #endif
 117     while (rt-- > 0) rtc_tick();
 118
 119 }
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